6 CCR 1007-1
PART 16: RADIATION SAFETY REQUIREMENTS FOR WIRELINE SERVICE OPERATIONS AND SUBSURFACE TRACER STUDIES RADIATION SAFETY REQUIREMENTS FOR WIRELINE SERVICE OPERATIONS AND SUBSURFACE TRACER STUDIES
16.1 Purpose and Scope.
16.1.1 Authority. [Eff 04/01/2007]
Rules and regulations set forth herein are adopted pursuant to the provisions of Sections 25-1- 108, 25-1.5-101(1)(l), and 25-11-104, CRS. [Eff 04/01/2007]
16.1.2 Basis and Purpose. [Eff 04/01/2007]
A statement of basis and purpose accompanies this part and changes to this part. A copy may be obtained from the Department. [Eff 04/01/2007]
16.1.3 Scope. [Eff 04/01/2007]
The regulations in this part establish radiation safety requirements for using sources of radiation for wireline service operations including mineral-logging, radioactive markers, and subsurface tracer studies. [Eff 04/01/2007]
16.1.4 Applicability. [Eff 04/01/2007]
The regulations in this part apply to all applicants, licensees or registrants who use sources of radiation for wireline service operations including mineral-logging, radioactive markers, or subsurface tracer studies. The requirements of this part are in addition to, and not in substitution for, the requirements of Parts 1, 2, 3, 4, and 10 of these regulations. [Eff 04/01/2007]
16.1.5 Published Material Incorporated by Reference. [Eff 04/01/2007]
Published material incorporated in Part 16 by reference is available in accord with Part 1, Section 1.4. [Eff 04/01/2007]
16.2 Definitions.
As used in this part, these terms have the definitions set forth as follows. [Eff 04/01/2007] “Energy compensation source” (ECS) means a small sealed source, with an activity not exceeding 3.7 MBq (100 microcurie), used within a logging tool, or other tool components, to provide a reference standard to maintain the tool's calibration when in use. [Eff 04/01/2007] “Field station” means a facility where radioactive sources may be stored or used and from which equipment is dispatched to temporary jobsites. [Eff 04/01/2007] “Injection tool” means a device used for controlled subsurface injection of radioactive tracer material. [Eff 04/01/2007] “Irretrievable well-logging source” means any sealed source containing licensed material that is pulled off or not connected to the wireline that suspends the source in the well and for which all reasonable effort at recovery has been expended. [Eff 04/01/2007] “Logging assistant” means any individual who, under the personal supervision of a logging supervisor, handles sealed sources or tracers that are not in logging tools or shipping containers or who performs surveys required by 16.22. [Eff 04/01/2007] “Logging supervisor” means the individual who uses sources of radiation or provides personal supervision of the utilization of sources of radiation at the well site. [Eff 04/01/2007] “Logging tool” means a device used subsurface to perform well-logging. [Eff 04/01/2007] “Mineral logging” means any logging performed for the purpose of mineral exploration other than oil or gas. [Eff 04/01/2007] “Personal supervision” means guidance and instruction by the supervisor who is physically present at the jobsite and watching the performance of the operation in such proximity that contact can be maintained and immediate assistance given as required. [Eff 04/01/2007] “Radioactive marker” means radioactive material placed subsurface or on a structure intended for subsurface use for the purpose of depth determination or direction orientation. [Eff 04/01/2007] “Safety review” means a periodic review provided by the licensee for its employees on radiation safety aspects of well-logging, with opportunities for employees to ask safety questions. The review shall include, as appropriate, the results of internal inspections, new procedures or equipment, and accidents or errors that have been observed. [Eff 04/01/2007] “Source holder” means a housing or assembly into which a radioactive source is placed for the purpose of facilitating the handling and use of the source in well-logging operations. [Eff 04/01/2007] “Subsurface tracer study” means the release of a substance tagged with radioactive material for the purpose of tracing the movement or position of the tagged substance in the well-bore or adjacent formation. [Eff 04/01/2007] “Temporary jobsite” means a location where radioactive materials are present for the purpose of performing wireline service operations or subsurface tracer studies. [Eff 04/01/2007] “Tritium neutron generator target source” means a tritium source used within a neutron generator tube to produce neutrons for use in well-logging applications. [Eff 04/01/2007] “Uranium sinker bar” means a weight containing depleted uranium used to pull a logging tool down toward the bottom of a well. [Eff 04/01/2007] “Well-bore” means a drilled hole in which wireline service operations and subsurface tracer studies are performed. [Eff 04/01/2007] “Well-logging” means all operations involving the lowering and raising of measuring devices or tools which may contain sources of radiation into well-bores or cavities for the purpose of obtaining information about the well or adjacent formations. [Eff 04/01/2007] “Wireline” means a cable containing one or more electrical conductors which is used to lower and raise logging tools in the well-bore. [Eff 04/01/2007] “Wireline service operation” means any evaluation or mechanical service which is performed in the well-bore using devices on a wireline. [Eff 04/01/2007] PROHIBITION
16.4 Prohibition.
No licensee shall perform wireline service operations with a sealed source(s) unless, prior to commencement of the operation, the licensee has a written agreement with the well-operator, well-owner, drilling contractor, or land owner that: [Eff 04/01/2007] 16.4.1 In the event a sealed source is lodged downhole, a reasonable effort at recovery will be made; and [Eff 04/01/2007] 16.4.2 In the event a decision is made to abandon the sealed source downhole, the requirements of 16.25 and of any other State agency having applicable regulations shall be met. [Eff 04/01/2007] EQUIPMENT CONTROL
16.5 Limits on Levels of Radiation.
Sources of radiation shall be used, stored, and transported in such a manner that the transportation requirements of Part 17 and the dose limitation requirements of Part 4 of these regulations are met. [Eff 04/01/2007]
16.6 Storage Precautions.
16.6.1 Each source of radiation, except an accelerator, shall be provided with a storage or transport container. The container shall be provided with a lock, or tamper seal for calibration sources, to prevent unauthorized removal of, or exposure to, the source of radiation. [Eff 04/01/2007] 16.6.2 Sources of radiation shall be stored in a manner which will minimize danger from explosion or fire. [Eff 04/01/2007]
16.7 Transport Precautions.
Transport containers shall be physically secured to the transporting vehicle to prevent accidental loss, tampering, or unauthorized removal. [Eff 04/01/2007]
16.8 Radiation Survey Instruments.
16.8.1 The licensee or registrant shall keep a calibrated and operable radiation survey instrument capable of detecting beta and gamma radiation at each field station and temporary jobsite to make the radiation surveys required by this part and by Part 4 of these regulations. To satisfy this requirement, the radiation survey instrument must be capable of measuring 0.001 mSv (0.1 mrem) per hour through at least 0.5 mSv (50 mrem) per hour. [Eff 04/01/2007]
16.8.2 Each radiation survey instrument shall be calibrated: [Eff 04/01/2007]
16.8.2.1 At intervals not to exceed 6 months and after each instrument servicing; [Eff 04/01/2007] [Eff 04/01/2007] 16.8.2.2 For linear scale instruments, at two points located approximately 1/3 and 2/3 of full- scale on each scale; for logarithmic scale instruments, at midrange of each decade, and at two points of at least one decade; and for digital instruments, at appropriate points; and [Eff 04/01/2007] [Eff 04/01/2007] 16.8.2.3 So that accuracy within 20 percent of the true radiation level can be demonstrated on each scale. [Eff 04/01/2007] [Eff 04/01/2007] 16.8.3 Calibration records shall be maintained for a period of 2 years for inspection by the Department. [Eff 04/01/2007]
16.9 Leak Testing of Sealed Sources.
16.9.1 Requirements. [Eff 04/01/2007]
Each licensee using sealed sources of radioactive material shall have the sources tested for leakage. Records of leak test results shall be kept in units of becquerel (Bq) (or microcurie, µCi) and maintained for inspection by the Department for 6 months after the next required leak test is performed or until transfer or disposal of the sealed source. [Eff 04/01/2007]
16.9.2 Method of Testing. [Eff 04/01/2007]
16.9.2.1 Tests for leakage shall be performed using a leak test kit or method approved by the Department, the U.S. Nuclear Regulatory Commission, an Agreement State, or a Licensing State. [Eff 04/01/2007] [Eff 04/01/2007] 16.9.2.2 The test sample shall be taken from the nearest accessible point to the surface of the sealed source where contamination is likely to accumulate. [Eff 04/01/2007] [Eff 04/01/2007] 16.9.2.3 The test sample shall be analyzed for radioactive contamination. [Eff 04/01/2007] [Eff 04/01/2007] 16.9.2.4 The analysis shall be capable of detecting the presence of 185 Bq (0.005 microcurie) of radioactive material on the test sample and must be performed by a person specifically approved by the Department, the U.S. Nuclear Regulatory Commission, an Agreement State, or a Licensing State to perform the analysis. [Eff 04/01/2007] [Eff 04/01/2007]
16.9.3 Interval of Testing. [Eff 04/01/2007]
16.9.3.1 Each sealed source of radioactive material (except an energy compensation source (ECS)) shall be tested at intervals not to exceed 6 months. In the absence of a certificate from a transferor indicating that a test has been made within 6 months prior to the transfer, the sealed source shall not be used until tested. [Eff 04/01/2007] [Eff 04/01/2007] 16.9.3.2 Each ECS that is not exempt from testing in accordance with 16.9.5 must be tested at intervals not to exceed 3 years. In the absence of a certificate from a transferor indicating that a test has been made within the 3 years prior to the transfer, the ECS shall not be used until tested. [Eff 04/01/2007] [Eff 04/01/2007]
16.9.4 Leaking or Contaminated Sources. [Eff 04/01/2007]
If, for any reason, it is suspected that a sealed source may be leaking, it shall be removed from service immediately and tested for leakage as soon as practical. [Eff 04/01/2007] 16.9.4.1 If the test reveals the presence of 185 Bq (0.005 microcurie) or more of removable radioactive material, the licensee shall immediately withdraw the source from use and shall cause it to be decontaminated and repaired, or disposed of, by a licensee authorized by the Department, U.S. Nuclear Regulatory Commission, Agreement State, or a Licensing State to perform these functions. [Eff 04/01/2007] [Eff 04/01/2007] 16.9.4.2 The licensee shall check the equipment associated with the leaking source for radioactive contamination and, if contaminated, have it decontaminated or disposed of by a licensee authorized by the Department, U.S. Nuclear Regulatory Commission, Agreement State, or a Licensing State to perform these functions. [Eff 04/01/2007] [Eff 04/01/2007] 16.9.4.3 A report describing the equipment involved, the test results, and the corrective action taken shall be filed with the Department within 5 days of receiving the test results. [Eff 04/01/2007] [Eff 04/01/2007]
16.9.5 Exemptions. [Eff 04/01/2007]
The following sources are exempted from the periodic leak test requirements of 16.9.1 through 16.9.4: [Eff 04/01/2007]
16.9.5.1 Hydrogen-3 (tritium) sources; [Eff 04/01/2007] [Eff 04/01/2007]
16.9.5.2 Sources of radioactive material with a half-life of 30 days or less; [Eff 04/01/2007] [Eff 04/01/2007] 16.9.5.3 Sealed sources of radioactive material in gaseous form; [Eff 04/01/2007] [Eff 04/01/2007] 16.9.5.4 Sources of beta- or gamma-emitting radioactive material with an activity of 3.7 MBq (100 microcurie) or less; and [Eff 04/01/2007] [Eff 04/01/2007] 16.9.5.5 Sources of alpha-emitting radioactive material with an activity of 0.37 MBq (10 microcurie) or less. [Eff 04/01/2007] [Eff 04/01/2007]
16.10 Quarterly Inventory.
16.10.1 Each licensee or registrant shall conduct a quarterly physical inventory to account for all sources of radiation. [Eff 04/01/2007] 16.10.2 Records of inventories shall be maintained for 2 years from the date of the inventory for inspection by the Department and shall include the quantities and kinds of sources of radiation, the location where sources of radiation are assigned, the date of the inventory, and the name of the individual conducting the inventory. [Eff 04/01/2007]
16.11 Utilization Records.
16.11.1 Each licensee or registrant shall maintain current records, which shall be kept available for inspection by the Department for 2 years from the date of the recorded event. [Eff 04/01/2007] 16.11.2 The records shall show the following information for each source of radiation: [Eff 04/01/2007] 16.11.2.1 Make, model number, and a serial number or a description of each source of radiation used; [Eff 04/01/2007] [Eff 04/01/2007] 16.11.2.2 The identity of the well-logging supervisor or field unit to whom assigned; and [Eff 04/01/2007] [Eff 04/01/2007] 16.11.2.3 Locations where used and dates of use. [Eff 04/01/2007] [Eff 04/01/2007] 16.11.3 In the case of tracer materials and radioactive markers, the utilization record shall indicate the radionuclide and activity used in a particular well. [Eff 04/01/2007] 16.12 Design, Performance, and Certification Criteria for Sealed Sources Used in Downhole Operations.
16.12.1 Each sealed source, except energy compensation sources (ECS) and those containing radioactive material in gaseous form, used in downhole operations and manufactured after December 30, 1986, shall be certified by the manufacturer, or other testing organization acceptable to the Department, to meet the following minimum criteria: [Eff 04/01/2007] 16.12.1.1 Be of doubly encapsulated construction; [Eff 04/01/2007] [Eff 04/01/2007] 16.12.1.2 Contain radioactive material whose chemical and physical forms are as insoluble and non-dispersible as practical; and [Eff 04/01/2007] [Eff 04/01/2007] 16.12.1.3 Satisfies the requirements of 16.12.3.1, 16.12.3.2, or 16.12.3.3, as appropriate. [Eff 04/01/2007] [Eff 04/01/2007] 16.12.2 For sealed sources, except those containing radioactive material in gaseous form, acquired after December 30, 1986, in the absence of a certificate from a transferor certifying that an individual sealed source meets the requirements of 16.12.1, the sealed source shall not be put into use until such determinations and testing have been performed. [Eff 04/01/2007] 16.12.3 Each sealed source, except energy compensation sources (ECS) and those containing radioactive material in gaseous form, used in downhole operations after December 30, 1986, shall be certified by the manufacturer, or other testing organization acceptable to the Department, as meeting the sealed source performance requirements for oil well-logging: [Eff 04/01/2007] 16.12.3.1 For a sealed source manufactured on or before July 14, 1989, a licensee may use the sealed source, for use in well logging applications, if it meets the requirements of United States Of America Standards Institute (USASI) N5.10-1968, “Classification of Sealed Radioactive Sources” (1968), or the requirements in 16.12.3.2 or 16.12.3.3. [Eff 04/01/2007] [Eff 04/01/2007] 16.12.3.2 For a sealed source manufactured after July 14, 1989, a licensee may use the sealed source, for use in well logging applications, if it meets the oil well logging requirements of American National Standards Institute / Health Physics Society (ANSI/HPS) N43.6-1997, “Sealed Radioactive Sources Classification” (November 1997). [Eff 04/01/2007] [Eff 04/01/2007] 16.12.3.3 For a sealed source manufactured after July 14, 1989, a licensee may use the sealed source, for use in well logging applications, if the sealed source's prototype has been tested and found to maintain its integrity after each of the following tests: [Eff 04/01/2007] [Eff 04/01/2007]
16.12.4 Certification documents shall be maintained for inspection by the Department for a period of 2 years after source disposal. If the source is abandoned downhole, the certification documents shall be maintained until the Department authorizes disposition. [Eff 04/01/2007] 16.12.5 Use of an energy compensation source (ECS) is subject to this part, except that if the ECS is contained within a logging tool, or other tool components, and contains quantities of licensed material not exceeding 3.7 MBq (100 microcurie), the ECS is only subject to the requirements: [Eff 04/01/2007] 16.12.5.1 Of 16.9, 16.10 and 16.11 for well logging applications with a surface casing for protecting fresh water aquifers; or [Eff 04/01/2007] [Eff 04/01/2007] 16.12.5.2 Of 16.9, 16.10, 16.11, 16.12 and 16.25 for well logging applications without a surface casing for protecting fresh water aquifers. [Eff 04/01/2007] [Eff 04/01/2007] 16.12.6 Use of a tritium neutron generation target source is subject to this part, except the requirements: [Eff 04/01/2007] 16.12.6.1 Of 16.12 and 16.25 do not apply for use of a tritium neutron generation target source containing quantities not exceeding 1,110 MBq (30 curie) and in a well with a surface casing for protecting fresh water aquifers; and [Eff 04/01/2007] [Eff 04/01/2007] 16.12.6.2 Of 16.12 do not apply for use of a tritium neutron generation target source containing quantities exceeding 1,110 MBq (30 curie) or in a well without a surface casing for protecting fresh water aquifers. [Eff 04/01/2007] [Eff 04/01/2007]
16.13 Labeling.
16.13.1 Each source, source holder, or logging tool containing radioactive material shall bear a durable, legible, and clearly visible marking or label, which has, as a minimum, the standard radiation caution symbol, without the conventional color requirement, and the following wording: [Eff 04/01/2007] DANGER* – RADIOACTIVE [Eff 04/01/2007] *or “CAUTION” [Eff 04/01/2007] This labeling shall be on the smallest component transported as a separate piece of equipment. [Eff 04/01/2007] 16.13.2 Each transport container shall have permanently attached to it a durable, legible, and clearly visible label which has, as a minimum, the standard radiation caution symbol and the following wording: [Eff 04/01/2007] DANGER*- RADIOACTIVE [Eff 04/01/2007] NOTIFY CIVIL AUTHORITIES [OR NAME OF COMPANY] [Eff 04/01/2007] *or “CAUTION” [Eff 04/01/2007] 16.13.3 The licensee may use a uranium sinker bar in well logging applications only if it is legibly impressed with the following wording: [Eff 04/01/2007] CAUTION--RADIOACTIVE--DEPLETED URANIUM [Eff 04/01/2007] and [Eff 04/01/2007] NOTIFY CIVIL AUTHORITIES [OR COMPANY NAME] IF FOUND [Eff 04/01/2007]
16.14 Inspection and Maintenance.
16.14.1 Each licensee or registrant shall conduct, at intervals not to exceed 6 months, a program of inspection and maintenance of source holders, logging tools, source handling tools, storage containers, transport containers, and injection tools to assure proper labeling and physical condition. [Eff 04/01/2007] 16.14.2 If any inspection conducted pursuant to 16.14.1 reveals damage to labeling or components critical to radiation safety, the device shall be removed from service until repairs have been made. [Eff 04/01/2007] 16.14.3 If a sealed source is stuck in the source holder, the licensee shall not perform any operation, such as drilling, cutting, or chiseling, on the source holder unless the licensee is specifically approved by the U.S. Nuclear Regulatory Commission, an Agreement State, or a Licensing State to perform this operation. [Eff 04/01/2007] 16.14.4 The repair, opening, or modification of any sealed source shall be performed only by persons specifically authorized to do so by the Department, the U.S. Nuclear Regulatory Commission, an Agreement State, or a Licensing State. [Eff 04/01/2007] 16.14.5 Records of inspection and maintenance shall be maintained for a period of 2 years for inspection by the Department. [Eff 04/01/2007] REQUIREMENTS FOR PERSONNEL SAFETY
16.15 Training Requirements.
16.15.1 No licensee or registrant shall permit any individual to act as a logging supervisor as defined in this part until such individual has: [Eff 04/01/2007] 16.15.1.1 Received, in a course recognized by the Department, the U.S. Nuclear Regulatory Commission, an Agreement State, or a Licensing State, instruction in the subjects outlined in Appendix 16A and demonstrated an understanding thereof; [Eff 04/01/2007] [Eff 04/01/2007] 16.15.1.2 Read and received instruction in the regulations contained in this part and the applicable sections of Parts 1, 4, and 10 of these regulations or their equivalent, conditions of appropriate license or certificate of registration, and the licensee's or registrant's operating and emergency procedures, and demonstrated an understanding thereof; and [Eff 04/01/2007] [Eff 04/01/2007] 16.15.1.3 Demonstrated competence to use sources of radiation, related handling tools, and radiation survey instruments which will be used on the job. [Eff 04/01/2007] [Eff 04/01/2007] 16.15.2 No licensee or registrant shall permit any individual to assist in the handling of sources of radiation until such individual has: [Eff 04/01/2007] 16.15.2.1 Read or received instruction in the licensee's or registrant's operating and emergency procedures and demonstrated an understanding thereof; and [Eff 04/01/2007] [Eff 04/01/2007] 16.15.2.2 Demonstrated competence to use, under the personal supervision of the logging supervisor, the sources of radiation, related handling tools, and radiation survey instruments which will be used on the job. [Eff 04/01/2007] [Eff 04/01/2007] 16.15.3 The licensee shall provide safety reviews for logging supervisors and logging assistants at least once during each calendar year. [Eff 04/01/2007] 16.15.4 The licensee or registrant shall maintain employee training records for inspection by the Department for 2 years following termination of the individual's employment. [Eff 04/01/2007]
16.16 Operating and Emergency Procedures.
The licensee's or registrant's operating and emergency procedures shall include instructions in at least the following: [Eff 04/01/2007] 16.16.1 Handling and use of sources of radiation to be employed so that no individual is likely to be exposed to radiation doses in excess of the standards established in Part 4 of these regulations; [Eff 04/01/2007] 16.16.2 Methods and occasions for conducting radiation surveys; [Eff 04/01/2007] 16.16.3 Methods and occasions for locking and securing sources of radiation; [Eff 04/01/2007] 16.16.4 Personnel monitoring and the use of personnel monitoring equipment; [Eff 04/01/2007] 16.16.5 Transportation to temporary jobsites and field stations, including the packaging and placing of sources of radiation in vehicles, placarding of vehicles, and securing sources of radiation during transportation; [Eff 04/01/2007] 16.16.6 Minimizing exposure of individuals in the event of an accident; [Eff 04/01/2007] 16.16.7 Procedure for notifying proper personnel in the event of an accident; [Eff 04/01/2007]
16.16.8 Maintenance of records; [Eff 04/01/2007]
16.16.9 Use, inspection and maintenance of source holders, logging tools, source handling tools, storage containers, transport containers, and injection tools; [Eff 04/01/2007] 16.16.10 Procedure to be followed in the event a sealed source is lodged downhole; [Eff 04/01/2007] 16.16.11 Procedures to be used for picking up, receiving, and opening packages containing radioactive material; [Eff 04/01/2007] 16.16.12 For the use of tracers, decontamination of the environment, equipment, and personnel; [Eff 04/01/2007] 16.16.13 Maintenance of records generated by logging personnel at temporary jobsites; [Eff 04/01/2007] 16.16.14 Notifying proper persons in the event of an accident; and [Eff 04/01/2007] 16.16.15 Actions to be taken if a sealed source is ruptured, including actions to prevent the spread of contamination and minimize inhalation and ingestion of radioactive material and actions to obtain suitable radiation survey instruments as required by 16.8. [Eff 04/01/2007]
16.17 Personnel Monitoring.
16.17.1 No licensee or registrant shall permit any individual to act as a logging supervisor or to assist in the handling of sources of radiation unless each such individual wears, at all times during the handling of such sources, a personnel dosimeter that is processed and evaluated by an accredited National Voluntary Laboratory Accreditation Program (NVLAP) processor. [Eff 04/01/2007] 16.7.1.1 Each personnel dosimeter shall be assigned to and worn by only one individual. [Eff 04/01/2007] [Eff 04/01/2007] 16.7.1.2 Film badges must be replaced at least monthly. Other types of personnel dosimeter must be replaced at least quarterly. [Eff 04/01/2007] [Eff 04/01/2007] 16.7.1.3 After replacement, each personnel dosimeter must be promptly processed. [Eff 04/01/2007] [Eff 04/01/2007] 16.17.2 Personnel monitoring records shall be maintained for inspection until the Department authorizes disposition. [Eff 04/01/2007] PRECAUTIONARY PROCEDURES IN LOGGING AND SUBSURFACE TRACER OPERATIONS
16.18 Security.
During each logging or tracer application, the logging supervisor or other designated employee shall maintain direct surveillance of the operation to protect against unauthorized or unnecessary entry into a restricted area, as defined in Part 1 of these regulations. [Eff 04/01/2007]
16.19 Handling Tools.
The licensee shall provide and require the use of tools that will assure remote handling of sealed sources other than low-activity calibration sources. [Eff 04/01/2007]
16.20 Subsurface Tracer Studies.
16.20.1 Protective gloves and other appropriate protective clothing and equipment shall be used by all personnel handling radioactive tracer material. Precautions shall be taken to avoid ingestion or inhalation of radioactive material. [Eff 04/01/2007] 16.20.2 No licensee shall cause the injection of radioactive material into potable aquifers without prior written authorization from the Department and any other appropriate State agency. [Eff 04/01/2007]
16.21 Particle Accelerators.
No licensee or registrant shall permit aboveground testing of particle accelerators, designed for use in well-logging, which results in the production of radiation, except in areas or facilities controlled or shielded so that the requirements of 4.6 and 4.14 of these regulations, as applicable, are met. [Eff 04/01/2007] RADIATION SURVEYS AND RECORDS
16.22 Radiation Surveys.
16.22.1 Radiation surveys or calculations shall be made and recorded for each area where radioactive materials are stored. [Eff 04/01/2007] 16.22.2 Radiation surveys or calculations shall be made and recorded for the radiation levels in occupied positions and on the exterior of each vehicle used to transport radioactive material. Such surveys and calculations shall include each source of radiation or combination of sources to be transported in the vehicle. [Eff 04/01/2007] 16.22.3 If the sealed source assembly is removed from the logging tool before departing the jobsite, the logging tool detector shall be energized, or a survey meter used, to assure that the logging tool is free of contamination. [Eff 04/01/2007] 16.22.4 Radiation surveys shall be made and recorded at the jobsite or wellhead for each tracer operation, except those using hydrogen-3, carbon-14, and sulfur-35. These surveys shall include measurements of radiation levels before and after the operation. [Eff 04/01/2007] 16.22.5 Records required pursuant to 16.22.1 through 16.22.4 shall include the dates, the identification of individual(s) making the survey, the identification of survey instrument(s) used, and an exact description of the location of the survey. Records of these surveys shall be maintained for inspection by the Department for 2 years after completion of the survey. [Eff 04/01/2007]
16.23 Documents and Records Required at Field Stations.
Each licensee or registrant shall maintain, for inspection by the Department, the following documents and records for the specific devices and sources used at the field station: [Eff 04/01/2007] 16.23.1 Appropriate license, certificate of registration, or equivalent document(s); [Eff 04/01/2007]
16.23.2 Operating and emergency procedures; [Eff 04/01/2007]
16.23.3 Applicable regulations; [Eff 04/01/2007]
16.23.4 Records of the latest survey instrument calibrations pursuant to 16.8; [Eff 04/01/2007] 16.23.5 Records of the latest leak test results pursuant to 16.9; [Eff 04/01/2007] 16.23.6 Records of quarterly inventories required pursuant to 16.10; [Eff 04/01/2007]
16.23.7 Utilization records required pursuant to 16.11; [Eff 04/01/2007]
16.23.8 Records of inspection and maintenance required pursuant to 16.14; [Eff 04/01/2007]
16.23.9 Survey records required pursuant to 16.22; and [Eff 04/01/2007]
16.23.10 Training records required pursuant to 16.15. [Eff 04/01/2007]
16.24 Documents and Records Required at Temporary Jobsites.
Each licensee or registrant conducting operations at a temporary jobsite shall have the following documents and records available at that site for inspection by the Department: [Eff 04/01/2007]
16.24.1 Operating and emergency procedures; [Eff 04/01/2007]
16.24.2 Survey records required pursuant to 16.22 for the period of operation at the site; [Eff 04/01/2007] 16.24.3 Evidence of current calibration for the radiation survey instruments in use at the site; [Eff 04/01/2007] 16.24.4 When operating in the State under reciprocity, a copy of the appropriate license, certificate of registration, or equivalent document(s); and [Eff 04/01/2007] 16.24.5 Shipping papers for the transportation of radioactive material. [Eff 04/01/2007] NOTIFICATION
16.25 Notification of Incidents, Abandonment, and Lost Sources.
16.25.1 Notification of incidents and sources lost in other than downhole logging operations shall be made in accordance with appropriate provisions of 4.52 of these regulations. [Eff 04/01/2007] 16.25.2 Whenever a sealed source or device containing radioactive material is lodged downhole, the licensee shall: [Eff 04/01/2007] 16.25.2.1 Monitor at the surface for the presence of radioactive contamination with a radiation survey instrument or logging tool during logging tool recovery operations; and [Eff 04/01/2007] [Eff 04/01/2007] 16.25.2.2 Notify the Department immediately by telephone and subsequently within 30 days by confirmatory letter if the licensee knows or has reason to believe that a sealed source has been ruptured. This letter shall identify the well or other location, describe the magnitude and extent of the escape of radioactive material, assess the consequences of the rupture, and explain efforts being planned or taken to mitigate these consequences. [Eff 04/01/2007] [Eff 04/01/2007] 16.25.3 When it becomes apparent that efforts to recover the radioactive source will not be successful, the licensee shall: [Eff 04/01/2007] 16.25.3.1 Advise the well operator of the regulations of the Department regarding abandonment and an appropriate method of abandonment, which shall include: [Eff 04/01/2007] [Eff 04/01/2007]
16.25.3.2 Notify the Department by telephone, giving the circumstances that resulted in the inability to retrieve the source; and [Eff 04/01/2007] [Eff 04/01/2007]
16.25.3.3 File a written report with the Department within 30 days of the abandonment. The licensee shall send a copy of the report to the appropriate State agency that issued permits or otherwise approved of the drilling operation. The report shall contain the following information: [Eff 04/01/2007] [Eff 04/01/2007]
16.25.4 Whenever a sealed source containing radioactive material is abandoned downhole, the licensee shall provide a means to prevent inadvertent intrusion on the source, unless the source is not accessible to any subsequent drilling operations, and shall provide a permanent plaque 1 for posting the well or well-bore. This plaque shall: [Eff 04/01/2007] 1 An example of a suggested plaque is shown in Appendix 16B. [Eff 04/01/2007] 16.25.4.1 Be constructed of long-lasting material, such as stainless steel, brass, bronze, or monel; [Eff 04/01/2007] [Eff 04/01/2007] 16.25.4.2 Be mounted at the surface of the well, unless the mounting of the plaque is not practical; [Eff 04/01/2007] [Eff 04/01/2007] 16.25.4.3 Be at least 17 cm (7 inches) square and 3 mm (1/8 th inch) thick; and [Eff 04/01/2007] [Eff 04/01/2007] 16.25.4.4 Contain the following information engraved on its face: [Eff 04/01/2007] [Eff 04/01/2007]
16.25.5 The licensee shall immediately notify the Department by telephone and subsequently by confirming letter if the licensee knows or has reason to believe that radioactive material has been lost in or to an underground potable aquifer. Such notice shall designate the well location and shall describe the magnitude and extent of loss of radioactive material, assess the consequences of such loss, and explain efforts planned or being taken to mitigate these consequences. [Eff 04/01/2007] PART 16, APPENDIX 16A:
SUBJECTS TO BE INCLUDED IN TRAINING COURSES FOR LOGGING SUPERVISORS 16A.1 Fundamentals of Radiation Safety [Eff 04/01/2007] 16A.1.1 Characteristics of radiation [Eff 04/01/2007] 16A.1.2 Units of radiation dose and quantity of radioactivity [Eff 04/01/2007] 16A.1.3 Significance of radiation dose [Eff 04/01/2007]
EXAMPLE OF PLAQUE FOR IDENTIFYING WELLS CONTAINING SEALED SOURCES CONTAINING RADIOACTIVE MATERIAL ABANDONED DOWNHOLE The size of the plaque should be convenient for use on active or inactive wells, for example, a 7-inch square. Letter size of the word “CAUTION” should be approximately twice the letter size of the rest of the information, for example, 1/2-inch and 1/4-inch letter size, respectively. [Eff 04/01/2007] PART 17 : TRANSPORTATION OF RADIOACTIVE MATERIAL TRANSPORTATION OF RADIOACTIVE MATERIAL RH 17.1 Purpose and Scope.
The regulations in this part establish requirements for packaging, preparation for shipment, and transportation of radioactive material and apply to any person who transports radioactive material or delivers radioactive material to a carrier for transport. RH 17.2 Definitions.
As used in this part, the following definitions apply:
“Carrier” means a person engaged in the transportation of passengers or property by land or water as a common, contract, or private carrier, or by civil aircraft. “Closed transport vehicle” means a transport vehicle equipped with a securely attached exterior enclosure that during normal transportation restricts the access of unauthorized persons to the cargo space containing the radioactive material. The enclosure may be either temporary or permanent but shall limit access from top, sides, and ends. In the case of packaged materials, it may be of the “see-through” type.
“Exclusive use” means the sole use by a single consignor of a conveyance for which all initial, intermediate, and final loading and unloading are carried out in accordance with the direction of the consignor or consignee. The consignor and the carrier must ensure that any loading or unloading is performed by personnel having radiological training and resources appropriate for safe handling of the consignment. The consignor must issue specific instructions, in writing, for maintenance of exclusive use shipment controls, and include them with the shipping paper information provided to the carrier by the consignor.
“Fissile material” means plutonium-238, plutonium-239, plutonium-241, uranium-233, and uranium-235, or any combination of these radionuclides. Unirradiated natural uranium and depleted uranium, and natural uranium or depleted uranium that has been irradiated in thermal reactors only, are not included in this definition. 1 1 Department jurisdiction extends only to “special nuclear material in quantities not sufficient to form a critical mass” as defined in Part 1 of these regulations.
“Fissile material package” means a fissile material packaging together with its fissile material contents.
“Low specific activity (LSA) material” means radioactive material that satisfies the descriptions and limits set forth below. Shielding materials surrounding the LSA material may not be considered in determining the estimated average specific activity of the package contents. LSA material must be in one of three groups:
(1) LSA-I .
(2) LSA-II .
(3) LSA-III . Solids (e.g., consolidated wastes, activated materials) in which:
“Regulations of the U.S. Department of Transportation” means the regulations in 49 CFR Parts 100–189 and Parts 390–397.
“Regulations of the U.S. Nuclear Regulatory Commission” means the regulations in 10 CFR 71 for purposes of this Part.
“Specific activity” of a radionuclide means the radioactivity of a radionuclide per unit mass of that nuclide. The specific activity of a material in which the radionuclide is essentially uniformly distributed is the radioactivity per unit mass of the material. “State” means a State of the United States, the District of Columbia, the Commonwealth of Puerto Rico, the Virgin Islands, Guam, American Samoa, and the Commonwealth of the Northern Mariana Islands.
“Surface contaminated object” (SCO) means a solid object that is not itself classed as radioactive material, but which has radioactive material distributed on any of its surfaces. SCO must be in one of two groups with surface activity not exceeding the following limits:
1. SCO-I: a solid object on which:
2. SCO-II: a solid object on which the limits for SCO-I are exceeded and on which:
“Transport index” means the dimensionless number, rounded up the next tenth, placed on the label of a package to designate the degree of control to be exercised by the carrier during transportation. The transport index is the number expressing the maximum radiation level at 1 meter (3.3 feet) from the external surface of the package in millisievert (mSv) per hour multiplied by 100 (equivalent to the maximum radiation level in millirem per hour at 1 meter). “Type A quantity” means a quantity of radioactive material, the aggregate radioactivity of which does not exceed A for special form radioactive material or A for normal form radioactive 1 2 material, where A and A are given in Appendix A of this Part 17 or may be determined by 1 2 procedures described in Appendix A of this Part 17.
“Type A package” means a packaging that, together with its radioactive contents limited to A or A as appropriate, meets the requirements of 49 CFR 173.410 and 173.412 and is designed to retain the integrity of containment and shielding under normal conditions of transport as demonstrated by the tests set forth in 173.465 or 173.466, as appropriate. “Type B package” means a Type B packaging together with its radioactive contents. 2 2 A Type B package design is designated as B(U) or B(M). B(U) refers to the need for unilateral approval of international shipments; B(M) refers to the need for multilateral approval. There is no distinction made in how packages with these designations may be used in domestic transportation. To determine their distinction for international transportation, refer to 49 CFR Part 173. A Type B package approved prior to September 6, 1983 was designated only as Type B. Limitations on its use are specified in RH 17.8. “Type B packaging” means a packaging designed to retain the integrity of containment and shielding when subjected to the normal conditions of transport and hypothetical accident test conditions set forth 10 CFR Part 71.
“Type B quantity” means a quantity of radioactive material greater than a Type A quantity. General Regulatory Provisions RH 17.3 Requirement for License.
No person shall transport radioactive material or deliver radioactive material to a carrier for transport except as authorized in a general or specific license issued by the Department or as exempted in RH 17.4.
RH 17.4 Exemptions.
17.4.1 Common and contract carriers, freight forwarders, and warehouse workers which are subject to the requirements of the U.S. Department of Transportation in 49 CFR 170 through 189 or the U.S. Postal Service in the Postal Service Manual (Domestic Mail Manual), are exempt from the requirements of this part to the extent that they transport or store radioactive material in the regular course of their carriage for others or storage incident thereto. Common and contract carriers who are not subject to the requirements of the U.S. Department of Transportation or U.S. Postal Service are subject to RH 17.3 and other applicable requirements of these regulations.
17.4.2 Any licensee is exempt from the requirements of this part to the extent that the licensee delivers to a carrier for transport a package containing radioactive material having a specific activity not greater than 70 Bq/g (0.002 microcurie per gram).
RH 17.5 Transportation of Licensed Material.
17.5.1 Each licensee who transports licensed material outside the site of usage, as specified in the Department license, or where transport is on public highways, or who delivers licensed material to a carrier for transport, shall:
17.5.1.1 Comply with the applicable requirements, appropriate to the mode of transport, of the regulations of the U.S. Department of Transportation, particularly the regulations of U.S. Department of transportation in the following areas:
17.5.1.2 The licensee shall also comply with applicable U.S. Department of Transportation regulations pertaining to the following modes of transportation:
17.5.1.3 Assure that any special instructions needed to safely open the package are sent to or have been made available to the consignee.
17.5.2 If, for any reason, the regulations of the U.S. Department of Transportation are not applicable to a shipment of licensed material, the licensee shall conform to the standards and requirements of 49 CFR Parts 170 through 189 appropriate to the mode of transport to the same extent as if the shipment was subject to the regulations.
General Licenses RH 17.6 General Licenses for Carriers.
17.6.1 A general license is hereby issued to any common or contract carrier not exempt under RH 17.4 to receive, possess, transport, and store radioactive material in the regular course of their carriage for others or storage incident thereto, provided the transportation and storage is in accordance with the applicable requirements, appropriate to the mode of transport, of the U.S. Department of Transportation insofar as such requirements relate to the loading and storage of packages, placarding of the transporting vehicle, and incident reporting. 3 17.6.2 A general license is hereby issued to any private carrier to transport radioactive material, provided the transportation is in accordance with the applicable requirements, appropriate to the mode of transport, of the U.S. Department of Transportation insofar as such requirements relate to the loading and storage of packages, placarding of the transporting vehicle, and incident reporting. 3 3 Notification of an incident shall be filed with, or made to, the Department as prescribed in 49 CFR, regardless of and in addition to the notification made to the U.S. Department of Transportation or other agencies.
17.6.3 Persons who transport radioactive material pursuant to the general licenses in RH 17.6.1 or 17.6.2 are exempt from the requirements of Parts 4 and 10 of these regulations to the extent that they transport radioactive material.
RH 17.7 General License: Nuclear Regulatory Commission-Approved Packages.
17.7.1 A general license is hereby issued to any licensee of the Department to transport, or to deliver to a carrier for transport, licensed material in a package for which a license, certificate of compliance, or other approval has been issued by the Nuclear Regulatory Commission.
17.7.2 This general license applies only to a licensee who:
17.7.2.1 Has a copy of the specific license, certificate of compliance, or other approval by the Nuclear Regulatory Commission of the package and has the drawings and other documents referenced in the approval relating to the use and maintenance of the packaging and to the action to be taken prior to shipment;
17.7.2.2 Complies with the terms and conditions of the license, certificate, or other approval by the Nuclear Regulatory Commission, as applicable, and the applicable requirements of this Part 17;
17.7.2.3 Prior to the licensee's first use of the package, has registered with the Nuclear Regulatory Commission; and
17.7.2.4 Has a quality assurance program required by RH 17.20.
17.7.3 The general license in RH 17.7.1 applies only when the package approval authorizes use of the package under this general license.
17.7.4 For a Type B or fissile material package, the design of which was approved by Nuclear Regulatory Commission before April 1, 1996, the general license is subject to additional restrictions of RH 17.8.
RH 17.8 General License: Previously Approved Type B Packages.
17.8.1 A Type B package previously approved by the Nuclear Regulatory Commission, but not designated as B(U) or B(M) in the Nuclear Regulatory Commission certificate of compliance, may be used under the general license of RH 17.7 with the following additional conditions:
17.8.1.1 Fabrication of the packaging was satisfactorily completed before August 31, 1986, as demonstrated by application of its model number in accordance with Nuclear Regulatory Commission regulations at 10 CFR 71.85(c);
17.8.1.2 A package used for a shipment to a location outside the United States is subject to multilateral approval, as defined in U.S. Department of Transportation regulations at 49 CFR 173.403; and 17.8.1.3 A serial number which uniquely identifies each packaging which conforms to the approved design is assigned to, and legibly and durably marked on, the outside of each packaging.
17.8.2 A Type B(U) package, a Type B(M) package, a low specific activity (LSA) material package or a fissile material package, previously approved by the nuclear regulatory commission but without the designation “-85” in the identification number of the Nuclear Regulatory Commission certificate of compliance, may be used under the general license of RH 17.8 with the following additional conditions:
17.8.2.1 Fabrication of the package is satisfactorily completed by April 1, 1999, as demonstrated by application of its model number in accordance with Nuclear Regulatory Commission regulations at 10 CFR 71.85(c);
17.8.2.2 A package used for a shipment to a location outside the United States is subject to multilateral approval except approved under special arrangement in accordance with U.S. Department of Transportation regulations at 49 CFR 173.403; and 17.8.2.3 A serial number that uniquely identifies each packaging which conforms to the approved design is assigned to, and legibly and durably marked on, the outside of each packaging.
RH 17.9 General License: U.S. Department of Transportation Specification Container.
17.9.1 A general license is issued to any licensee of the Department to transport, or to deliver to a carrier for transport, licensed material in a specification container for fissile material or for a Type B quantity of radioactive material as specified in 49 CFR Parts 173 and 178.
17.9.2 This general license applies only to a licensee who:
17.9.2.1 Has a copy of the specification;
17.9.2.2 Complies with the terms and conditions of the specification and the applicable requirements of this Part 17; and
17.9.2.3 Has a quality assurance program required by 17.20.
17.9.3 The general license in RH 17.9.1 is subject to the limitation that the specification container may not be used for a shipment to a location outside the United States except by multilateral approval as defined in 49 CFR 173.403.
RH 17.10 General License: Use of Foreign Approved Package.
17.10.1 A general license is issued to any licensee of the Department to transport, or to deliver to a carrier for transport, licensed material in a package the design of which has been approved in a foreign national competent authority certificate and revalidated by the U.S. Department of Transportation as meeting the applicable requirements of 49 CFR 171.12.
17.10.2 This general license applies only to international shipments.
17.10.3 This general license applies only to a licensee who:
17.10.3.1 Has a copy of the applicable certificate, the revalidation, and the drawings and other documents referenced in the certificate relating to the use and maintenance of the packaging and to the actions to be taken prior to shipment;
17.10.3.2 Complies with the terms and conditions of the certificate and revalidation, and with the applicable requirements of this Part 17; and 17.10.3.3 Has a quality assurance program approved by the Nuclear Regulatory Commission. RH 17.11 General License: Fissile Material, Limited Quantity per Package.
17.11.1 A general license is hereby issued to any licensee to transport fissile material, or to deliver fissile material to a carrier for transport, if the material is shipped in accordance with this section.
17.11.2 This general license applies only when a package contains no more than a Type A quantity of radioactive material, including only one of the following:
17.11.2.1 Up to 40 grams of uranium-235; or
17.11.2.2 Up to 30 grams of uranium-233; or
17.11.2.3 Up to 25 grams of the fissile radionuclides of plutonium, except that for encapsulated plutonium-beryllium neutron sources in special form, an A quantity of plutonium may be present; or 17.11.2.4 A combination of fissile radionuclides in which the sum of the ratios of the amount of each radionuclide to the corresponding maximum amount in RH 17.11.2.1, 17.11.2.2, and
17.11.3 For packages where fissile material is mixed with substances having an average hydrogen density greater than water, this general license applies only when a package contains no more than a type a quantity of radioactive material, including only one of the following:
17.11.3.1 Up to 29 grams of uranium-235; or
17.11.3.2 Up to 18 grams of uranium-233; or
17.11.3.3 Up to 18 grams of the fissile radionuclides of plutonium; or
17.11.3.4 A combination of fissile radionuclides in which the sum of the ratios of the amount of each radionuclide to the corresponding maximum amount in RH 17.11.3.1, 17.11.3.2, and
17.11.4 Except as specified in RH 17.11.4.2, this general license applies only when all of the following requirements are met:
17.11.4.1 A package containing fissile radionuclides is labeled with a transport index not less than the number given by the following equation:
where the package contains x grams of uranium-235, y grams of uranium-233, and z grams of the fissile radionuclides of plutonium;
17.11.4.2 For a package in which the only fissile material is encapsulated plutonium-beryllium neutron sources in special form, the transport index based on criticality considerations may be taken as 0.025 times the number of grams of the fissile radionuclides of plutonium.
17.11.4.3 In all cases, the transport index must be rounded up to one decimal place and shall not exceed 10.0.
17.11.4.4 Except for the beryllium contained within the special form plutonium-beryllium sources authorized in rh 17.11.2, beryllium, graphite, or hydrogenous material enriched in deuterium is not present in quantities exceeding 0.1% of the fissile material mass.
17.11.4.5 The licensee has a quality assurance program approved by the nuclear regulatory commission.
RH 17.12 General License: Fissile Material, Limited Moderator per Package.
17.12.1 A general license is hereby issued to any licensee to transport fissile material, or to deliver fissile material to a carrier for transport, if the material is shipped in accordance with this section.
17.12.2 This general license applies only when all of the following requirements are met.
17.12.2.1 The package contains no more than a Type A quantity of radioactive material.
17.12.2.2 Neither beryllium nor hydrogenous material enriched in deuterium is present.
17.12.2.3 The total mass of graphite present does not exceed 7.7 times the total mass of uranium-235 plus plutonium.
17.12.2.4 Substances having a higher hydrogen density than water, for example certain hydrocarbon oils, are not present, except that polyethylene may be used for packing or wrapping.
17.12.2.5 Uranium-233 is not present, and the amount of plutonium does not exceed 1 percent of the amount of uranium-235.
17.12.2.6 The amount of uranium-235 is limited as follows:
17.12.2.7 The transport index of each package based on criticality considerations is taken as 10 times the number of grams of uranium-235 in the package divided by the maximum allowable number of grams per package in accordance with Table 1 or 2 of this section as applicable.
TABLE 1: PERMISSIBLE MASS OF URANIUM-235 PER FISSILE MATERIAL PACKAGE [NONUNIFORM DISTRIBUTION] Uranium enrichment in Permissible maximum weight percent of grams of uranium-235 uranium-235 not per package exceeding 24 40 20 42 15 45 11 48 10 51
9.5 52
9 54
8.5 55
8 57
7.5 59
7 60
6.5 62
6 65
5.5 68
5 72
4.5 76
4 80
3.5 88
3 100
2.5 120
2 164
1.5 272
1.35 320
1 680 *
0.92 1200 *
* Pursuant to the Department's agreement with the Nuclear Regulatory Commission, jurisdiction extends only to 350 grams of uranium-235.
TABLE 2: PERMISSIBLE MASS OF URANIUM-235 PER FISSILE MATERIAL PACKAGE [UNIFORM DISTRIBUTION] Uranium enrichment in Permissible maximum weight percent of grams of uranium-235 uranium-235 not per package exceeding 4 84
3.5 92
3 112
2.5 148
2 240
1.5 560 *
1.35 800*
* Pursuant to the Department's agreement with the Nuclear Regulatory Commission, jurisdiction extends only to 350 grams of uranium-235.
Operating Controls and Procedures RH 17.13 Fissile Material: Assumptions as to Unknown Properties of Fissile Material. When the isotopic abundance, mass, concentration, degree of irradiation, degree of moderation, or other pertinent property of fissile material in any package is not known, the licensee shall package the fissile material as if the unknown properties had credible values that would cause the maximum neutron multiplication.
RH 17.14 Preliminary Determinations.
Prior to the first use of any packaging for the shipment of radioactive material:
17.14.1 The licensee shall ascertain that there are no defects which could significantly reduce the effectiveness of the packaging;
17.14.2 Where the maximum normal operating pressure will exceed 35 kilopascal (5 pounds per square inch) gauge, the licensee shall test the containment systems at an internal pressure at least 50 percent higher than the maximum normal operating pressure to verify the capability of that system to maintain its structural integrity at that pressure;
17.14.3 The licensee shall determine that the packaging has been fabricated in accordance with the design approved by the Nuclear Regulatory Commission; and 17.14.4 The licensee shall conspicuously and durably mark the packaging with its model number, serial number, gross weight, and a package identification number as assigned by the Nuclear Regulatory Commission.
RH 17.15 Routine Determinations.
Prior to each shipment of licensed material, the licensee shall determine that:
17.15.1 The package is proper for the contents to be shipped;
17.15.2 The package is in unimpaired physical condition except for superficial defects such as marks or dents;
17.15.3 Each closure device of the packaging, including any required gasket, is properly installed and secured and free of defects;
17.15.4 Any system for containing liquid is adequately sealed and has adequate space or other specified provision for expansion of the liquid;
17.15.5 Any pressure relief device is operable and set in accordance with written procedures;
17.15.6 The package has been loaded and closed in accordance with written procedures;
17.15.7 Any structural part of the package which could be used to lift or tie down the package during transport is rendered inoperable for the purpose unless it satisfies design requirements specified in 10 CFR 71.45;
17.15.8 The level of non-fixed (removable) radioactive contamination on the external surfaces of each package offered for shipment is as low as reasonably achievable.
17.15.8.1 The level of non-fixed (removable) radioactive contamination may be determined by wiping an area of 300 square centimeters of the surface concerned with an absorbent material, using moderate pressure, and measuring the activity on the wiping material. Sufficient measurements must be taken in the most appropriate locations to yield a representative assessment of the removable contamination levels. Except as provided in RH 17.15.8.2, the amount of radioactivity measured on any single wiping material, when averaged over the surface wiped, must not exceed the limits given in Table 3 below at any time during transport. Other methods of assessment of equal or greater efficiency may be used. When other methods are used, the detection efficiency of the method used must be taken in account and in no case may the removable contamination on the external surfaces of the package exceed 10 times the limits listed in Table 3.
17.15.8.2 In the case of packages transported as exclusive use shipments by rail or highway only, the non-fixed (removable) radioactive contamination at any time during transport must not exceed 10 times the levels prescribed in RH 17.15.8.1. The levels at the beginning of transport must not exceed the levels in RH 17.15.8.1.
17.15.9 External radiation levels around the package and around the vehicle, if applicable will not exceed 2 mSv/h (200 millirems per hour) at any point on the external surface of the package at any time during transportation. The transport index shall not exceed 10.0; TABLE 3: NON-FIXED (REMOVABLE) EXTERNAL RADIOACTIVE CONTAMINATION WIPE LIMITS . Maximum Permissible Maximum Permissible Maximum Permissible Limits Limits Limits Contaminant Bq/cm2 2 2 uCi/cm dpm/cm Beta and gamma emitters 0.4 -5 22 and low toxicity alpha emitters All other alpha emitting 0.04 -6 2.2 radionuclides 17.15.10 For a package transported in exclusive use by rail, highway or water, radiation levels external to the package may exceed the limits specified in RH 17.15.9 but shall not exceed any of the following:
17.15.10.1 2 mSv/h (200 millirems per hour) on the accessible external surface of the package unless the following conditions are met, in which case the limit is 10 mSv/h (1000 millirems per hour);
17.15.10.2 2 mSv/h (200 millirems per hour) at any point on the outer surface of the vehicle, including the upper and lower surfaces, or, in the case of a flat-bed style vehicle, with a personnel barrier * , at any point on the vertical planes projected from the outer edges of the vehicle, on the upper surface of the load (or enclosure, if used), and on the lower external surface of the vehicle;
* A flat-bed style vehicle with a personnel barrier shall have radiation levels determined at vertical planes. If no personnel barrier is in place, the package cannot exceed 2 mSv/h (200 millirems per hour) at any accessible surface.
17.15.10.3 0.1 mSv/h (10 millirems per hour) at any point 2 meters from the vertical planes represented by the outer lateral surfaces of the vehicle, or, in the case of a flat-bed style vehicle, at any point 2 meters from the vertical planes projected from the outer edges of the vehicle; and 17.15.10.4 0.02 mSv/h (2 millirems per hour) in any normally occupied positions of the vehicle, except that this provision does not apply to private motor carriers when persons occupying these positions are provided with special health supervision, personnel radiation exposure monitoring devices, and training in accordance with RH 10.3 of these regulations; and 17.15.11 A package must be prepared for transport so that in still air at 100 degrees Fahrenheit (38 degrees Celsius) and in the shade, no accessible surface of a package would have a temperature exceeding 122 degrees Fahrenheit (50 degrees Celsius) in a nonexclusive use shipment or 180 degrees Fahrenheit (82 degrees Celsius) in an exclusive use shipment. Accessible package surface temperatures shall not exceed these limits at any time during transportation.
17.15.12 A package may not incorporate a feature intended to allow continuous venting during transport.
17.15.13 “Beforedelivery of a package to a carrier for transport, the licensee shall ensure that any special instructions needed to safely open the package have been sent to, or otherwise made available to, the consignee for the consignee's use in accordance with 4.32.5.2.” RH 17.16 Air Transport of Plutonium.
Notwithstanding the provisions of any general licenses and notwithstanding any exemptions stated directly in this part or included indirectly by citation of the U.S. Department of Transportation regulations, as may be applicable, the licensee shall assure that plutonium in any form is not transported by air, or delivered to a carrier for air transport, unless:
17.16.1 The plutonium is contained in a medical device designed for individual human application; or 17.16.2 The plutonium is contained in a material in which the specific activity is not greater than 70 Bq/g (0.002 microcuries per gram) of material and in which the radioactivity is essentially uniformly distributed; or 17.16.3 The plutonium is shipped in a single package containing no more than an A quantity of plutonium in any isotope or form and is shipped in accordance with RH 17.5; or 17.16.4 The plutonium is shipped in a package specifically authorized (in the certificate of compliance issued by the Nuclear Regulatory Commission for that package) for the shipment of plutonium by air and the licensee requires, through special arrangement with the carrier, compliance with 49 CFR 175.704, the U.S. Department of Transportation regulations applicable to the air transport of plutonium.
RH 17.17 Shipment Records.
Each licensee shall maintain, for a period of 2 years after shipment, a record of each shipment of licensed material not exempt under RH 17.4 showing, where applicable:
17.17.1 Identification of the packaging by model number and serial number;
17.17.2 Verification that the packaging, as shipped, had no significant defect;
17.17.3 Volume and identification of coolant;
17.17.4 Type and quantity of licensed material in each package, and the total quantity of each shipment;
17.17.5 Date of the shipment;
17.17.6 Name and address of the transferee;
17.17.7 Address to which the shipment was made; and
17.17.8 Results of the determinations required by RH 17.15 and by the conditions of the package approval.
RH 17.18 Reports.
The licensee shall report to the Department within 30 days:
17.18.1 Any instance in which there is significant reduction in the effectiveness of any packaging during use; and 17.18.2 Details of any defects with safety significance in the packaging after first use, with the means employed to repair the defects and prevent their recurrence; or 17.18.3 Instances in which the conditions of approval in the certificate of compliance were not observed in making a shipment.
RH 17.19 Advance Notification of Transport of Nuclear Waste.
17.19.1 Prior to the transport of any nuclear waste outside of the confines of the licensee's facility or other place of use or storage, or prior to the delivery of any nuclear waste to a carrier for transport, each licensee shall provide advance notification of such transport to the governor, or governor's designee, 4 of each state through which the waste will be transported. 4 A list of the mailing addresses of the governors and governors' designees is available upon request from the Director, Office of State Programs, U.S. Nuclear Regulatory Commission, Washington, D.C. 20555. The list will be published annually in the Federal Register on or about June 30 to reflect any changes in information.
17.19.2 Advance notification is required only when:
17.19.2.1 The nuclear waste is required to be in Type B packaging for transportation;
17.19.2.2 The nuclear waste is being transported into, within, or through, a state enroute to a disposal facility or to a collection point for transport to a disposal facility; and 17.19.2.3 The quantity of licensed material in a single package exceeds any one of the following:
17.19.3 Each advance notification required by RH 17.19.1 shall contain the following information:
17.19.3.1 The name, address, and telephone number of the shipper, carrier, and receiver of the shipment;
17.19.3.2 A description of the nuclear waste contained in the shipment as required by 49 CFR
17.19.3.3 The point of origin of the shipment and the 7-day period during which departure of the shipment is estimated to occur;
17.19.3.4 The 7-day period during which arrival of the shipment at state boundaries is estimated to occur;
17.19.3.5 The destination of the shipment, and the 7-day period during which arrival of the shipment is estimated to occur; and 17.19.3.6 A point of contact with a telephone number for current shipment information.
17.19.4 The notification required by RH 17.19.1 shall be made in writing to the office of each appropriate governor, or governor's designee, and to the Department. A notification delivered by mail must be postmarked at least 7 days before the beginning of the 7-day period during which departure of the shipment is estimated to occur. A notification delivered by messenger must reach the office of the governor, or governor's designee, at least 4 days before the beginning of the 7-day period during which departure of the shipment is estimated to occur. A copy of the notification shall be retained by the licensee for 3 years.
17.19.5 The licensee shall notify each appropriate governor, or governor's designee, and the Department of any changes to schedule information provided pursuant to RH 17.19.1. Such notification shall be by telephone to a responsible individual in the office of the governor, or governor's designee, of the appropriate state or states. The licensee shall maintain for 3 years a record of the name of the individual contacted.
17.19.6 Each licensee who cancels a nuclear waste shipment, for which advance notification has been sent, shall send a cancellation notice to the governor, or governor's designee, of each appropriate state and to the Department. A copy of the notice shall be retained by the licensee for 3 years. Quality Assurance RH 17.20 Quality Assurance Reguirements.
17.20.1 Unless otherwise authorized by the agency, each licensee shall establish, maintain, and execute a quality assurance program to verify by procedures such as checking, auditing, and inspection that deficiencies, deviations, and defective material and equipment relating to the shipment of packages containing radioactive material are promptly identified and corrected.
17.20.2 The licensee shall identify the material and components to be covered by the quality assurance program.
17.20.3 Each licensee shall document the quality assurance program by written procedures or instructions and shall carry out the program in accordance with those procedures throughout the period during which packaging is used.
17.20.4 Prior to the use of any package for the shipment of radioactive material, each licensee shall obtain approval by the Department of its quality assurance program.
17.20.5 The licensee shall maintain sufficient written records to demonstrate compliance with the quality assurance program. Records of quality assurance pertaining to the use of a package for shipment of radioactive material shall be maintained for a period of 3 years after shipment.
17.21 Referenced Materials
17.21.1 This Part 17 of these regulations incorporates by reference material originally published elsewhere. Certified copies of the complete text of incorporated materials referenced are available for public inspection during regular business hours at the radiation control division. Copies of referenced material will be provided at cost upon request. Information regarding how the incorporated material may be obtained or examined is available from: Director, Radiation Control Division (RCD-DO-B1) Colorado Department of Public Health and Environment 4300 Cherry Creek Drive South Denver, Colorado 80222-1530 17.21.2 Any material that has been incorporated by reference may be examined in any state publications depository library. Copies of the incorporated materials have been sent to the state publications depository and distribution center, and are available for interlibrary loan.
17.21.3 Material referenced in this Part 17 of the regulations does not include amendments to or revised editions of the material published later than the effective date of the relevant section. Appendix A to Part 17 - Determination of A and A 1 2 I. Values of A and A for individual radionuclides, which are the bases for many activity limits 1 2 elsewhere in these regulations are given in Table A-1. The curie (Ci) values specified are obtained by converting from the Terabecquerel (TBq) figure. The curie values are expressed to three significant figures to assure that the difference in the TBq and Ci quantities is one tenth of one percent or less. Where values of A or A are unlimited, it is for radiation control purposes only. 1 2 For nuclear criticality safety, some materials are subject to controls placed on fissile material.
II. For individual radionuclides whose identities are known, but which are not listed in Table A-1, the determination of the values of A and A requires Department approval, except that the values 1 2 of A and A in Table A-2 may be used without obtaining Agency approval. 1 2 III. In the calculations of A and A for a radionuclide not in Table A-1, a single radioactive decay 1 2 chain, in which radionuclides are present in their naturally occurring proportions, and in which no daughter nuclide has a half-life either longer than 10 days, or longer than that of the parent nuclide, shall be considered as a single radionuclide, and the activity to be taken into account, and the A or A value to be applied shall be those corresponding to the parent nuclide of that 1 2 chain. In the case of radioactive decay chains in which any daughter nuclide has a half-life either longer than 10 days, or greater than that of the parent nuclide, the parent and those daughter nuclides shall be considered as mixtures of different nuclides.
IV. For mixtures of radionuclides whose identities and respective activities are known, the following conditions apply:
(a) For special form radioactive material, the maximum quantity transported in a Type A package: 1007_1_Part17-Appendix-A_inline1.jpg (b) For normal form radioactive material, the maximum quantity transported in a Type A package: 1007_1_Part17-Appendix-A_inline2.jpg where B(i) is the activity of radionuclide I and A (i) and A (i) are the A and A values for 1 2 1 2 radionuclide respectively.
Alternatively, an A value for mixtures of special form material may be determined as follows: 1007_1_Part17-Appendix-A_inline3.jpg where f(i) is the fraction of activity of nuclide i in the mixture and A (i) is the appropriate A value 1 1 for nuclide i.
V. When the identity of each radionuclide is known, but the individual activities of some of the radionuclides are not known, the radionuclides may be grouped and the lowest A or A value, 1 2 as appropriate, for the radionuclides in each group may be used in applying the formulas in paragraph IV. Groups may be based on the total alpha activity and the total beta/gamma activity when these are known, using the lowest A or A values for the alpha emitters and beta/gamma 1 2 emitters.
Table A-1: A 1 and A 2 Values for Radionuclides Big Table a International shipments of Einsteinium require multilateral approval of A1 and A2 values. Table A-2: General Values for A1 and A2 Contents A 1 (TBq) A 1 (Ci) A 2 (TBq)
Only beta- or gamma- 0.2 5 0.02 emitting nuclides are known to be present.
Alpha-emitting nuclides 0.10 2.70 -5 2 x 10 are known to be present, or no relevant data are available.
Table A-3: Activity-mass Relationships for Uranium Uranium Enrichment* Specific Activity Specific Activity wt % U-235 present . TBq/g Ci/g
0.45 -8 -7
0.72 -8 -7
1.0 -8 -7
1.5 -8 -6
5.0 -7 -6
10.0 -7 -6
20.0 -7 -5
35.0 -7 -5
50.0 -7 -5
90.0 -6 -5
93.0 -6 -5
95.0 -6 -5
* The figures for uranium include representative values for the activity of the uranium-235 which is concentrated during the enrichment process.
PART 18 : LICENSING REQUIREMENTS FOR URANIUM AND THORIUM PROCESSING LICENSING REQUIREMENTS FOR URANIUM AND THORIUM PROCESSING RH 18.1 Purpose and Scope.
18.1.1 The regulations in this part establish criteria, terms and conditions upon which the Department issues licenses to receive title to, receive, possess, use, transfer, or deliver source and byproduct materials, to operate uranium and thorium processing facilities and for the disposition of the resulting byproduct material. The requirements of this part are in addition to, and not in substitution for, other applicable requirements of these regulations.
18.1.2 This part establishes performance objectives and procedural requirements applicable to any uranium or thorium material processing operation, to waste systems for byproduct material as in definition (2) of RH 1.4, and to related activities concerning uranium-bearing and thorium-bearing materials. It establishes specific technical and financial requirements for siting, construction, operation, and decontamination, reclamation and ultimate stabilization, as well as requirements for license transfer and termination, long-term site monitoring and surveillance, and ownership and ultimate custody of source material milling facilities and byproduct material impoundments.
18.1.3 The requirements of this part apply to byproduct material that is located at a site where milling operations are no longer active, if such site is not covered by the remedial action program of Title I of the Uranium Mill Tailings Radiation Control Act (UMTRCA) OF 1978 (92 STAT. 3021; 42 U.S.C. 7901). The regulations in this part do not establish procedures and criteria for the issuance of licenses for materials covered under Title I of the Uranium Mill Tailings Radiation Control Act of 1978 (92 Stat. 3021) unless that program fails to accomplish remedial action. Disposal at a uranium or thorium processing site of radioactive material which is not type 2 byproduct material must not inhibit reclamation of the tailings impoundment or the ability of the U.S. Government to take title to the impoundment as long-term custodian. RH 18.2 As used in this regulation:
“Active maintenance” means any significant activity needed during the period of long term care including ongoing activities such as the pumping and treatment of water from a site or one-time measures such as replacement of a disposal site's cover. Active maintenance does not include custodial activities such as repair of fencing, repair or replacement of monitoring equipment, revegetation, minor additions to soil cover, minor repair of disposal site cover, and general disposal site upkeep such as mowing grass.
“Aquifer” means a geologic formation, group of formations, or part of a formation capable of yielding a significant amount of ground water to wells or springs. Any saturated zone created by uranium or thorium operations would not be considered an aquifer unless the zone is or potentially is:
(1) hydraulically interconnected to a natural aquifer;
(2) capable of discharge to surface water; or (3) reasonably accessible because of migration beyond the vertical projection of the boundary of the land transferred for long-term government ownership and care in accordance with Criterion 9 of Appendix A to this Part 18.
“As expeditiously as practicable considering technological feasibility” , for the purposes of Criterion 6A, means as quickly as possible considering: the physical characteristics of the tailings and the site; the limits of available technology; the need for consistency with mandatory requirements of other regulatory programs; and factors beyond the control of the licensee. The phrase permits consideration of the cost of compliance only to the extent specifically provided for by use of the term available technology.
“Available radon barrier technology” means technologies and methods for emplacing a final radon barrier on uranium mill tailings piles or impoundments. This term shall not be construed to include extraordinary measures or techniques that would impose costs that are grossly excessive as measured by practice within the industry (or one that is reasonably analogous), (such as, by way of illustration only, unreasonable overtime, staffing, or transportation requirements, etc., considering normal practice in the industry; laser fusion of soils, etc.), provided there is reasonable progress toward emplacement of the final radon barrier. To determine grossly excessive costs, the relevant baseline against which cost shall be compared is the cost estimate for tailings impoundment closure contained in the licensee's approved reclamation plan, but costs beyond these estimates shall not automatically be considered grossly excessive. “Closure” means the activities following operations to decontaminate and decommission the buildings and site used to produce byproduct materials and reclaim the tailings and/or waste disposal area.
“Closure plan” means the Department approved plan to accomplish closure. “Compliance period” begins when the Department sets secondary ground-water protection standards and ends when the owner or operator's license is terminated and the site is transferred to the State or Federal agency for long-term care.
“Dike” means an embankment or ridge of either natural or man-made materials used to prevent the movement of liquids, sludges, solids, or other materials. “Disposal area” means the area containing byproduct materials to which the requirements of Criterion 6 of Appendix A to this Part 18 apply.
“Disposal site” means all land that is subject to transfer to a government agency after termination of the license.
“Existing portion” means that land surface area of an existing surface impoundment on which significant quantities of uranium or thorium byproduct materials had been placed prior to September 30, 1983.
“Factors beyond the control of the licensee” means factors proximately causing delay in meeting the schedule in the applicable reclamation plan for the timely emplacement of the final radon barrier notwithstanding the good faith efforts of the licensee to complete the barrier in compliance with paragraph (1) of Criterion 6A. These factors may include, but are not limited to:
(1) physical conditions at the site;
(2) inclement weather or climatic conditions;
(3) an act of god;
(4) an act of war;
(5) a judicial or administrative order or decision, or change to the statutory, regulatory, or other legal requirements applicable to the licensee's facility that would preclude or delay the performance of activities required for compliance;
(6) labor disturbances;
(7) any modifications, cessation or delay ordered by state, federal, or local agencies;
(8) delays beyond the time reasonably required in obtaining necessary government permits, licenses, approvals, or consent for activities described in the reclamation plan proposed by the licensee that result from agency failure to take final action after the licensee has made a good faith, timely effort to submit legally sufficient applications, responses to requests (including relevant data requested by the agencies), or other information, including approval of the reclamation plan; and (9) an act or omission of any third party over whom the licensee has no control. “Final radon barrier” means the earthen cover (or approved alternative cover) over tailings or waste constructed to comply with Criterion 6 of this Appendix (excluding erosion protection features).
“Ground water” means water below the land surface in a zone of saturation. For purposes of Appendix A to this Part 18, ground water is the water contained within an aquifer as defined above.
“Leachate” means any liquid, including any suspended or dissolved components in the liquid that has percolated through or drained from the byproduct material. “Licensed site” means the area contained within the boundary of a location under the control of persons generating or storing radioactive materials under a Department license. “Liner” means a continuous layer of natural or man-made materials, beneath or on the sides of a surface impoundment, which restricts the downward or lateral escape of byproduct material, hazardous constituents, or leachate.
“Long term care” means the observation and maintenance of a site following the postclosure period and termination of the license.
“Milestone” means an action or event that is required to occur by an enforceable date. “Monitoring” means observing and making measurements to provide data to evaluate the performance and characteristics of a site.
“Operation” means that a uranium or thorium mill tailings pile or impoundment is being used for the continued placement of byproduct material or is in standby status for such placement. A pile or impoundment is in operation from the day that byproduct material is first placed in the pile or impoundment until the day final closure begins.
“Point of compliance” is the site specific location in the uppermost aquifer where the ground- water protection standard must be met.
“Postclosure” means the period of time from completion of the site closure plan for decontamination, reclamation, and stabilization of the site and disposal area and prior to the termination of the license.
“Reclamation plan” , for the purposes of Criterion 6A of Appendix A of this Part 18, means the plan detailing activities to accomplish reclamation of the tailings or waste disposal area in accordance with the technical criteria of Appendix A of this Part. The reclamation plan must include a schedule for reclamation milestones that are key to the completion of the final radon barrier including as appropriate, but not limited to, wind blown tailings retrieval and placement on the pile, interim stabilization (including dewatering or the removal of freestanding liquids and recontouring), and final radon barrier construction. (Reclamation of tailings must also be addressed in the closure plan; the detailed reclamation plan may be incorporated into the closure plan.)
“Surface impoundment” means a natural topographic depression, man-made excavation, or diked area, which is designed to hold an accumulation of liquid wastes or wastes containing free liquids, and which is not an injection well.
“Surveillance” means the observation of the site for the purposes of visual detection of the need for maintenance, custodial care, evidence of unauthorized access, and compliance with other license and regulatory requirements.
“Third-party contractor” or “Third-party agreement” means a legal or contractual mechanism whereby an applicant or licensee voluntarily agrees to pay for the services, solely selected and supervised by the Department, of qualified persons not Department staff nor under contract directly to the Department.
“Uppermost aquifer” means the geologic formation nearest the natural ground surface that is an aquifer, as well as lower aquifers that are hydraulically interconnected with this aquifer within the facility's property boundary.
RH 18.3 Special Requirements for Issuance of Specific Licenses For Source Material Milling. In addition to the requirements set forth in RH 3.8 and 3.9, a specific license for source material milling will be issued if the applicant submits to the Department a complete and accurate application that clearly demonstrates how objectives and requirements of this Part are met. Failure to clearly so demonstrate shall be grounds for refusing to accept an application.
18.3.1 An application for a license or to amend or renew an existing license to receive, possess, and use source material for milling or byproduct material as in definition (2) of RH 1.4 shall include all information required under these regulations and such other information as the Department may deem necessary, and shall address the following:
18.3.1.1 Description of the proposed project or action;
18.3.1.2 Area/site characteristics including geology, topography, hydrology and meteorology;
18.3.1.3 Radiological and nonradiological impacts of the proposed project or action, including waterway and groundwater impacts;
18.3.1.4 Environmental effects of accidents;
18.3.1.5 Tailings disposal and decommissioning;
18.3.1.6 Site and project alternatives.
18.3.2 The applicant shall provide procedures describing the means employed to meet the following requirements during the operational phase of any project.
18.3.2.1 Milling operations shall be conducted so that all releases are reduced to as low as is reasonably achievable below the limits of Part 4.
18.3.2.2 The mill operator shall conduct at least daily inspection of any tailings or waste retention systems. The inspection shall be performed by a person who is qualified and approved by the Department. Records of such inspections shall be maintained for review by the Department.
18.3.2.3 The mill operator shall immediately notify the Department of the following:
18.3.3 During any one full year prior to any major site construction, the applicant/licensee shall conduct a preoperational monitoring program to provide complete baseline data on a milling site and its environs. Throughout the construction and operating phases of the mill, the applicant/licensee shall conduct an operational monitoring program to measure or evaluate compliance with applicable standards and regulations, to evaluate performance of control systems and procedures, to evaluate environmental impacts of operation, and to detect potential long-term effects.
18.3.4 The environmental report required by RH 3.8.8 shall contain all information deemed necessary by the agency to assist the agency in the evaluation of the short-term and long-range environmental impact of the project and activity so that the agency may weigh environmental, economic, technical, and other benefits against environmental costs, while considering available alternatives. The environmental report shall be submitted nine (9) months prior to the anticipated commencement of construction unless an exemption as provided by RH 3.8.7.1 has been obtained from the Department.
18.3.5 The following types of actions require an applicant's environmental report:
i. Issuance or renewal of a source material milling license;
ii. Issuance of an amendment that would authorize or result in:
18.3.6 An application for a license to receive, possess and use source material for milling or byproduct material as in definition (2) of RH 1.4 shall contain proposed specifications relating to the milling operations and the disposition of tailings or wastes resulting from such milling activities to achieve the requirements and objectives set forth in the criteria listed in Appendix A to this Part 18. Each application for a new license or for license renewal must clearly demonstrate how the requirements and objectives set forth in Appendix A to this Part 18 have been addressed. Failure to clearly demonstrate how the requirements and objectives in Appendix A to this Part 18 have been addressed shall be grounds for refusing to accept an application. RH 18.4 Environmental Impact Analysis 18.4.1 For each license application or application to amend or renew an existing license to receive, possess, or use source material for uranium or thorium milling or byproduct material as in definition (2) of RH 1.4 which will have a significant impact on the environment, the Department shall prepare a written analysis of the impact of the licensed activity on the environment, which shall be available to the public and for review by the U.S. Nuclear Regulatory Commission at the time of public notice of hearing, which analysis shall include:
18.4.1.1 An assessment of the radiological and nonradiological impacts to the public health;
18.4.1.2 An assessment of any impact on any waterway and ground water;
18.4.1.3 Consideration of alternatives to the activities to be conducted; and
18.4.1.4 Consideration of the long-term impacts of the licensed activities.
18.4.2 In preparing the environmental impact analysis, the Department may use and incorporate by reference the environmental report prepared by the applicant as required by RH 3.8.8 and environmental assessments prepared by Federal, State or local agencies.
18.4.3 The environmental impact analysis, or any part thereof, shall be prepared directly by the Department or the Department shall utilize the third party method set forth in RH 3.13. RH 18.5 Prior to issuance of the license, the applicant shall (1) establish financial assurance arrangements, as provided by RH 3.9.5, to ensure decontamination and decommissioning of the facility and (2) provide a fund adequate to cover the payment of the cost for long-term care and monitoring as provided by RH 3.9.5.10. Such fund shall be sufficient to meet the requirements of RH 3.9.5.10.4. The Department will consider proposals to combine the two types of financial assurance. Financial assurance shall be provided prior to commencement of construction or operation. RH 18.6 License Hearings 18.6.1 There shall be an opportunity for public hearings to be held in accordance with the procedures in 24-4-104 and 24-4-105, C.R.S. 1973, as amended, and RH 18.6, prior to the granting, denial or renewal of a specific license permitting the receipt, possession or use of source material for milling or byproduct material as in definition (2) of RH 1.4.
18.6.2 Notice of Hearing
18.6.2.1 All hearings shall be preceded by written notice containing:
18.6.2.2 The notice of the hearing shall be mailed by the Department to the licensee or applicant and to each person who has filed a written request to receive notice of such proceedings. The licensee or applicant shall cause the notice to be published for three (3) days in a newspaper of statewide circulation and in local newspapers designated by the Department in the area to be affected by the proposed action. The notice shall be mailed and published not less than ninety (90) days prior to the hearing.
18.6.2.3 The time and place of hearing will be fixed with due regard for the convenience of the parties or their representatives, and the public interest. The hearing will be held in the locale of the site to be licensed.
18.6.2.4 The cost of any licensing action hearing shall be at the expense of the applicant. These costs shall include, but not be limited to, the hearing officer, the meeting room, the court reporter and transcript copies, and the required notices. The costs shall not include the expenses of other parties to the hearing.
18.6.3 Party Status
18.6.3.1 A person who may be affected or aggrieved by Department action may apply for party status not less than twenty (20) days prior to the hearing. Thereafter, application to be made a party shall not be considered except upon motion for good cause shown.
18.6.3.2 Application for party status must identify the individual or group applying, including the address or phone number where they may be contacted, state the nature of their interest in the hearing and the specific ground on which they claim to be affected or aggrieved, and the specific aspects of the hearing which they wish to address.
18.6.3.3 The Department, or the hearing officer, will grant or deny party status within five (5) days after receipt of the request for party status based on the nature and extent of the person's property, financial or other interest in the hearing and the possible effect of any order which may be entered as a result of the hearing on the person's interest. Any person applying for or granted party status may, by motion to the hearing officer or Department, as appropriate, challenge the right of any other person to be a party.
18.6.3.4 Parties shall have the right to initiate discovery. Parties shall have the right to make motions or objections, present evidence, cross-examine witnesses, and appeal from the decision of the hearing as provided by the Colorado Administrative Procedures Act, 24-4- 101 et seq. , C.R.S. 1973, as amended.
18.6.3.5 A person who is not a party will be permitted to submit written comments to the Department and may be permitted to make an oral presentation at the hearing, but will not have the other rights of a party.
18.6.4 Prehearing Conference
18.6.4.1 The Department or hearing officer, on its own motion or at the request of any party or any person who has applied to become a party, may direct the parties to appear at a specific time and place for a conference to consider:
18.6.4.2 At such conference each party or person who has applied to become a party shall present to every other person, party, and the Department a prehearing statement containing the following:
18.6.4.3 Except for good cause shown or for evidence or testimony accepted as rebuttal, no witness may testify nor may any exhibits be introduced on behalf of a party who had notice of the prehearing conference unless such witness has been previously listed and/or his written testimony and related exhibits have been presented to opposing parties at the prehearing conference.
18.6.4.4 The Department or hearing officer shall issue a written summary of the action taken at the conference and agreements by the parties, which limits the issues or defines the matters in controversy to be determined in the hearing.
18.6.5 Discovery
18.6.5.1 Any party may initiate discovery in the form of interrogatories to another party, requests for admission to another party, requests for production of documents to another party, or depositions of any persons, or any combination thereof. The Colorado Rules of Civil Procedure, to the extent not inconsistent with the Colorado Administrative Procedure Act, shall apply. Such discovery may be modified by a motion for protective order filed with the Department or hearing officer within seven (7) days of receipt of the notice or request for discovery. Motions for protective order shall set forth the grounds in support thereof and shall be ruled upon immediately. Discovery shall be completed no later than ten (10) days preceding the hearing date, except as otherwise ordered by the Department or hearing officer.
18.6.6 Conduct of Hearings
18.6.6.1 Hearing presentations will proceed in the following order unless otherwise directed by the Department or hearing officer.
18.6.6.2 Public participation as provided for in these rules shall be allowed at that time or times during the hearing as determined by the Department or hearing officer in their discretion to be appropriate.
18.6.6.3 At the conclusion of any witness's testimony, or at the conclusion of the party's entire presentation, as may be determined by the Department or hearing officer, all parties may then cross-examine such witness or witnesses. The Department or hearing officer may examine and cross-examine any witness. A person who is not a party shall not have the right to cross-examine.
18.6.6.4 Any person, not a party to the proceeding, wishing to present testimony may do so by indicating his desire in writing. A form will be available prior to and during the hearing. This form will request the person's name, address, whom he represents, the general nature of his testimony, and the time required for his presentation. This form is to be presented to a representative of the Department during the hearing. Voluntary testimony not specifically requested on or by the written form may also be allowed. Any person presenting testimony shall be under oath and be subject to cross examination.
18.6.6.5 The proponent of any motion, order, or license issuance bears the burden of proof.
18.6.6.6 No interested person, party, or applicant for party status outside the Department will have any oral or written communication with any Department personnel or hearing officer relevant to the merits of a hearing pending before the Department unless reasonable prior notice is given to all participants in the hearing. This prohibition shall apply after the hearing is noticed. Any Department employee or hearing officer who is involved in such a prohibited communication shall make a written record of it and transmit it to all the parties to the hearing.
18.6.7 Department Decision
18.6.7.1 Any party to a hearing may, or if so directed by the Department or the hearing officer shall, file proposed findings of fact and conclusions of law and a proposed form of order or decision within twenty (20) days after the record is closed. A party who has the burden of proof may reply within ten (10) days after service of proposed findings of fact and conclusions of law.
18.6.7.2 After due consideration of the hearing record, the Department or hearing officer shall issue its findings of fact, conclusions of law, and decision and order. RH 18.7 Operational Requirements.
Each licensee authorized to receive, possess or use source material for milling or byproduct material as in definition (2) of RH 1.4 shall:
18.7.1 Operate in accordance with the requirements of this Part 18, in particular the procedures required by RH 18.3.2, monitoring required by 18.3.3, and the requirements and objectives of Appendix A to this Part 18.
18.7.2 Submit a report to the Department within 60 days after January 1 and July 1 of each year, specifying the quantity of each of the radioactive materials released to unrestricted areas in liquid and in gaseous effluents during the previous six months of operation, and such other information as the Department may require to estimate maximum potential annual radiation doses to the public resulting from effluent releases. If quantities of radioactive materials released during the reporting period are significantly above the licensee's design objectives previously reviewed as part of the licensing action, the report shall cover this specifically. On the basis of such reports and any additional information the Department may obtain from the licensee or others, the Department may from time to time require the licensee to take such action as the Department deems appropriate.
RH 18.8 Decommissioning Requirements.
18.8.1 In addition to the information required under RH 3.16, each licensee authorized to receive, possess or use source material for milling or byproduct material as in definition (2) of RH 1.4 shall submit a plan for completion of decommissioning if the procedures necessary to carry out decommissioning:
18.8.1.1 Have not been previously approved by the Department; and
18.8.1.2 Could increase potential health and safety impacts to workers or to the public, such as in any of the following cases:
18.8.2 Procedures with potential health and safety impacts may not be carried out prior to approva of the decommissioning plan.
18.8.3 The proposed decommissioning plan, if required by RH 18.8.1 or by license condition, must include:
18.8.3.1 Description of planned decommissioning activities;
18.8.3.2 Description of methods used to assure protection of workers and the environment against radiation hazards during decommissioning;
18.8.3.3 A description of the planned final radiation survey; and
18.8.3.4 An updated detailed cost estimate for decommissioning, comparison of that estimate with present funds set aside for decommissioning, and plan for assuring the availability of adequate funds for completion of decommissioning.
18.8.4 The proposed decommissioning plan will be approved by the Department if the information therein demonstrates that the decommissioning will be completed as soon as is reasonable and that the health and safety of workers and the public will be adequately protected.
18.8.5 Upon approval of the decommissioning plan by the Department, the licensee shall complete decommissioning in accordance with the approved plan. As a final step in decommissioning, the licensee shall submit the information required in RH 3.16.4.1.5 and shall certify the disposition of accumulated wastes from decommissioning.
18.8.6 If the information submitted under RH 3.16.4.1.5 or 18.8 does not adequately demonstrate that the premises are suitable for release for unrestricted use, the Department will inform the licensee of the appropriate further actions required for termination of license. PART 18 , APPENDIX A CRITERIA RELATING TO THE OPERATION OF MILLS AND THE DISPOSITION OF THE TAILINGS OR WASTES FROM THESE OPERATIONS Introduction: Every applicant for a license to possess and use radioactive material in conjunction with uranium or thorium milling, or byproduct material at sites formerly associated with such milling, is required by the provisions of RH 18.3 to include in a license application proposed specifications relating to milling operations and the disposition of tailings or wastes resulting from such milling activities. This appendix establishes technical, ownership, and long-term site surveillance criteria relating to the siting, operation, decontamination, decommissioning, and reclamation of mills and tailings or waste systems and sites at which such mills and systems are located.
As used in this appendix, the term “as low as is reasonably achievable” has the same meaning as in RH 1.4.
In many cases, flexibility is provided in the criteria to allow achieving an optimum tailings disposal program on a site-specific basis. However, in such cases the objectives, technical alternatives and concerns which must be taken into account in developing a tailings program are identified. As provided by the provisions of RH 18.3, applications for licenses must clearly demonstrate how the criteria have been addressed.
The specifications shall be developed considering the expected full capacity of tailings or waste systems and the lifetime of mill operations. Where later expansions of systems or operations may be likely (for example, where large quantities of ore now marginally uneconomical may be stockpiled), the amenability of the disposal system to accommodate increased capacities without degradation in long-term stability and other performance factors shall be evaluated.
Licensees or applicants may propose to the Department alternatives to meet the specific requirements in this Appendix. The alternative proposals may take into account local or regional conditions, including geology, topography, hydrology, and meteorology. The Department may find that the proposed alternatives meet the Department's requirements if the alternatives will achieve a level of stabilization and containment of the sites concerned and a level of protection for public health, safety, and the environment from radiological and nonradiological hazards associated with the site, which is equivalent to, to the extent practicable, or more stringent than the level which would be achieved by the requirements of this Appendix and the standards promulgated by the Environmental Protection Agency in 40 CFR Part 192, Subparts D and E. Proposed alternatives to specific regulations in this Part 18 require notice and opportunity for hearing before the U.S. Nuclear Regulatory Commission. All site-specific licensing decisions based on the criteria in this Appendix or alternatives proposed by licensees or applicants will take into account the risk to the public health and safety and the environment with due consideration to the economic costs involved and any other factors the Department determines to be appropriate. In implementing this Appendix, the Department will consider “practicable” and “reasonably achievable” as equivalent terms. Decisions involving these terms will take into account the state of technology. and the economics of improvements in relation to benefits to the public health and safety, and other societal and socioeconomic considerations, and in relation to the utilization of atomic energy in the public interest.
Criterion 1.
Criterion 1A. The general goal or broad objective in siting and design decisions is permanent isolation of tailings and associated contaminants by minimizing disturbance and dispersion by natural forces, and to do so without ongoing maintenance. For practical reasons, specific siting decisions and design standards must involve finite times (e.g., the longevity design standard in Criterion 6). The following site features which will contribute to such a goal or objective must be considered in selecting among alternative tailings disposal sites or judging the adequacy of existing tailings sites:
(1) Remoteness from populated areas;
(2) Hydrologic and other natural conditions as they contribute to continued immobilization and isolation of contaminants from ground-water sources; and (3) Potential for minimizing erosion, disturbance, and dispersion by natural forces over the longterm. Criterion 1B. The site selection process must be an optimization to the maximum extent reasonably achievable in terms of the features in Criterion 1A.
Criterion 1C. In the selection of disposal sites, primary emphasis must be given to isolation of tailings or wastes, a matter having long-term impacts, as opposed to consideration only of short-term convenience or benefits, such as minimization of transportation or land acquisition costs. While isolation of tailings will be a function of both site and engineering design, overriding consideration must be given to siting features given the long-term nature of the tailings hazards. Criterion 1D. Tailings should be disposed of in a manner that no active maintenance is required to preserve conditions of the site.
Criterion 2.
To avoid proliferation of small waste disposal sites and thereby reduce perpetual surveillance obligations, byproduct material as in definition (2) of RH 1.4, from in situ extraction operations, such as residues from solution evaporation or contaminated control processes, and wastes from small remote above ground extraction operations shall be disposed of at existing large mill tailings disposal sites; unless considering the nature of the wastes, such as their volume and specific activity and the costs and environmental impacts of transporting the wastes to a large disposal site, such offsite disposal is demonstrated to be impracticable or the advantages of onsite burial clearly outweigh the benefits of reducing the perpetual surveillance obligations.
Criterion 3.
The “prime option” for disposal of tailings is placement below grade, either in mines or specially excavated pits (that is, where the need for any specially constructed retention structure is eliminated). The evaluation of alternative sites and disposal methods performed by mill operators in support of their proposed tailings disposal program (provided in applicants' environmental reports) must reflect serious consideration of this disposal mode. In some instances, below grade disposal may not be the most environmentally sound approach, such as might be the case if a ground-water formation is relatively close to the surface or not very well isolated by overlying soils and rock. Also, geologic and topographic conditions might make full below grade burial impracticable: For example, bedrock may be sufficiently near the surface that blasting would be required to excavate a disposal pit at excessive cost, and more suitable alternative sites are not available. Where full below grade burial is not practicable, the size of retention structures, and size and steepness of slopes associated with exposed embankments must be minimized by excavation to the maximum extent reasonably achievable or appropriate given the geologic and hydrologic conditions at a site. In these cases, it must be demonstrated that an above grade disposal program will provide reasonably equivalent isolation of the tailings from natural erosional forces. Criterion 4.
The following site and design criteria must be adhered to whether tailings or wastes are disposed of above or below grade.
Criterion 4A. Upstream rainfall catchment areas must be minimized to decrease erosion potential and the size of the floods, which could erode or wash out sections of the tailings disposal area. Criterion 4B. Topographic features should provide good wind protection. Criterion 4C. Embankment and cover slopes must be relatively flat after final stabilization to minimize erosion potential and to provide conservative factors of safety assuring long-term stability. The broad objective should be to contour final slopes to grades which are as close as possible to those which would be provided if tailings were disposed of below grade: this could, for example, lead to slopes of about 10 horizontal to 1 vertical (10h:1v) or less steep. In general, slopes should not be steeper than about 5h:1v. Where steeper slopes are proposed, reasons why a slope less steep than 5h:1v would be impracticable should be provided and compensating factors and conditions, which make such slopes acceptable, should be identified.
Criterion 4D. A full self-sustaining vegetative cover must be established or rock cover employed to reduce wind and water erosion to negligible levels.
(1) Where a full vegetative cover is not likely to be self-sustaining due to climatic or other conditions, such as in semi-arid and arid regions, rock cover must be employed on slopes of the impoundment system. The Department will consider relaxing this requirement for extremely gentle slopes such as those, which may exist on the top of the pile.
(2) The following factors must be considered in establishing the final rock cover design to avoid displacement of rock particles by human and animal traffic or by natural process, and to preclude undercutting and piping:
(a) Shape, size, composition, and gradation of rock particles (excepting bedding material average particles size must be at least cobble size or greater);
(b) Rock cover thickness and zoning of particles by size; and (c) Steepness of underlying slopes.
(3) Individual rock fragments must be dense, sound, and resistant to abrasion, and must be free from cracks, seams, and other defects that would tend to unduly increase their destruction by water and frost actions. Weak, friable, or laminated aggregate may not be used.
(4) Rock covering of slopes may be unnecessary where top covers are very thick (on the order of 10m or greater); impoundment slopes are very gentle (on the order of 10h:1v or less); bulk cover materials have inherently favorable erosion resistance characteristics; and, there is negligible drainage catchment area upstream of the pile and good wind protection as described in Criteria 4A and 4B.
(5) Furthermore, all impoundment surfaces must be contoured to avoid areas of concentrated surface runoff or abrupt or sharp changes in slope gradient. In addition to rock cover on slopes, areas toward which surface runoff might be directed must be well protected with substantial rock cover (rip rap). In addition to providing for stability of the impoundment system itself, overall stability, erosion potential, and geomorphology of surrounding terrain must be evaluated to assure that there are not ongoing or potential processes, such as gully erosion, which would lead to impoundment instability.
Criterion 4E. The impoundment may not be located near a capable fault that could cause a maximum credible earthquake larger than that which the impoundment could reasonably be expected to withstand. As used in this criterion, the term “capable fault” has the same meaning as defined in section III(g) of Appendix A of 10 CFR Part 100. The term “maximum credible earthquake” means that earthquake which would cause the maximum vibratory ground motion based upon an evaluation of earthquake potential considering the regional and local geology and seismology and specific characteristics of local subsurface material.
Criterion 4F. The impoundment, where feasible, should be designed to incorporate features, which will promote deposition. For example, design features, which promote deposition of sediment suspended in any runoff, which flows into the impoundment area, might be utilized; the object of such a design feature would be to enhance the thickness of cover over time.
Criterion 5.
Criteria 5A-5D and Criterion 10 incorporate the basic ground-water protection standards imposed by the Environmental Protection Agency in 40 CFR Part 192, Subparts D and E (48 FR 45926; October 7, 1983) which apply during operations and prior to the end of closure. Groundwater monitoring to comply with these standards is required by Criterion 7A.
Criterion 5A.
(1) The primary ground-water protection standard is a design standard for surface impoundments used to manage byproduct material. Unless exempted under paragraph 5A(3) of this criterion, surface impoundments (except for an existing portion) shall have a liner that is designed, constructed, and installed to prevent any migration of wastes out of the impoundment to the adjacent subsurface soil, ground water, or surface water at any time during the active life (including the closure period) of the impoundment. The liner may be constructed of materials that may allow wastes to migrate into the liner (but not into the adjacent subsurface soil, ground water, or surface water) during the active life of the facility, provided that impoundment closure includes removal or decontamination of all waste residues, contaminated containment system components (liners, etc.) contaminated subsoils, and structures and equipment contaminated with waste and leachate. For impoundments that will be closed with the liner material left in place, the liner must be constructed of materials that can prevent wastes from migrating into the liner during the active life of the facility.
(2) The liner required by paragraph 5A(1) above shall be:
(a) Constructed of materials that have appropriate chemical properties and sufficient strength and thickness to prevent failure due to pressure gradients (including static head and external hydrogeologic forces), physical contact with the waste or leachate to which they are exposed, climatic conditions, the stress of installation, and the stress of daily operation;
(b) Placed upon a foundation or base capable of providing support to the liner and resistance to pressure gradients above and below the liner to prevent failure of the liner due to settlement, compression, or uplift; and (c) Installed to cover all surrounding earth likely to be in contact with the wastes or leachate.
(3) The applicant or licensee will be exempted from the requirements of paragraph 5A(1) of this criterion if the Department finds, based on a demonstration by the applicant or licensee, that alternate design and operating practices, including the closure plan, together with site characteristics will prevent the migration of any hazardous constituents into ground water or surface water at any future time.
In deciding whether to grant an exemption, the Department will consider:
(a) The nature and quantity of the wastes;
(b) The proposed alternate design and operation;
(c) The hydrogeologic setting of the facility, including the attenuative capacity and thickness of the liners and soils present between the impoundment and ground water or surface water; and (d) All other factors which would influence the quality and mobility of the leachate produced and the potential for it to migrate to ground water or surface water.
(4) A surface impoundment must be designed, constructed, maintained, and operated to prevent overtopping resulting from normal or abnormal operations, overfilling, wind and wave actions, rainfall, or run-on; from malfunctions of level controllers, alarms, and other equipment; and from human error.
(5) When dikes are used to form the surface impoundment, the dikes must be designed, constructed, and maintained with sufficient structural integrity to prevent massive failure of the dikes. In ensuring structural integrity, it must not be presumed that the liner system will function without leakage during the active life of the impoundment.
Criterion 5B.
(1) Uranium and thorium byproduct material in definition (2) of RH 1.4 shall be managed to conform to the following secondary ground-water protection standard: hazardous constituents entering the ground water from a licensed site must not exceed the specified concentration limits in the uppermost aquifer beyond the point of compliance during the compliance period. Hazardous constituents are those constituents identified by the Department pursuant to paragraph 5B(2) of this criterion. Specified concentration limits are those limits established by the Department as indicated in paragraph 5B(5) of this criterion. The Department will also establish the point of compliance and compliance period on a site-specific basis through license conditions and orders. The objective in selecting the point of compliance is to provide the earliest practicable warning that the impoundment is releasing hazardous constituents to the ground water. The point of compliance must be selected to provide prompt indication of ground-water contamination on the hydraulically downgradient edge of the disposal area. The Department shall identify hazardous constituents, establish concentration limits, set the compliance period, and may adjust the point of compliance if needed to accord with developed data and site information as to the flow of ground water or contaminants, when the detection monitoring established under Criterion 7A indicates leakage of hazardous constituents from the disposal area.
(2) A constituent becomes a hazardous constituent subject to paragraph 5B(5) only when the constituent meets all three of the following tests:
(a) The constituent is reasonably expected to be in or derived from the uranium and thorium byproduct material in the disposal area;
(b) The constituent has been detected in the ground water in the uppermost aquifer; and (c) The constituent is listed in Criterion 10 of this appendix.
(3) Even when constituents meet all three tests in paragraph 5B(2) of this criterion, the Department may exclude a detected constituent from the set of hazardous constituents on a site-specific basis if it finds that the constituent is not capable of posing a substantial present or potential hazard to human health or the environment. In deciding whether to exclude constituents, the Department will consider the following:
(a) Potential adverse effects on ground-water quality, considering
(b) Potential adverse effects on hydraulically-connected surface waterquality, considering
(4) In making any determinations under paragraphs 5B(3) and 5B(6) of this criterion about the use of ground water in the area around the facility, the Department will consider any identification of underground sources of drinking water and exempted aquifers made by the Colorado Water Quality Control Commission, as in 5 CCR 1002-8, or other agency having jurisdiction.
(5) At the point of compliance, the concentration of a hazardous constituent must not exceed:
(a) The Department-approved background concentration of that constituent in the ground water;
(b) The respective value given in the table in paragraph 5C if the constituent is listed in the table and if the background level of the constituent is below the value listed; or (c) An alternate concentration limit established by the Department.
(6) Conceptually, background concentrations pose no incremental hazards and the drinking water limits in Criterion 5C state acceptable hazards but these two options may not be practically achievable at a specific site. Alternate concentration limits that present no significant hazard may be proposed by licensees for Department consideration. Licensees must provide the basis for any proposed limits including consideration of practicable corrective actions, that limits are as low as reasonably achievable, and information on the factors the Department must consider. The Department will establish a site specific alternate concentration limit for a hazardous constituent as provided in paragraph 5B(5) of this criterion if it finds that the proposed limit is as low as reasonably achievable after considering practicable corrective actions, and that the constituent will not pose a substantial present or potential hazard to human health or the environment as long as the alternate concentration limit is not exceeded. In making the present and potential hazard finding, the Department will consider the following factors:
(a) Potential adverse effects on ground water quality, considering:
(b) Potential adverse effects on hydraulically-connected surface water quality, considering:
Maximum Values for Ground Water Protection Constituent or property Maximum Concentration (Milligrams per liter):
Arsenic 0.05 Barium 1.0 Cadmium 0.01 Chromium 0.05 Lead 0.05 Mercury 0.002 Selenium 0.01 Silver 0.05 Endrin (1,2,3,4,10, 10- 0.0002 hexachloro-1,7-expoxy- 1,4,4a,5,6,7,8, 9a- octahydro-1, 4-endo, endo-5, 8-dimethano naphthalene)
Lindane (1,2,3,4,5,6- 0.004 hexachloro-cyclohexane, gamma isomer)
Methoxychlor (1,1,1- 0.1 Trichloro-2, 2-bis, p- methoxyphenylethane)
Toxaphene (C 10 H 10 Cl 0.005 6 , Technical chlorinated camphene, 67–69 percent chlorine)
2,4-D (2,4- 0.1 Dichlorophenoxyacetic acid)
2,4,5-TP Silvex (2,4,5- 0.01 Trichloro- phenoxypropionic acid)
. Becquerels per liter PicoCuries per liter:
Combined radium-226 0.185 5 and radium-228 Gross alpha-particle 0.555 15 activity (excluding radon and uranium when producing uranium byproduct material or radon and thorium when producing thorium byproduct material)
Criterion 5D. If the ground water protection standards established under paragraph 5B(1) of this criterion are exceeded at a licensed site, a corrective action program must be put into operation as soon as is practicable, and in no event later than eighteen (18) months after the Department finds that the standards have been exceeded. The licensee shall submit the proposed corrective action program and supporting rationale for Department approval prior to putting the program into operation, unless otherwise directed by the Department. The objective of the program is to return hazardous constituent concentration levels in ground water to the concentration limits set as standards. The licensee's proposed program shall address removing the hazardous constituents that have entered the ground water at the point of compliance or treating then in place. The program shall also address removing or treating in place any hazardous constituents that exceed concentration limits in ground water between the point of compliance and the downgradient facility property boundary. The licensee shall continue corrective action measures to the extent necessary to achieve and maintain compliance with the ground water protection standard. The Department will determine when the licensee may terminate corrective action measures based on data from the ground water monitoring program and other information that provide reasonable assurance that the ground water protection standard will not be exceeded. Criterion 5E. In developing and conducting ground water protection programs, applicants and licensees shall also consider the following:
(1) Installation of bottom liners (Where synthetic liners are used, a leakage detection system must be installed immediately below the liner to ensure major failures are detected if they occur. This is in addition to the ground water monitoring program conducted as provided in Criterion 7. Where clay liners are proposed or relatively thin, in situ clay soils are to be relied upon for seepage control, tests must be conducted with representative tailings solutions and clay materials to confirm that no significant deterioration of permeability or stability properties will occur with continuous exposure of clay to tailings solutions. Tests must be run for a sufficient period of time to reveal any effects if they are going to occur (in some cases deterioration has been observed to occur rather rapidly after about nine months of exposure)).
(2) Mill process designs which provide the maximum practicable recycle of solutions and conservation of water to reduce the net'input of liquid to the tailings impoundment.
(3) Dewatering of tailings by process devices and/or in situ drainage systems (At new sites, tailings must be dewatered by a drainage system installed at the bottom of the impoundment to lower the phreatic surface and reduce the driving head of seepage, unless tests show tailings are not amenable to such a system. Where in situ dewatering is to be conducted, the impoundment bottom must be graded to assure that the drains are at a low point. The drains must be protected by suitable filter materials to assure that drains remain free running. The drainage system must also be adequately sized to assure good drainage).
(4) Neutralization to promote immobilization of hazardous constituents. Criterion 5F. Where ground water impacts are occurring at an existing site due to seepage, action must be taken to alleviate conditions that lead to excessive seepage impacts and restore ground water quality. The specific seepage control and ground water protection method, or combination of methods, to be used must be worked out on a site-specific basis. Technical specifications must be prepared to control installation of seepage control systems. A quality assurance, testing, and inspection program, which includes supervision by a qualified engineer or scientist, must be established to assure the specifications are met.
Criterion 5G. In support of a tailings disposal system proposal, the applicant/operator shall supply information concerning the following:
(1) The chemical and radioactive characteristics of the waste solutions.
(2) The characteristics of the underlying soil and geologic formations particularly as they will control transport of contaminants and solutions. This includes detailed information concerning extent, thickness, uniformity, shape, and orientation of underlying strata. Hydraulic gradients and conductivities of the various formations must be determined. This information must be gathered from borings and field survey methods taken within the proposed impoundment area and in surrounding areas where contaminants might migrate to ground water. The information gathered on boreholes must include both geological and geophysical logs in sufficient number and degree of sophistication to allow determining significant discontinuities, fractures, and channeled deposits of high hydraulic conductivity. If field survey methods are used, they should be in addition to and calibrated with borehole logging. Hydrologic parameters such as permeability may not be determined on the basis of laboratory analysis of samples alone; a sufficient amount of field testing (e.g., pump tests) must be conducted to assure actual field properties are adequately understood. Testing must be conducted to allow estimating chemi-sorption attenuation properties of underlying soil and rock.
(3) Location, extent, quality, capacity and current uses of any ground water at and near the site. Criterion 5H. Steps must be taken during stockpiling of ore to minimize penetration of radionuclides into underlying soils; suitable methods include lining and/or compaction of ore storage areas. Criterion 6.
(1) In disposing of waste byproduct material, licensees shall place an earthen cover (or approved alternative) over tailings or wastes at the end of milling operations and shall close the waste disposal area in accordance with a design 1 which provides reasonable assurance of control of radiological hazards to (i) be effective for 1,000 years, to the extent reasonably achievable, and, in any case, for at least 200 years, and (ii) limit releases of radon-222 from uranium byproduct materials, and radon-220 from thorium byproduct materials, to the atmosphere so as not to exceed an average 2 release rate of 0.74 Becquerel per square meter per second (Bq/m 2 s), or 20 picocuries per square meter per second (pCi/m 2 s), to the extent practicable throughout the effective design life determined pursuant to (1)(i) of this criterion. In computing required tailings cover thicknesses, moisture in soils in excess of amounts found normally in similar soils in similar circumstances may not be considered. Direct gamma exposure from the tailings or wastes should be reduced to background levels. The effects of any thin synthetic layer may not be taken into account in determining the calculated radon exhalation level. If non-soil materials are proposed as cover materials, it must be demonstrated that these materials will not crack or degrade by differential settlement, weathering, or other mechanism, over long-term intervals. 1 In the case of thorium byproduct materials, the standard applies only to design. Monitoring for radon emissions from thorium byproduct materials after installation of an appropriately designed cover is not required. 2 This average applies to the entire surface of each disposal area over a period of a least one year, but a period short compared to 100 years. Radon will come from both byproduct materials and from covering materials. Radon emissions from covering materials should be estimated as part of developing a closure plan for each site. The standard, however, applies only to the emissions from byproduct materials to the atmosphere.
(2) As soon as reasonably achievable after emplacement of the final cover to limit releases of radon-222 from uranium byproduct material and prior to placement of erosion protection barriers or other features necessary for long-term control of the tailings, the licensee shall verify through appropriate testing and analysis that the design and construction of the final radon barrier is effective in limiting releases of radon-222 to a level not exceeding 0.74 Bq/m 2 s (20 pCi/m 2 s) averaged over the entire pile or impoundment using the procedures described in 40 CFR Part 61, Appendix B, Method 115, or another method of verification approved by the Department as being at least as effective in demonstrating the effectiveness of the final radon barrier.
(3) When phased emplacement of the final radon barrier is included in the applicable reclamation plan, the verification of radon-222 release rates required in paragraph (2) of this Criterion must be conducted for each portion of the pile or impoundment as the final radon barrier for that portion is emplaced.
(4) Within ninety days of the completion of all testing and analysis relevant to the required verification in paragraphs (2) and (3) of this Criterion, the uranium mill licensee shall report to the Department the results detailing the actions taken to verify that levels of release of radon-222 do not exceed 0.74 Bq/m 2 s (20 pCi/m 2 s) when averaged over the entire pile or impoundment. The licensee shall maintain records until termination of the license documenting the source of input parameters including the results of all measurements on which they are based, the calculations and/or analytical methods used to derive values for input parameters, and the procedure used to determine compliance. These records shall be kept in a form suitable for transfer to the custodial agency at the time of transfer of the site to the U.S. Department of Energy or State for long-term care if requested.
(5) Near surface cover materials, i.e., within the top three meters (10 feet), may not include waste or rock that contains elevated levels of radium; soils used for near surface cover must be essentially the same, as far as radioactivity is concerned, as that of surrounding surface soils. This is to ensure that surface radon exhalation is not significantly above background because of the cover material itself.
(6) The design requirements in this Criterion for longevity and control of radon releases apply to any portion of a licensed and/or disposal site unless such portion contains a concentration of radium in land, averaged over areas of 100 square meters, which as a result of byproduct material, does not exceed the background level by more than: (i) 0.18 Becquerels (5 picocuries) per gram of radium-226, or, in the case of thorium byproduct material, radium-228, averaged over the first 15 centimeters (cm) below the surface, and (ii)0.56 Becquerels (15 pCi) of radium-226, or, in the case of thorium byproduct material, radium-228, averaged over 15-cm thick layers more than 15 cm below the surface.
Byproduct material containing concentrations of radionuclides other than radium in soil, and surface activity on remaining structures, must not result in a total effective dose equivalent (TEDE) exceeding the dose from cleanup of radium contaminated soil to the above standard (benchmark dose), and must be at levels which are as low is reasonably achievable. If more than one residual radionuclide is present in the same 100 square-meter area, the sum of the ratios for each radionuclide of concentration present to the concentration limit will not exceed “1” (unity). A calculation of the potential peak annual TEDE within 1000 years to the average member of the critical group that would result from applying the radium standard (not including radon) on the site must be submitted for approval. The use of decommissioning plans with benchmark doses which exceed 1 millisievert per year (100 mrem/year), before application of ALARA, requires the approval of the Department. This requirement for dose criteria does not apply to sites that have decommissioning plans for soil and structures approved before the effective date of this Criterion 6(6).
(7) The licensee shall also address the nonradiological hazards associated with the wastes in planning and implementing closure. The licensee shall ensure that disposal areas are closed in a manner that minimizes the need for further maintenance. To the extent necessary to prevent threats to human health and the environment, the licensee shall control minimize, or eliminate post-closure escape of nonradiological hazardous constituents, leachate, contaminated rainwater, or waste decomposition products to the ground or surface waters or to the atmosphere. Criterion 6A.
(1) For impoundments containing uranium byproduct materials, the final radon barrier must be completed as expeditiously as practicable considering technological feasibility after the pile or impoundment ceases operation in accordance with a written, Department-approved reclamation plan. (The term as expeditiously as practicable considering technological feasibility as specifically defined in RH 18.2 includes factors beyond the control of the licensee). Deadlines for completion of the final radon barrier and, if applicable, the following interim milestones must be established as a condition of the individual license: windblown tailings retrieval and placement on the pile and interim stabilization including dewatering or the removal of freestanding liquids and recontouring. The placement of erosion protection barriers or other feature necessary for long-term control of the tailings must also be completed in a timely manner in accordance with a written, Department- approved reclamation plan.
(2) The Department may approve a licensee's request to extend the time for performance of milestones related to emplacement of the final radon barrier if, after providing an opportunity for public participation, the Department finds that the licensee has adequately demonstrated in the manner required in paragraph (2) of Criterion 6 that releases of radon-222 do not exceed an average of 0.74 Becquerel/m 2 s (20 pCi/m 2 s). If the delay is approved on the basis that the radon releases do not exceed 0.74 Becquerel/m 2 s (20 pCi/m 2 s), a verification of radon levels, as required by paragraph (2) of Criterion 6, must be made annually during the period of delay. In addition, once the Department has established the date in the reclamation plan for the milestone for completion of the final radon barrier, the Department may extend that date based on cost if after providing an opportunity for public participation, the Department finds that the licensee is making good faith efforts to emplace the final radon barrier, the delay is consistent with the definition of available technology, and the radon releases caused by the delay will not result in a significant incremental risk to the public health.
(3) The Department may authorize by license amendment, upon licensee report, a portion of the impoundment to accept uranium byproduct material or such materials that are similar in physical, chemical, and radiological characteristics to the uranium mill tailings and associated wastes already in the pile or impoundment from other sources, during the closure process. No such authorization will be made if it results in a delay or impediment to emplacement of the final radon barrier over the remainder of the impoundment in a manner that will achieve levels of radon-222 releases not exceeding 0.74 Becquerel/m 2 s (20 pCi/m 2 s) averaged over the entire impoundment. The verification required in paragraph (2) of Criterion 6 may be completed with a portion of the impoundment being used for further disposal if the Department makes a final finding that the impoundment will continue to achieve a level of radon-222 release not exceeding 0.74 Becquerel/m 2 s (20 pCi/m 2 s) averaged over the entire impoundment. In this case, after the final radon barrier is complete except for the continuing disposal area, (a) only byproduct material will be authorized for disposal, (b) the disposal will be limited to the specified existing disposal area, and (c) this authorization will only be made after providing opportunity for public participation. Reclamation of the disposal area, as appropriate, must be completed in a timely manner after disposal operations cease in accordance with paragraph (1) of Criterion 6; however, these actions are not required to be complete as part of meeting the deadline for final radon barrier construction.
Criterion 7.
The licensee shall establish a detection monitoring program needed for the Department to set the site- specific ground water protection standards in paragraph 5B(1) of this appendix. For all monitoring under this paragraph, the licensee or applicant will propose for Department approval as license conditions which constituents are to be monitored on a site-specific basis. A detection monitoring program has two purposes. The initial purpose of the program is to detect leakage of hazardous constituents from the disposal area so that the need to set ground water protection standards is monitored. If leakage is detected, the second purpose of the program is to generate data and information needed for the Department to establish the standards under Criterion 5B. The data and information must provide a sufficient basis to identify those hazardous constituents which require concentration limit standards and to enable the Department to set the limits for those constituents and the compliance period. They may also need to provide the basis for adjustments to the point of compliance. The detection monitoring programs must be in place when specified by the Department in orders or license conditions. Once ground water protection standards have been established pursuant to paragraph 5B(1), the licensee shall establish and implement a compliance monitoring program. The purpose of the compliance monitoring program is to determine that the hazardous constituent concentrations in ground water continue to comply with the standards set by the Department. In conjunction with a corrective action program, the licensee shall establish and implement a corrective action monitoring program. The purpose of the corrective action monitoring program is to demonstrate the effectiveness of the corrective actions. Any monitoring program required by this paragraph may be based on existing monitoring programs to the extent the existing programs can meet the stated objective for the program. Criterion 8.
Milling operations must be conducted so that all airborne effluent releases are reduced to levels as low as is reasonably achievable. The primary means of accomplishing this must be by means of emission controls. Institutional controls, such as extending the site boundary and exclusion area, may be employed to ensure that offsite exposure limits are met, but only after all practicable measures have been taken to control emissions at the source. Notwithstanding the existence of individual dose standards, strict control of emissions is necessary to assure that population exposures are reduced to the maximurn extent reasonably achievable and to avoid site contamination. The greatest potential sources of offsite radiation exposure (aside from radon exposure) are dusting from dry surfaces of the tailings disposal area not covered by tailings solution and emissions from yellowcake drying and packaging operations. During operations and prior to closure, radiation doses from radon emissions from surface impoundments of uranium or thorium byproduct materials must be kept as low as is reasonably achievable. Checks must be made and logged hourly for all parameters (e.g., differential pressures and scrubber water flow rates) that determine the efficiency of yellowcake stack emission control equipment operation. The licensee shall retain each log as a record for three years after the last entry in the log is made. It must be determined whether or not conditions are within a range prescribed to ensure that the equipment is operating consistently near peak efficiency; corrective action must be taken when performance is outside of prescribed ranges. Effluent control devices must be operative at all times during drying and packaging operations and whenever air is exhausting from the yellowcake stack. Drying and packaging operations must terminate when controls are inoperative. When checks indicate the equipment is not operating within the range prescribed for peak efficiency, actions must be taken to restore parameters to the prescribed range. When this cannot be done without shutdown and repairs, drying and packaging operations must cease as soon as practicable. Operations may not be restarted after cessation due to off-normal performance until needed corrective actions have been identified and implemented. All these cessations, corrective actions, and restarts must be reported to the Department as indicated in Criterion 8A, in writing, within ten days of the subsequent restart.
To control dusting from tailings, that portion not covered by standing liquids must be wetted or chemically stabilized to prevent or minimize blowing and dusting to the maximum extent reasonably achievable. This requirement may be relaxed if tailings are effectively sheltered from wind, such as may be the case where they are disposed of below grade and the tailings surface is not exposed to wind. Consideration must be given in planning tailings disposal programs to methods which would allow phased covering and reclamation of tailings impoundments because this will help in controlling particulate and radon emissions during operation. To control dusting from diffuse sources, such as tailings and ore pads where automatic controls do not apply, operators shall develop written operating procedures specifying the methods of control which will be utilized.
Milling operations producing or involving uranium and thorium byproduct materials must be conducted in such a manner as to provide reasonable assurance that the annual dose equivalent does not exceed 0.25 millisievert (25 millirem) to the whole body, 0.75 millisievert (75 millirem) to the thyroid, and 0.25 millisievert (25 millirem) to any other organ of any member of the public as a result of exposures to the planned discharge of radioactive material, radon and its progeny excepted, to the general environment. Uranium and thorium byproduct materials must be managed so as to conform to the applicable provisions of Title 40 of the Code of Federal Regulations , Part 440, “Ore Mining and Dressing Point Source Category: Effluent Limitations Guidelines and New Source Performance Standards, Subpart C, Uranium, Radium, and Vanadium Ores Subcategory” , as codified on January 1, 1983. Criterion 8A. Inspections of tailings or waste retention systems must be conducted daily during operations, or at an alternate frequency approved by the Department for other conditions. Such inspections shall be conducted by, or under the supervision of, a qualified engineer or scientist, and documented. The licensee shall retain the documentation for each inspection as a record for three years after the documentation is made. The Department must be immediately notified of any failure in a tailings or waste retention system that results in a release of tailings or waste into unrestricted areas, or any unusual conditions (conditions not contemplated in the design of the retention system) that if not corrected could indicate the potential or lead to failure of the system and result in a release of tailings or waste into unrestricted areas.
Criterion 9.
Criterion 9A. These criteria relating to ownership of tailings and their disposal sites became effective on November 8, 1981, and apply to all licenses terminated, issued, or renewed after that date. Criterion 9B. Any uranium or thorium milling license or tailings license must contain such terms and conditions as the U.S. Nuclear Regulatory Commission and Department determine necessary to assure that prior to termination of the license, the licensee will comply with ownership requirements of this criterion for sites used for tailings disposal.
Criterion 9C. Title to the byproduct material licensed under this Part 18 and land, including any interests therein (other than land owned by the United States or by the State), which is used for the disposal of any such byproduct material, or is essential to ensure the long-term stability of such disposal site, must be transferred to the United States or the State in which such land is located, at the option of such State. In view of the fact that physical isolation must be the primary means of long-term control, and Government land ownership is a desirable supplementary measure, ownership of certain severable subsurface interests (for example, mineral rights) may be determined to be unnecessary to protect the public health and safety and the environment. In any case, however, the applicant/operator must demonstrate a serious effort to obtain such subsurface rights, and must in the event that certain rights cannot be obtained, provide notification in local public land records of the fact that the land is being used for the disposal of radioactive material and is subject to either a U.S. Nuclear Regulatory Commission or Department general or specific license prohibiting the disruption and disturbance of the tailings. In some rare cases, such as may occur with deep burial where no ongoing site surveillance will be required, surface land ownership transfer requirements may be waived with the approval of the Department and U.S. Nuclear Regulatory Commission. For licenses issued before November 8, 1981, the Department and U.S. Nuclear Regulatory Commission may take into account the status of the ownership of such land, and interests therein, and the ability of a licensee to transfer title and custody thereof to the United States or the State. Criterion 9D. If the U.S. Nuclear Regulatory Commission, or the Department if title is held by the State, subsequent to title transfer determines that use of the surface or subsurface estates, or both, of the land transferred to the United States or to a State will not endanger the public health, safety, welfare, or environment, the U.S. Nuclear Regulatory Commission, or the Department if title is held by the State, may permit the use of the surface or subsurface estates, or both, of such and in a manner consistent with the provisions provided in these criteria. If the U.S. Nuclear Regulatory Commission, or the Department if title is held by the state, permits such use of such land, it will provide the person who transferred such land with the right of first refusal with respect to such use of such land. Criterion 9E. Material and land transferred to the United States or the State in accordance with this Criterion 9 must be transferred to the United States or the State without cost other than administrative or legal costs incurred in carrying out such transfer.
Criterion 9F. The provisions of this part respecting transfer of title and custody to land and tailings and wastes do not apply in the case of lands held in trust by the United States for any Indian tribe or lands owned by such Indian tribe subject to a restriction against alienation imposed by the United States. In the case of such lands which are used for the disposal of uranium or thorium byproduct material, as defined in Part 1, the licensee shall enter into arrangements with the U.S. Nuclear Regulatory Commission as may be appropriate to assure the long-term surveillance of such lands by the United States. Criterion 10.
Secondary ground-water protection standards required by Criterion 5 of this Appendix are concentration limits for individual hazardous constituents. The following list of constituents identifies the constituents for which standards must be set and complied with if the specific constituent is reasonably expected to be in or derived from the radioactive material and has been detected in ground water. For purposes of this Appendix, the property of gross alpha activity will be treated as if it is a hazardous constituent. Thus, when setting standards under paragraph 5B(5) of Criterion 5, the Department will also set a limit for gross alpha activity. The Department does not consider the following list imposed by 40 CFR Part 192 to be exhaustive and may determine other constituents to be hazardous on a case-by-case basis, independent of those specified by the U.S. Environmental Protection Agency in Part 192. PART 18 - CRITERION 10 HAZARDOUS CONSTITUENTS - Acetonitrile (Ethanenitrile)
- Acetophenone (Ethanone, 1-phenyl)
- 3-(alpha-Acetonylbenzyl)-4-hydroxycoumarin and salts (Warfarin) - 2-Acetylaminofluorene (Acetamide, N-(9H- fluoren-2-yl)-) - Acetyl chloride (Ethanoyl chloride)
- 1-Acetyl-2-thiourea (Acetamide, N- (aminothioxomethyl)-) - Acrolein (2-Propenal)
- Acrylamide (2-Propenamide)
- Acrylonitrile (2-Propenenitrile)
- Aflatoxins - Aldrin (1,2,3,4,10,10-Hexachloro-1,4,4a,5,8,8a,8b-hexahydro-endo,exo-1,4:5,8- Dimethanonaphthalene)
- Allyl alcohol (2-Propen-1-ol)
- Aluminum phosphide - 4-Aminobiphenyl ([1,1-Biphenyl])-4-amine)
- 6-Amino-1,1a,2,8,8a,8b-hexahydro-8-(hydroxymethyl)-8a-methoxy-5-methyl-carbamate azirino(2,3:3,4)pyrrolo(1,2-a]indole-4,7-dione,(ester) (Mitomycin C) (Azirino[2,3:3,4]pyrrolo(1,2- a)indole-4,7-dione,6-amino-8-[((amino-cabonyl)oxy)methyl)-1,1a,2,8,8a,8b-hexahydro-8a methoxy-5-methyl-)
- 5-(Aminomethyl)-3-isoxazolol (3(2H)-Isoxazolone, 5-(aminomethyl)-)4-Aminopyridine (4-Pyridinamine) - Amitrole (1H-1,2,4-Triazol-3-amine)
- Aniline (Benzenamine)
- Antimony and compounds, N.O.S. 3 - Aramite (Sulfurous acid,2-chloroethyl-,2-(4-(1,1-dimethylethyl)phenoxy)-1-methylethyl ester) - Arsenic and compounds, N.O.S. 3 - Arsenic acid (Orthoarsenic acid)
- Arsenic pentoxide (Arsenic (V) oxide)
- Arsenic trioxide (Arsenic (III) oxide)
- Auramine (Benzenamine,4,4-carbonimidoylbis (N,N-Dimethyl-,monohydrochloride) - Azaserine (L-Serine, diazoacetate (ester))
- Barium and compounds, N.O.S. 3 - Barium cyanide - Benz(c)acridine (3.4-Benzacridine)
- Benz(a)anthracene (1,2-Benzanthracene)
- Benzene (Cyclohexatriene)
- Benzenearsonic acid (Arsonic acid, phenyl-)
- Benzene, dichloromethyl-(Benzal chloride)
- Benzenethiol (Thiophenol)
- Benzidine ([1,1-Biphenyl]-4,4 diamine)
- Benzo(b)fluoranthene (2,3-Benzofluoranthene)
- Benzo(j)fluoranthene (7,8-Benzofluoranthene)
- Benzo(a)pyrene (3,4-Benzopyrene)
- p-Benzoquinone (1,4-Cyclohexadienedione)
- Benzotrichloride (Benzene, Trichloromethyl)
- Benzyl chloride (Benzene, (chloromethyl)-)
- Beryllium and compounds, N.O.S. 3 - Bis(2-chloroethoxy)methane (Ethane,1,1-(methylenebis(oxy)]bis[2-chloro-]) - Bis(2-chloroethyl) ether (Ethane, 1,1-oxybis (2-chloro-)) - N,N-Bis(2-chloroethyl)-2-naphthylamine (Chlornaphazine) - Bis(2-Chloroisopropyl) ether (Propane, 2,2-oxybis[2-chloro-]) - Bis(chloromethyl) ether (methane,oxybis[chloro-])
- Bis(2-ethylhexyl) phthalate (1,2-Benzenedicarboxylic acid, bis(2-ethylhexyl) ester) - Bromoacetone (2-Propanone, 1-bromo-)
- Bromomethane (Methyl bromide)
- 4-Bromophenyl phenyl ether (Benzene, 1-bromo-4-phenoxy-) - Brucine (Strychnidin-10-one, 2,3-dimethoxy-)
- 2-Butanone peroxide (Methyl ethyl ketone,peroxide)
- Butyl benzyl phthalate (1,2-Benzenedicarboxylic acid, butylphenylmethyl ester) - 2-sec-Butyl-4,6-dinitrophenol (DNBP) (Phenol,2,4-dinitro-6-(1-methylpropyl)-) - Cadmium and compounds, N.O.S. 3 - Calcium chromate (Chromic acid, calcium salt)
- Calcium cyanide - Carbon disulfide (Carbon bisulfide)
- Carbon oxyfluoride (Carbonyl fluoride)
- Chloral (Acetaldehyde, trichloro-)
- Chlorambucil (Butanoic acid, 4-(bis(2-chloroethyl)amino)benzene-) - Chlordane (alpha and gamma isomers)4,7-Methanoindan, 1,2,4,5,6,7,8,8-octachloro-3,4,7,7a- tetrahydro-) (alpha and gammaisomers)
- Chlorinated benzenes, N.O.S. 3 - Chlorinated ethane, N.O.S. 3 - Chlorinated fluorocarbons, N.O.S. 3 - Chlorinated naphthalene, N.O.S. 3 - Chlorinated phenol, N.O.S. 3 - Chloroacetaldehyde (Acetaldehyde, chloro-)
- Chloroalkyl ethers N.O.S. 3 - p-Chloroaniline (Benzenamine, 4-chloro-)
- Chlorobenzene (Benzene, chloro-)
- Chlorobenzilate (Benzeneacetic acid, 4-chloro-alpha-(4-chlorophenyl)-alpha-hydroxy-,ethyl ester) - p-Chloro-m-cresol (Phenol, 4-chloro-3-methyl)
- 1-Chloro-2,3-epoxypropane (Oxirane, 2-(chloromethyl)-) - 2-Chloroethyl vinyl ether (Ethene, (2-chloroethoxy)-) - Chloroform (Methane, trichloro-)
- Chloromethane (Methyl chloride)
- Chloromethyl methyl ether (Methane,chloromethoxy-)
- 2-Chloronaphthalene (Naphthalene,betachloro-)
- 2-Chlorophenol (Phenol, o-chloro-)
- 1-(o-Chlorophenyl) thiourea (Thiourea, (2-chlorophenyl)-) - 3-Chloropropionitrile (Propanenitrile, 3-chloro-)
- Chromium and compounds, N.O.S. 3 - Chrysene (1,2-Benzphenanthrene)
- Citrus red No. 2 (2-Naphthol, 1-((2,5-dimethoxyphenyl)azo)-) - Coal tars - Copper cyanide - Creosote (Creosote, wood)
- Cresols (Cresylic acid) (Phenol, methyl-)
- Crotonaldehyde (2-Butenal)
- Cyanides (soluble salts and complexes),N.O.S. 3 - Cyanogen (Ethanedinitrile)
- Cyanogen bromide (Bromine cyanide)
- Cyanogen chloride (Chlorine cyanide)
- Cycasin (beta-D-Glucopyranoside, (methyl-ONN-azoxy)methyl-) - 2-Cyclohexyl-4,6-dinitrophenol (phenol, 2-cyclohexyl-4,6-dinitro-) - Cyclophosphamide (2H-1,3,2-Oxazaphosphorine (bis(2-chloroethyl)amino)-tetrahydro-,2-oxide) - Daunomycin (5,12-Naphthacenedione, (8S-cis)-8-acetyl-10-((3-amino-2,3,6-trideoxy)-alpha-L-lyxo- hexopyranosyl)oxy)7,8,9,10-tetrahydro-6,8,11-trihydroxy-1-methoxy-) - DDD (Dichlorodiphenyldichloroethane)(Ethane, 1,1-dichloro-2,2-bis(p-chlorophenyl)-) - DDE (Ethylene, 1,1-dichloro-2,2-bis(4-chlorophenyl)-) - DDT (Dichlorodiphenyltrichloroethane) (Ethane, 1,1,1-trichloro-2,2-bis (p-chlorophenyl)-) - Diallate (S-(2,3-dichloroallyl)diisopropylthiocarbamate) - Dibenz(a,h)acridine(1,2,5,6-Dibenzacridine)
- Dibenz(a,j)acridine(1,2,7,8-Dibenzacridine)
- Dibenz(a,h)anthracene (1,2,5,6-Dibenzanthracene - 7H-Dibenzo(c,g)carbazole (3,4,5,6-Dibenzcarbazole)
- Dibenzo(a,e)pyrene(1,2,4,5-Dibenzpyrene)
- Dibenzo(a,h)pyrene(1,2,5,6-Dibenzpyrene)
- Dibenzo(a,i)pyrene(1,2,7,8-Dibenzpyrene)
- 1,2-Dibromo-3-chloropropane (Propane, 1,2-dibromo-3-chloro-) - 1,2 Dibromoethane (Ethylene dibromide)
- Dibromomethane (Methylene bromide)
- Di-n-butyl phthalate (1,2-Benzenedicarboxylic acid, dibutyl ester) - o-Dichlorobenzene (Benzene, 1,2-dichloro-)
- m-Dichlorobenzene (Benzene, 1,3-dichloro-)
- p-Dichlorobenzene (Benzene, 1,4-dichlor-)
- Dichlorobenzene, N.O.S. 3 (Benzene, dichloro-N.O.S. 3 ) - 3,3-Dichlorobenzidine ([1,1, Biphenyl]-4,4-diamine, 3,3-dichloro-) - 1,4-Dichloro-2-butene (2-Butene, 1,4-dichloro-)
- Dichlorodifluoromethane (Methane, dichlorodifluoro-)
- 1,1 Dichloroethane (Ethylidene dichloride)
- 1,2 Dichloroethane (Ethylene dichloride)
- trans-1,2-Dichloroethene (1,2-Dichloroethylene)
- Dichloroethylene, N.O.S. 3 (Ethene, dichloro-N.O.S. 3 - 1,1-Dichloroethylene (Ethene, 1,1-dichloro-)
- Dichloromethane (Methylene chloride)
- 2,4-Dichlorophenol (Phenol, 2,4-dichloro-)
- 2,6-Dichlorophenol (Phenol, 2,6-dichloro-)
- 2,4-Dichlorophenoxyacetic acid (2,4-D), saltsand esters (Acetic acid, 2,4-dichlorophenoxy-, salts and esters)
- Dichlorophenylarsine (Phenyl dichloroarsine)
- Dichloropropane, N.O.S. 3 (Propane, dichloro-N.O.S. 3 - 1,2-Dichloropropane (Propylene dichloride)
- Dichloropropanol, N.O.S. 3 (Propanol, dichloro-N.O.S. 3 ) - Dichloropropene, N.O.S. 3 (Propene, dichloro-N.O.S. 3 - 1,3-Dichloropropene (1-Propene, 1,3-dichloro-)
- Dieldin (1,2,3,4,10,10-hexachloro-6,7-epoxy-1,4,4a,5,6,7,8,8a-octa-hydro-endo,exo-1,4:5,8- Dimethanonaphthalene)
- 1,2:3,4-Diepoxybutane (2,2,-Bioxirane)
- Diethylarsine (Arsine, diethyl-)
- N,N-Diethylhydrazine (Hydrazine, 1,2-diethyl)
- O,O-Diethyl S-methyl ester of phosphorodithioic acid (Phosphorodithioic acid, O,O-diethyl S-methyl ester)
- O,O-Diethylphosphoric acid, O-p-nitrophenyl ester (Phosphoric acid, diethyl p-nitrophenyl ester) - Diethyl phthalate (1,2-Benzenedicarboxylic acid, diethyl ester) - O,O-Diethyl O-2-pyrazinyl phosphorothioate (Phosphorothioic acid, O,0-diethyl O-pyrazinyl ester) - Diethylstilbesterol (4,4-Stilbenediol,alpha,alpha-diethyl,bis(dihydrogen phosphate, (E)-) - Dihydrosafrole (Benzene, 1,2-methylenedioxy-4-propyl-) - 3,4-Dihydroxy-alpha-(methylamino)methylbenzyl alcohol (1,2-Benzenediol, 4-(1-hydroxy-2 (methylamino)ethyl))
- Dilsopropylfluorophosphate (DFP) (Phosphorofluoridic acid, bis(1-methylethyl) ester) - Dimethoate (Phosphorodithioic acid, O,O-dimethyl S-(2-(methylamino)-2-oxoethyl) ester) - 3,3,-Dimethoxybenzidine ((1,1,-Biphenyl)-4,4,-diamine, 3-3,-dimethoxy-) - p-Dimethylaminoazobenzene (Benzenamine, N,N-dimethyl-4-(phenylazo)-) - 7,12-Dimethylbenz(a)anthracene(1,2-Benzathracene, 7,12-dimethyl-) - 3,3-Dimethylbenzidine (1,1-Biphenyl)-4,4,diamine, 3,3-dimethyl-) - Dimethylcarbamoyl chloride (Carbamoyl chloride, dimethyl) - 1,1 Dimethylhydrazine (Hydrazine, 1,1-dimethyl-)
- 1,2-Dimethylhydrazine (Hydrazine, 1,2-dimethyl-)
- 3,3-Dimethyl-1-(methylthio)-2-butanone, O-[(methylamino) carbonyl] oxime (Thiofanox) - alpha,alpha-Dimethylphenethylamine (Ethanamine, 1,1-dimethyl-2-phenyl-) - 2,4-Dimethylphenol (Phenol, 2,4-dimethyl-)
- Dimethyl phthalate (1,2-Benzenedicarboxylic acid, dimethyl ester) - Dimethyl sulfate (Sulfuric acid, dimethyl ester)
- Dinitrobenzene, N.O.S. 3 (Benzene, dinitro-N.O.S. 3 ) - 4,6-Dinitro-o-cresol and salts (Phenol, 2,4-dinitro-6-methyl-, and salts) - 2,4-Dinitrophenol (Phenol, 2,4-dinitro-)
- 2,4-Dinitrotoluene (Benzene, 1-methyl-2,4-dinitro-)
- 2,6-Dinitrotoluene (Benzene, 1-methyl 2,6-dinitro-)
- Di-n-octyl phthalate (1,2-Benzenedicarboxylic acid, dioctyl ester) - 1,4-Dioxane (1,4-Diethylene oxide)
- Diphenylamine (Benzenamine, N-phenyl-)
- 1,2-Diphenylhydrazine (Hydrazine, 1,2-diphenyl-)
- Di-n-propylnitrosamine (N-Nitroso-di-n-propylamine)
- Disulfoton (O,O-diethyl S-(2-(ethylthio)ethyl) phosphorodithioate) - 2,4-Dithiobiuret (Thiomidodicarbonic diamide)
- Endosulfan (5-Norbomene, 2,3-dimethanol,1,4,5,6,7,7-hexachloro-cyclic sulfite) - Endrin and metabolites (1,2,3,4,10,10-hexachloro-6,7-epoxy-1,4,4a,5,6,7,8,8a-octahydro-endo, endo- 1,4,5,8-dimethanonaphthalene, and metabolites)
- Ethyl carbamate (Urethan) (Carbamic acid, ethyl ester) - Ethyl cyanide (Propanenitrile)
- Ethylenebisdithiocarbamic acid, salts, and esters (1,2-Ethanediyl-biscarbamodithioic acid, salts and esters)
- Ethyleneimine (Aziridine)
- Ethylene oxide (Oxirane)
- Ethylenethiourea (2-Imidazolidinethione)
- Ethyl methacrylate (2-Propenoic acid, 2-methyl-, ethyl ester) - Ethyl methanesulfonate (Methanesulfonic acid, ethyl ester) - Fluoranthene (Benzo[j,k]fluorene)
- Fluorine - 2-Fluoroacetamide (Acetamide, 2-fluoro-)
- Fluoroacetic acid, sodium salt (Acetic acid, fluoro-sodium salt) - Formaldehyde (Methylene oxide)
- Formic acid (Methanoic acid)
- Glycidylaldehyde (1-Propanol-2,3 epoxy)
- Halomethane, N.O.S. 3 - Heptachlor (4,7-Methano-1H-indene.1,4,5,6,7,8,8-heptachloro-3a,4,7,7a-tetrahydro-) - Heptachlor epoxide (alpha, beta, and gamma isomers) (4,7-Methano-1H-indene, 1,4,5,6,7,8,8- heptachloro-2,3-epoxy-3a,4,7,7-tetrahydro-,alpha, beta, and gamma isomers) - Hexachlorobenzene (Benzene, hexachloro-)
- Hexachlorobutadiene (1,3-Butadiene, 1,1,2,3,4,4-hexachloro-) - Hexachlorocyclohexane (all isomers) (Lindane and isomers) - Hexachlorocyclopentadiene (1,3-Cyclopentadiene, 1,2,3,4,5,5-hexachloro-) - Hexachloroethane (Ethane, 1,1,1,2,2,2-hexachloro-)
- 1,2,3,4,10,10-Hexachloro-1,4,4a,5,8,8a-hexahydro-1,4,5,8-endo,endo-dimethanonaphthalene (Hexachlorohexa-hydro-endo,endo-dimethanonaphthalene)
- Hexachlorophene (2,2,-Methylenebis(3,4,6-trichlorophenol) - Hexachloropropene (1-Propene, 1,1,2,3,3,3-hexachloro-) - Hexaethyl tetraphosphate (Tetraphosphoric acid, hexaethyl ester) - Hydrazine (Diamine)
- Hydrocyanic acid (Hydrogen cyanide)
- Hydrofluoric acid (Hydrogen fluoride)
- Hydrogen sulfide (Sulfur hydride)
- Hydroxydimethylarsine oxide (Cacodylic acid)
- Indeno (1,2,3-cd)pyrene(1,10-(1,2-phenylene)pyrene)
- Iodomethane (Methyl iodide)
- Iron dextran (Ferric dextran)
- Isocyanic acid, methyl ester (Methyl isocyanate)
- Isobutyl alcohol (1-Propanol, 2-methyl-)
- Isosafrole (Benzene, 1,2-methylenedioxy-4-allyl-)
- Kepone (decachlorooctahydro-1,3,4-Methano-2H-cyclobuta[cd]pentalen-2-one) - Lasiocarpine (2-Butenoic acid, 2-methyl-,7-[(2,3-dihydroxy-2-(1-methoxyethyl)-3-methyl-1-oxobutoxy) methyl]2,3,5,7a-tetrahydro-1H-pyrrolizin-1-yl-ester)
- Lead and compounds, N.O.S. 3 - Lead acetate (Acetic acid, lead salt)
- Lead phosphate (Phosphoric acid, lead salt)
- Lead subacetate (Lead, bis(acetato-O)tetrahydroxytri-) - Maleic anhydride (2,5-Furandione)
- Maleic hydrazide (1,2-Dihydro-3,6-pyridazinedione)
- Malononitrile (Propanedinitrile)
- Melphalan (Alanine, 3-(p-bis(2-chloroethyl)amino)phenyl-L-)- Mercury fulminate (Fulminic acid, mercury salt)
- Mercury and compounds, N.O.S. 3 - Methacrylonitrile (2-Propenenitrile,2-methyl-)
- Methanethiol (Thiomethanol)
- Methapyrilene (Pyridine, 2-[(2-dimethylamino)ethyl)]-2-thenylamino-) - Metholmyl (Acetimidic acid, N-[(methylcarbamoyl)oxy] thio-,methyl ester) - Methoxychlor (Ethane, 1,1,1-trichloro-2,2,-bis(p-methoxyphenyl)-) - 2-Methylaziridine (1,2-Propylenimine)
- 3-Methlycholanthrene (Benz[j]aceanthrylene,1,2-dihydro-3-methyl-) - Methyl chlorcarbonate (Carbonochloridicacid, methyl ester) - 4,4-Methylenebis (2-chloroaniline) Benzenamine, 4,4-methylenebis-(2-chloro-) - Methyl ethyl ketone (MEK) (2-Butanone)
- Methyl hydrazine (Hydrazine methyl-)
- 2-Methyllactonitrile (Propanenitrile 2-hydroxy-2-methyl-) - Methyl methacrylate (2-Propenoic acid, 2-methyl-, methyl ester) - Methyl methanesulfonate Methanesulfonicacid, methyl ester) - 2-Methyl-2-(methylthio)propionaldehyde-o-(methylcarbonyl) oxime (Propanal,2-methyl-2(methylthio-0- [(methylamino)carbonyl]oxime)
- N-Methyl-N,-nitro-N-nitrosoguanidine (Guanidine, N-nitroso-N-methyl-N,-nitro-) - Methyl parathion (0,0-dimethyl 0-(40 nitrophenyl) phosphorothioate) - Methylthiouracil (4-IH-Pyrimidinone, 2,3-dihydro-6-methyl-2-thioxo-) - Molybdenum and compounds, N.O.S. 3 - Mustard gas (Sulfide, bis(2-chloroethyl)-)
- Naphthalene - 1,4-Naphthoquinone (1,4-Naphthalenedione)
- 1-Naphthylamine (alpha-Naphthylamine)
- 2-Naphthylamine (beta-Naphthylamine)
- 1-Naphthyl-2-thiourea (Thiourea, 1-naphthalenyl-)
- Nickel and compounds, N.O.S. 3 - Nickel carbonyl (Nickel tetracarbonyl)
- Nickel cyanide (Nickel (II) cyanide)
- Nicotine and salts (Pyridine, (S)-3-(1-methyl-2-pyrrolidinyl)-, and salts) - Nitric oxide (Nitrogen (II) oxide)
- p-Nitroaniline (Benzenamine, 4-nitro-)
- Nitrobenzine (Benzene, nitro-)
- Nitrogen dioxide (Nitrogen (IV) oxide)
- Nitrogen mustard and hydrochloride salt (Ethanamine, 2-chloro-,N-(2-chloroethyl)-N-methyl-, and hydrochloride salt)
- Nitrogen mustard N-Oxide and hydrochloride salt (Ethanamine, 2-chloro,N-(2-chloroethyl)-N-methyl- and hydrochloride salt)
- Nitroglycerine (1,2,3-Propanetriol, trinitrate)
- 4-Nitrophenol (Phenol, 4-nitro)
- 4-Nitroquinoline-1-oxide (Quinoline,4-nitro-1-oxide-) - Nitrosamine, N.O.S. 3 - N-Nitrosodi-n-butylamine (1-Butanamine,N-butyl-N-nitroso-) - N-Nitrosodiethanolamine (Ethanol, 2,2-(nitrosoimino)bis-) - N-Nitrosodiethylamine (Ethanamine, N-ethyl-N-nitroso-) - N-Nitrosodimethylamine (Dimethylnitrosamine)
- N-Nitroso-N-ethylurea (Carbamide, N-ethyl-N-nitroso-) - N-Nitrosomethylethylamine (Ethanamine, N-methyl-N-nitroso-) - N-Nitroso-N-methylurea (Carbamide, N-methyl-N-nitroso-) - N-Nitroso-N-methylurethane (Carbamic acid, methylnitroso-, ethyl ester) - N-Nitrosomethylvinylamine (Ethenamine,N-methyl-N-nitroso-) - N-Nitrosomorpholine (Morpholine,-N-nitroso-)
- N-Nitrosonomicotine (Nornicotine,-N-nitroso-)
- N-Nitrosopiperidine (Pyridine, hexahydro-,N-nitroso-) - Nitrosopyrrolidine (Pyrrole, tetrahydro-N-nitroso-)
- N-Nitrososarcosine (Sarcosine,-N-nitroso-)
- 5-Nitro-o-toluidine (Benzenamine, 2-methyl-5-nitro-)
- Octamethylpyrophosphoramide (Diphosphoramide, octamethyl-) - Osmium tetroxide (Osmium(VIII)oxide)
- 7-Oxabicyclo(2,2,1)heptane-2,3-dicarboxylic acid (Endothal) - Paraldehyde (1,3,5-Trioxane, 2,4,6-trimethyl-)
- Parathion (Phosphorothioic acid O,O-diethylO-(p-nitrophenyl) ester) - Pentachlorobenzene (Benzene, pentachloro-)
- Pentachloroethane (Ethane, pentachloro-)
- Pentachloronitrobenzene (PCNB) (Benzene, Pentachloronitro-) - Pentachlorophenol (Phenol, pentachloro-)
- Phenacetin (Acetamide, N-(4-ethoxyphenyl)-)
- Phenol (Benzene, hydroxy-)
- Phenylenediamine (Benzenediamine)
- Phenylmercury acetate (Mercury acetatophenyl-)
- N-Phenylthiourea (Thiourea, phenyl-)
- Phosgene (Carbonyl chloride)
- Phosphine (Hydrogen phosphide)
- Phosphorodithioic acid, O,O-diethyl S-[(ethylthio)methyl]ester (Phorate) - Phosphorothioic acid, O,O-dimethyl O-(p-[(dimethylamino)sulfonyl)phenyl]ester (Famphur) - Phthalic acid esters, N.O.S. 3 (Benzene, 1,2-dicarboxylic acid, esters, N.O.S. 3 ) - Phthalic anhydride (1,2-Benzenedicarboxylic acid anhydride) - 2-Picoline (Pyridine, 2-methyl-)
- Polychlorinated biphenyl, N.O.S. 3 - Potassium cynanide - Potassium silver cyanide (Argentate(1-),dicyano-,potassium) - Pronamide (3,5-Dichloro-N-(1,1-dimethyl-2-propynyl)benzamide) - 1,3 Propane sultone (1,2-Oxathiolane, 2,2-dioxide)
- n-Propylamine (1-Propanamine)
- Propylthiouracil (Undecamethylenediamine,N,N-bis(2-chlorobenzyl-),dihydrochloride) - 2-Propyn-1-ol (Propargyl alcohol)
- Pyridine - Radium-226 and -228 - Reserpine (Yohimban-16-carboxylic acid,11,17-dimethoxy-18-[3,4,5-trimethoxybenzoyl)oxy]-, methyl ester)
- Resorcinol (1,3-Benzenediol)
- Saccharin and salts (1,2-Benzoisothiazolin-3-one, 1,1-dioxide, and salts) - Safrele (Benzene, 1,2-methylenedioxy-4-allyl-)
- Selenious acid (Selenium dioxide)
- Selenium and compounds, N.O.S. 3 - Selenium sulfide (Sulfur selenide)
- Selenourea (Carbamimidoselenoic acid)
- Silver and compounds, N.O.S. 3 - Silver cyanide - Sodium cyanide - Streptozotocin (D-Glucopyranose, 2-deoxy-2-(3-methyl-3-nitrosoureido)-) - Strontium sulfide - Strychnine and salts (Strychnidin-10-one, and salts)
- 1,2,4,5-Tetrachlorobenzene (Benzene,1,2,4,5-tetrachloro-) - 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) (Dibenzo-p-dioxin, 2,3,7,8-tetrachloro-) - Tetrachloroethane, N.O.S. 3 (Ethane, tetrachloro-N.O.S. 3 - 1,1,1,2-Tetrachlorethane (Ethane, 1,1,1,2-tetrachloro-) - 1,1,2,2-Tetrachlorethane (Ethane 1,1,2,2-tetrachloro-) - Tetrachlorethane (Ethene, 1,1,2,2-tetrachloro-)
- Tetrachloromethane (Carbon tetrachloride)
- 2,3,4,6-Tetrachlorophenol (Phenol 2,3,4,6-tetrachloro-) - Tetraethyldithiopyrophosphate (Dithiopyrophosphoric acid, tetraethyl-ester) - Tetraethyl lead (Plumbane, tetraethyl-)
- Tetraethylpyrophosphate (Pyrophosphoricacide, tetraethyl ester) - Tetranitromethane (Methane, tetranitro-)
- Thallium and compounds, N.O.S. 3 - Thallic oxide (Thallium (III) oxide)
- Thallium (I) acetate (Acetic acid, thallium (I) salt) - Thallium (I) carbonate (Carbonic acid dithallium (I) salt) - Thallium (I) chloride - Thallium (I) nitrate (Nitric acid, thallium (I) salt) - Thallium selenite - Thallium (I) sulfate (Sulfuric acid, thallium (I) salt) - Thioacetamide (Ethanethioamide)
- Thiosemicarbazide (Hydrazinecarbothioamide)
- Thiourea (Carbamide thio-)
- Thiuram (Bis(dimethylthiocarbamoyl) disulfide)
- Thorium and compounds, N.O.S. 3 when producing thorium byproduct material - Toluene (Benzene, methyl-)
- Toluenediamine (Diaminotoluene)
- o-Toluidine hydrochloride (Benzenamine, 2-methyl-,hydrochloride) - Tolylene diisocyanate (Benzene, 1,3-diisocyanatomethyl-) - Toxaphene (Camphene, octachloro-)
- Tribromomethane (Bromoform)
- 1,2,4-Trichlorobenzene (Benzene, 1,2,4-trichloro-)
- 1,1,1-Trichloroethane (Methyl chloroform)
- 1,1,2-Trichloroethane (Ethane, 1,1,2-trichloro-)
- Trichloroethene (Trichloroethylene)
- Trichloromethanethiol (Methanethiol, trichloro-)
- Trichloromonofluoromethane (Methane, trichlorofluoro-) - 2,4,5-Trichlorophenol (Phenol, 2,4,5-trichloro-)
- 2,4,6-Trichlorophenol (Phenol, 2,4,6-trichloro-)
- 2,4,5-Trichlorophenoxyacetic acid (2,4,5-T) (Acetic acid, 2,4,5-trichlorophenoxy-) - 2,4,5-Trichlorophenoxypropionic acid (2,4,5-TP) (Silvex) (Propionoic acid, 2-(2,4,5-trichlorophenoxy)-) - Trichloropropane, N.O.S. 3 (Propane, trichloro-, N.O.S. 3 ) - 1,2,3-Trichloropropane (Propane, 1,2,3-trichloro-)
- O,O,O-Triethyl phosphorothioate (Phosphorothioic acid, O,O,O-triethyl ester) - sym-Trinitrobenzene (Benzene, 1,3,5-trinitro-)
- Tris(1-azridinyl) phosphine sulfide (Phosphine sulfide, tris(1-aziridinyl-) - Tris(2,3-dibromopropyl) phosphate (1-Propanol, 2,3-dibromo-, phosphate) - Trypan blue (2,7-Naphthalenedisulfonic acid, 3,3,-((3,3,-dimethyl (1,1,-biphenyl)- 4,4,diyl)bis(azo))bis(5-amino-4-hydroxy-tetrasodium salt) - Uracil mustard (Uracil-5-[bis(2-chloroethyl]amino)-)
- Uranium and compounds, N.O.S. 3 - Vanadic acid, ammonium salt (ammonium vanadate)
- Vanadium pentoxide (Vanadium (V) oxide)
- Vinyl chloride (Ethene, chloro-)
- Zinc cyanide - Zinc phosphide 3 The abbreviation N.O.S. (not otherwise specified) signifies those members of the general class not specifically listed by name in this list.
PART 19: LICENSES AND RADIATION SAFETY REQUIREMENTS FOR IRRADIATORS LICENSES AND RADIATION SAFETY REQUIREMENTS FOR IRRADIATORS
19.1 Purpose and Scope.
19.1.1 Authority. [Eff 04/01/2007]
Rules and regulations set forth herein are adopted pursuant to the provisions of sections 25-1- 108, 25-1.5-101(1)(l), and 25-11-104, CRS. [Eff 04/01/2007]
19.1.2 Basis and Purpose. [Eff 04/01/2007]
A statement of basis and purpose accompanies this part and changes to this part. A copy may be obtained from the Department. [Eff 04/01/2007]
19.1.3 Scope. [Eff 04/01/2007]
Part 19 contains requirements for the issuance of a license authorizing the use of sealed sources containing radioactive materials in irradiators used to irradiate objects or materials using gamma radiation. Part 19 also contains radiation safety requirements for operating irradiators. [Eff 04/01/2007]
19.1.4 Applicability. [Eff 04/01/2007]
19.1.4.1 The regulations in this part apply to panoramic irradiators that have either dry or wet storage of the radioactive sealed sources and to underwater irradiators in which both the source and the product being irradiated are under water. Irradiators whose dose rates exceed 5 gray (500 rad) per hour at 1 meter from the radioactive sealed sources in air or in water, as applicable for the irradiator type, are covered by this part. [Eff 04/01/2007] 19.1.4.2 The regulations in this part do not apply to self-contained dry-source-storage irradiators (those in which both the source and the area subject to irradiation are contained within a device and are not accessible by personnel), medical radiology or teletherapy, radiography (the irradiation of materials for nondestructive testing purposes), gauging, or open-field (agricultural) irradiations. [Eff 04/01/2007] 19.1.4.3 The requirements of this part are in addition to the requirements of Parts 1, 3, 4, 10, 12, 13, and 17. [Eff 04/01/2007] 19.1.4.4 Nothing in this part relieves the licensee from complying with other applicable Federal, State and local regulations governing the siting, zoning, land use, and building code requirements for industrial facilities. [Eff 04/01/2007]
19.1.5 Published Material Incorporated by Reference. [Eff 04/01/2007]
Published material incorporated in Part 19 by reference is available in accord with Part 1, Section 1.4. [Eff 04/01/2007]
19.2 Definitions.
As used in this part, these terms have the definitions set forth as follows. [Eff 04/01/2007] “Doubly encapsulated sealed source” means a sealed source in which the radioactive material is sealed within a capsule and that capsule is sealed within another capsule. [Eff 04/01/2007] “Irradiator” means a facility that uses radioactive sealed sources for the irradiation of objects or materials and in which radiation dose rates exceeding 5 gray (500 rad) per hour exist at 1 meter from the sealed radioactive sources in air or water, as applicable for the irradiator type, but does not include irradiators in which both the sealed source and the area subject to irradiation are contained within a device and are not accessible to personnel. [Eff 04/01/2007] “Irradiator operator” means an individual who has successfully completed the training and testing described in 19.18 and is authorized by the terms of the license to operate the irradiator without a supervisor present. [Eff 04/01/2007] “Panoramic dry-source-storage irradiator” means an irradiator in which the irradiations occur in air in areas potentially accessible to personnel and in which the sources are stored in shields made of solid materials. The term includes beam-type dry-source-storage irradiators in which only a narrow beam of radiation is produced for performing irradiations. [Eff 04/01/2007] “Panoramic irradiator” means an irradiator in which the irradiations are done in air in areas potentially accessible to personnel. The term includes beam-type irradiators. [Eff 04/01/2007] “Panoramic wet-source-storage irradiator” means an irradiator in which the irradiations occur in air in areas potentially accessible to personnel and in which the sources are stored under water in a storage pool. [Eff 04/01/2007] “Pool irradiator” means any irradiator at which the sources are stored or used in a pool of water including panoramic wet-source-storage irradiators and underwater irradiators. [Eff 04/01/2007] “Product conveyor system” means a system for moving the product to be irradiated to, from, and within the area where irradiation takes place. [Eff 04/01/2007] “Radiation room” means a shielded room in which irradiations take place. Underwater irradiators do not have radiation rooms. [Eff 04/01/2007] “Seismic area” means any area where the probability of a horizontal acceleration in rock of more than 0.3 times the acceleration of gravity in 250 years is greater than 10 percent, as designated by the U.S. Geological Survey. [Eff 04/01/2007] “Underwater irradiator” means an irradiator in which the sources always remain shielded under water and humans do not have access to the sealed sources or the space subject to irradiation without entering the pool. [Eff 04/01/2007] SPECIFIC LICENSING REQUIREMENTS
19.3 Application for a Specific License.
19.3.1 A person shall file an application for a specific license authorizing the use of sealed sources in an irradiator pursuant to 3.8. [Eff 04/01/2007]
19.4 Specific Licenses for Irradiators.
19.4.1 The Department will approve an application for a specific license for the use of licensed material in an irradiator if the applicant meets the requirements contained in this section. [Eff 04/01/2007] 19.4.2 The applicant shall satisfy the general requirements specified in 3.9 of the regulations and the requirements contained in this part. [Eff 04/01/2007] 19.4.3 The applicant must describe the training provided to irradiator operators including: [Eff 04/01/2007]
19.4.3.1 Classroom training; [Eff 04/01/2007]
19.4.3.2 On-the-job or simulator training; [Eff 04/01/2007]
19.4.3.3 Safety reviews; [Eff 04/01/2007]
19.4.3.4 Means employed by the applicant to test each operator’s understanding of the Department’s regulations and licensing requirements and the irradiator operating and emergency procedures; and [Eff 04/01/2007] 19.4.3.5 Minimum training and experience of personnel who may provide training. [Eff 04/01/2007] 19.4.4 The application must include an outline of the written operating and emergency procedures listed in 19.19 that describes the radiation safety aspects of the procedures. [Eff 04/01/2007] 19.4.5 The application must describe the organizational structure for managing the irradiator, specifically the radiation safety responsibilities and authorities of the radiation safety officer and those management personnel who have important radiation safety responsibilities or authorities. [Eff 04/01/2007] 19.4.5.1 In particular, the application must specify who, within the management structure, has authority to stop unsafe operations. [Eff 04/01/2007] 19.4.5.2 The application must also describe the training and experience required for the position of radiation safety officer. [Eff 04/01/2007]
19.4.6 The application must include: [Eff 04/01/2007]
19.4.6.1 A description of the access control systems required by 19.8; [Eff 04/01/2007] 19.4.6.2 A description of the radiation monitors required by 19.11; [Eff 04/01/2007] 19.4.6.3 A description of the method of detecting leaking sources required by 19.22 including the sensitivity of the method; and [Eff 04/01/2007] 19.4.6.4 A diagram of the facility that shows the locations of all required interlocks and radiation monitors. [Eff 04/01/2007] 19.4.7 If the applicant intends to perform leak testing of dry-source-storage sealed sources, the applicant shall establish procedures for leak testing and submit a description of these procedures to the Department. The description shall include the: [Eff 04/01/2007]
19.4.7.1 Instruments to be used; [Eff 04/01/2007]
19.4.7.2 Methods of performing the analysis; and [Eff 04/01/2007]
19.4.7.3 Pertinent experience of the individual who analyzes the samples. [Eff 04/01/2007] 19.4.8 If licensee personnel are to load or unload sources, the applicant shall describe the qualifications and training of the personnel and the procedures to be used. If the applicant intends to contract for source loading or unloading at its facility, the loading or unloading must be done by an organization specifically authorized by the U.S. Nuclear Regulatory Commission or an Agreement State to load or unload irradiator sources. [Eff 04/01/2007] 19.4.9 The applicant shall describe the inspection and maintenance checks, including the frequency of the checks required by 19.23. [Eff 04/01/2007]
19.5 Start of Construction.
19.5.1 The applicant may not begin construction of a new irradiator prior to the submission to the Department of both the application for a license for the irradiator and the fee required by Part 12 of these regulations. [Eff 04/01/2007] 19.5.1.1 As used in this section, the term “construction” includes the construction of any portion of the permanent irradiator structure on the site but does not include: engineering and design work, purchase of a site, site surveys or soil testing, site preparation, site excavation, construction of warehouse or auxiliary structures, and other similar tasks. [Eff 04/01/2007] 19.5.1.2 Any activities undertaken prior to the issuance of a license are entirely at the risk of the applicant and have no bearing on the issuance of a license with respect to the requirements of the Act, and rules, regulations, and orders issued under the Act. [Eff 04/01/2007]
19.6 Applications for Exemptions.
19.6.1 Any application for a license or for amendment of a license authorizing use of a teletherapy-type unit for irradiation of materials or objects may include proposed alternatives for the requirements of this part. The Department will approve the proposed alternatives if the applicant provides adequate rationale for the proposed alternatives and demonstrates that they are likely to provide an adequate level of safety for workers and the public. [Eff 04/01/2007] DESIGN AND PERFORMANCE REQUIREMENTS FOR IRRADIATORS
19.7 Requirements and Performance Criteria for Sealed Sources.
Sealed sources shall: [Eff 04/01/2007] 19.7.1 Have a certificate of registration issued by the U.S. Nuclear Regulatory Commission or an Agreement State, or shall have been evaluated in accordance with 10 CFR 32.210 or the equivalent state regulation; [Eff 04/01/2007]
19.7.2 Be doubly encapsulated; [Eff 04/01/2007]
19.7.3 Use radioactive material that is as nondispersible as practical and that is as insoluble as practical if the source is used in a wet-source-storage or wet-source-change irradiator; [Eff 04/01/2007] 19.7.4 Be encapsulated in a material resistant to general corrosion and to localized corrosion, such as 316L stainless steel or other material with equivalent resistance if the sources are used in irradiator pools; and [Eff 04/01/2007] 19.7.5 Have been leak tested in prototype testing and found leak-free after each of the tests described in
19.7.5.1 through 19.7.5.6. [Eff 04/01/2007]
19.7.5.1 Temperature Test. [Eff 04/01/2007]
19.7.5.2 Pressure Test. [Eff 04/01/2007]
19.7.5.3 Impact Test. [Eff 04/01/2007]
19.7.5.4 Vibration Test. [Eff 04/01/2007]
19.7.5.5 Puncture Test. [Eff 04/01/2007]
19.7.5.6 Bend Test. [Eff 04/01/2007]
19.8 Access Control.
19.8.1 Each entrance to a radiation room at a panoramic irradiator must have a door or other physical barrier to prevent inadvertent entry of personnel if the sources are not in the shielded position. [Eff 04/01/2007] 19.8.1.1 Product conveyor systems may serve as barriers as long as they reliably and consistently function as a barrier. [Eff 04/01/2007] 19.8.1.2 It must not be possible to move the sources out of their shielded position if the door or barrier is open. [Eff 04/01/2007] 19.8.1.3 Opening the door or barrier while the sources are exposed must cause the sources to return promptly to their shielded position. [Eff 04/01/2007] 19.8.1.4 The personnel entrance door or barrier must have a lock that is operated by the same key used to move the sources. [Eff 04/01/2007] 19.8.1.5 The doors and barriers must not prevent any individual in the radiation room from leaving. [Eff 04/01/2007] 19.8.2 In addition, each entrance to a radiation room at a panoramic irradiator must have an independent backup access control to detect personnel entry while the sources are exposed. [Eff 04/01/2007] 19.8.2.1 Detection of entry while the sources are exposed must cause the sources to return to their fully shielded position and must also activate a visible and audible alarm to make the individual entering the room aware of the hazard. [Eff 04/01/2007] 19.8.2.2 The alarm must also alert at least one other individual who is onsite of the entry. That individual shall be trained on how to respond to the alarm and be prepared to promptly render or summon assistance. [Eff 04/01/2007] 19.8.3 A radiation monitor must be provided to detect the presence of high radiation levels in the radiation room of a panoramic irradiator before personnel entry. [Eff 04/01/2007] 19.8.3.1 The monitor must be integrated with personnel access door locks to prevent room access when radiation levels are high. [Eff 04/01/2007] 19.8.3.2 Attempted personnel entry while the monitor measures high radiation levels, must activate the alarm described in 19.8.2. [Eff 04/01/2007] 19.8.3.3 The monitor may be located in the entrance (normally referred to as the maze) but not in the direct radiation beam. [Eff 04/01/2007] 19.8.4 Before the sources move from their shielded position in a panoramic irradiator, the source control must automatically activate conspicuous visible and audible alarms to alert people in the radiation room that the sources will be moved from their shielded position. [Eff 04/01/2007] 19.8.4.1 The alarms must give individuals enough time to leave the room before the sources leave the shielded position. [Eff 04/01/2007] 19.8.5 Each radiation room at a panoramic irradiator must have a clearly visible and readily accessible control that would allow an individual in the room to make the sources return to their fully shielded position. [Eff 04/01/2007] 19.8.6 Each radiation room of a panoramic irradiator must contain a control that prevents the sources from moving from the shielded position unless the control has been activated and the door or barrier to the radiation room has been closed within a preset time after activation of the control. [Eff 04/01/2007] 19.8.7 Each entrance to the radiation room of a panoramic irradiator and each entrance to the area within the personnel access barrier of an underwater irradiator must be posted as required by 4.28. [Eff 04/01/2007] 19.8.7.1 Radiation postings for panoramic irradiators must comply with the posting requirements of 4.28, except that signs may be removed, covered, or otherwise made inoperative when the sources are fully shielded. [Eff 04/01/2007] 19.8.8 If the radiation room of a panoramic irradiator has roof plugs or other movable shielding, it must not be possible to operate the irradiator unless the shielding is in its proper location. [Eff 04/01/2007] 19.8.8.1 This requirement may be met by interlocks that prevent operation if shielding is not placed properly or by an operating procedure requiring inspection of shielding before operating. [Eff 04/01/2007] 19.8.9 Underwater irradiators must have a personnel access barrier around the pool which must be locked to prevent access when the irradiator is not attended. [Eff 04/01/2007] 19.8.9.1 Only operators and facility management may have access to keys to the personnel access barrier. [Eff 04/01/2007] 19.8.9.2 An intrusion alarm shall be installed to detect unauthorized entry when the personnel access barrier is locked. [Eff 04/01/2007] 19.8.9.3 Activation of the intrusion alarm must alert an individual (not necessarily onsite) who is prepared to respond or summon assistance. [Eff 04/01/2007]
19.9 Shielding.
19.9.1 The radiation dose rate in areas that are normally occupied during operation of a panoramic irradiator may not exceed 0.02 millisievert (2 millirem) per hour at any location 30 centimeters or more from the wall of the room when the sources are exposed. [Eff 04/01/2007] 19.9.9.1 The dose rate must be averaged over an area not to exceed 100 square centimeters having no linear dimension greater than 20 centimeters. [Eff 04/01/2007] 19.9.9.2 Areas where the radiation dose rate exceeds 0.02 millisievert (2 millirem) per hour must be locked, roped off, or posted. [Eff 04/01/2007] 19.9.2 The radiation dose at 30 centimeters over the edge of the pool of a pool irradiator may not exceed 0.02 millisievert (2 millirem) per hour when the sources are in the fully shielded position. [Eff 04/01/2007] 19.9.3 The radiation dose rate at 1 meter from the shield of a dry-source-storage panoramic irradiator when the source is shielded may not exceed 0.02 millisievert (2 millirem) per hour and at 5 centimeters from the shield may not exceed 0.2 millisievert (20 millirem) per hour. [Eff 04/01/2007]
19.10 Fire Protection.
19.10.1 The radiation room at a panoramic irradiator must have heat and smoke detectors. [Eff 04/01/2007]
19.10.1.1 The detectors must activate an audible alarm. [Eff 04/01/2007]
19.10.1.2 The alarm must be capable of alerting a person who is prepared to summon assistance promptly. [Eff 04/01/2007] 19.10.1.3 The sources must automatically become fully shielded if a fire is detected. [Eff 04/01/2007] 19.10.2 The radiation room at a panoramic irradiator must be equipped with a fire extinguishing system capable of extinguishing a fire without the entry of personnel into the room. [Eff 04/01/2007] 19.10.2.1 The system for the radiation room must have a shut-off valve to control flooding into unrestricted areas. [Eff 04/01/2007]
19.11 Radiation Monitors.
19.11.1 Irradiators with automatic product conveyor systems must have a radiation monitor with an audible alarm located to detect loose radioactive sources that are carried toward the product exit. [Eff 04/01/2007] 19.11.1.1 If the monitor detects a source, an alarm must sound and product conveyors must stop automatically. [Eff 04/01/2007] 19.11.1.2 The alarm must be capable of alerting an individual in the facility who is prepared to summon assistance. [Eff 04/01/2007] 19.11.1.3 Underwater irradiators in which the product moves within an enclosed stationary tube are exempt from the requirements of this paragraph. [Eff 04/01/2007] 19.11.2 Underwater irradiators that are not in a shielded radiation room must have a radiation monitor over the pool to detect abnormal radiation levels. [Eff 04/01/2007] 19.11.2.1 The monitor must have an audible alarm and a visible indicator at entrances to the personnel access barrier around the pool. [Eff 04/01/2007] 19.11.2.2 The audible alarm may have a manual shut-off. The alarm must be capable of alerting an individual who is prepared to respond promptly. [Eff 04/01/2007]
19.12 Control of Source Movement.
19.12.1 The mechanism that moves the sources of a panoramic irradiator must require a key to actuate. [Eff 04/01/2007] 19.12.1.1 Actuation of the mechanism must cause an audible signal to indicate that the sources are leaving the shielded position. [Eff 04/01/2007] 19.12.1.2 Only one key may be used at any time, and only one operator or facility management may possess it. [Eff 04/01/2007] 19.12.1.3 The key must be attached to a portable radiation survey meter by a chain or cable. [Eff 04/01/2007] 19.12.1.4 The lock for source control must be designed so that the key may not be removed if the sources are in an unshielded position. [Eff 04/01/2007] 19.12.1.5 The door to the radiation room must require the same key. [Eff 04/01/2007] 19.12.2 The console of a panoramic irradiator must have a source position indicator that indicates when the sources are in the fully shielded position, when they are in transit, and when the sources are exposed. [Eff 04/01/2007] 19.12.3 The control console of a panoramic irradiator must have a control that promptly returns the sources to the shielded position. [Eff 04/01/2007] 19.12.4 Each control for a panoramic irradiator must be clearly marked as to its function. [Eff 04/01/2007]
19.13 Irradiator Pools.
19.13.1 Irradiator pools must either: [Eff 04/01/2007]
19.13.1.1 Have a water-tight stainless steel liner or a liner metallurgically compatible with other components in the pool; or [Eff 04/01/2007] 19.13.1.2 Be constructed so that there is a low likelihood of substantial leakage and have a surface designed to facilitate decontamination. [Eff 04/01/2007] 19.13.1.3 In either case, the licensee shall have a method to safely store the sources during repairs of the pool. [Eff 04/01/2007] 19.13.2 Irradiator pools must have no outlets more than 0.5 meter below the normal low water level that could allow water to drain out of the pool. [Eff 04/01/2007] 19.13.2.1 Pipes that have intakes more than 0.5 meter below the normal low water level and that could act as siphons must have siphon breakers to prevent the siphoning of pool water. [Eff 04/01/2007] 19.13.3 A means must be provided to replenish water losses from the pool. [Eff 04/01/2007] 19.13.4 A visible indicator must be provided in a clearly visible location to indicate if the pool water level is below the normal low water level or above the normal high water level. [Eff 04/01/2007] 19.13.5 Irradiator pools must be equipped with a purification system designed to be capable of maintaining the water during normal operation at a conductivity of 20 microsiemens per centimeter or less and with a clarity so that the sources can be seen clearly. [Eff 04/01/2007] 19.13.6 A physical barrier, such as a railing or cover, must be used around or over irradiator pools during normal operation to prevent personnel from accidentally falling into the pool. [Eff 04/01/2007] 19.13.6.1 The barrier may be removed during maintenance, inspection, and service operations. [Eff 04/01/2007] 19.13.7 If long-handled tools or poles are used in irradiator pools, the radiation dose rate on the handling areas of the tools may not exceed 0.02 millisievert (2 millirem) per hour. [Eff 04/01/2007]
19.14 Source Rack Protection.
19.14.1 If the product to be irradiated moves on a product conveyor system, the source rack and the mechanism that moves the rack must be protected by a barrier or guides to prevent products and product carriers from hitting or touching the rack or mechanism. [Eff 04/01/2007]
19.15 Power Failures.
19.15.1 If electrical power at a panoramic irradiator is lost for longer than 10 seconds, the sources must automatically return to the shielded position. [Eff 04/01/2007] 19.15.2 The lock on the door of the radiation room of a panoramic irradiator may not be deactivated by a power failure. [Eff 04/01/2007] 19.15.3 During a power failure, the area of any irradiator where sources are located may be entered only when using an operable and calibrated radiation survey meter. [Eff 04/01/2007]
19.16 Design Requirements.
19.16.1 Irradiators must meet the design requirements of this section. [Eff 04/01/2007]
19.16.1.1 Shielding. [Eff 04/01/2007]
19.16.1.2 Foundations. [Eff 04/01/2007]
19.16.1.3 Pool Integrity. [Eff 04/01/2007]
19.16.1.4 Water Handling System. [Eff 04/01/2007]
19.16.1.5 Radiation Monitors. [Eff 04/01/2007]
19.16.1.6 Source Rack. [Eff 04/01/2007]
19.16.1.7 Access Control. [Eff 04/01/2007]
19.16.1.8 Fire Protection. [Eff 04/01/2007]
19.16.1.9 Source Return. [Eff 04/01/2007]
19.16.1.10 Seismic. [Eff 04/01/2007]
19.16.1.11 Wiring. [Eff 04/01/2007]
19.17 Construction Monitoring and Acceptance Testing.
19.17.1 The requirements of this section must be met for all irradiators subject to this part prior to loading sources. [Eff 04/01/2007]
19.17.1.1 Shielding. [Eff 04/01/2007]
19.17.1.2 Foundations. [Eff 04/01/2007]
19.17.1.3 Pool Integrity. [Eff 04/01/2007]
19.17.1.4 Water Handling System. [Eff 04/01/2007]
19.17.1.5 Radiation Monitors. [Eff 04/01/2007]
19.17.1.6 Source Rack. [Eff 04/01/2007]
19.17.1.7 Access Control. [Eff 04/01/2007]
19.17.1.8 Fire Protection. [Eff 04/01/2007]
19.17.1.9 Source Return. [Eff 04/01/2007]
19.17.1.10 Computer Systems. [Eff 04/01/2007]
19.17.1.11 Wiring. [Eff 04/01/2007]
19.18 Training.
19.18.1 Before an individual is permitted to operate an irradiator without a supervisor present, the individual must be instructed in: [Eff 04/01/2007] 19.18.1.1 The fundamentals of radiation protection applied to irradiators (including the differences between external radiation and radioactive contamination, units of radiation dose, Department dose limits, why large radiation doses must be avoided, how shielding and access controls prevent large doses, how an irradiator is designed to prevent contamination, the proper use of survey meters and personnel dosimeters, other radiation safety features of an irradiator, and the basic function of the irradiator); [Eff 04/01/2007] 19.18.1.2 The requirements of Parts 4, 10 and 19 that are relevant to the irradiator; [Eff 04/01/2007]
19.18.1.3 The operation of the irradiator; [Eff 04/01/2007]
19.18.1.4 Those operating and emergency procedures listed in 19.19 that the individual is responsible for performing; and [Eff 04/01/2007] 19.18.1.5 Case histories of accidents or problems involving irradiators. [Eff 04/01/2007] 19.18.2 Before an individual is permitted to operate an irradiator without a supervisor present, the individual shall pass a written test on the instruction received consisting primarily of questions based on the licensee’s operating and emergency procedures that the individual is responsible for performing and other operations necessary to safely operate the irradiator without supervision. [Eff 04/01/2007] 19.18.3 Before an individual is permitted to operate an irradiator without a supervisor present, the individual must have received on-the-job training or simulator training in the use of the irradiator as described in the license application. [Eff 04/01/2007] 19.18.3.1 The individual shall also demonstrate the ability to perform those portions of the operating procedures that he or she is to perform. [Eff 04/01/2007] 19.18.4 The licensee shall conduct safety reviews for irradiator operators at least annually. [Eff 04/01/2007] 19.18.4.1 The licensee shall give each operator a brief written test on the information. [Eff 04/01/2007] 19.18.4.2 Each safety review must include, to the extent appropriate, each of the following: [Eff 04/01/2007]
19.18.5 The licensee shall evaluate the safety performance of each irradiator operator at least annually to ensure that regulations, license conditions, and operating and emergency procedures are followed and shall: [Eff 04/01/2007] 19.18.5.1 Discuss the results of the evaluation with the operator; and [Eff 04/01/2007] 19.18.5.2 Instruct the operator on how to correct any mistakes or deficiencies observed. [Eff 04/01/2007] 19.18.6 Individuals who will be permitted unescorted access to the radiation room of the irradiator or the area around the pool of an underwater irradiator, but who have not received the training required for operators and the radiation safety officer, shall be instructed and tested in any precautions they should take to avoid radiation exposure, any procedures or parts of procedures listed in 19.19 that they are expected to perform or comply with, and their proper response to alarms required in this part. Tests may be oral. [Eff 04/01/2007] 19.18.7 Individuals who must be prepared to respond to alarms required by 19.8.2, 19.8.9, 19.10.1, 19.11.1, 19.11.2, and 19.22.2 shall be trained and tested on how to respond. [Eff 04/01/2007] 19.18.7.1 Each individual shall be retested at least once a year. [Eff 04/01/2007]
19.18.7.2 Tests may be oral. [Eff 04/01/2007]
19.19 Operating and Emergency Procedures.
19.19.1 The licensee shall have and follow written operating procedures for: [Eff 04/01/2007] 19.19.1.1 Operation of the irradiator, including entering and leaving the radiation room; [Eff 04/01/2007]
19.19.1.2 Use of personnel dosimeters; [Eff 04/01/2007]
19.19.1.3 Surveying the shielding of panoramic irradiators; [Eff 04/01/2007]
19.19.1.4 Monitoring pool water for contamination while the water is in the pool and before release of pool water to unrestricted areas; [Eff 04/01/2007]
19.19.1.5 Leak testing of sources; [Eff 04/01/2007]
19.19.1.6 Inspection and maintenance checks required by 19.23; [Eff 04/01/2007]
19.19.1.7 Loading, unloading, and repositioning sources, if the operations will be performed by the licensee; and [Eff 04/01/2007] 19.19.1.8 Inspection of movable shielding required by 19.8.8, if applicable. [Eff 04/01/2007] 19.19.2 The licensee shall have and follow emergency or abnormal event procedures, appropriate for the irradiator type, for: [Eff 04/01/2007]
19.19.2.1 Sources stuck in the unshielded position; [Eff 04/01/2007]
19.19.2.2 Personnel overexposures; [Eff 04/01/2007]
19.19.2.3 A radiation alarm from the product exit portal monitor or pool monitor; [Eff 04/01/2007] 19.19.2.4 Detection of leaking sources, pool contamination, or alarm caused by contamination of pool water; [Eff 04/01/2007] 19.19.2.5 A low or high water level indicator, an abnormal water loss, or leakage from the source storage pool; [Eff 04/01/2007]
19.19.2.6 A prolonged loss of electrical power; [Eff 04/01/2007]
19.19.2.7 A fire alarm or explosion in the radiation room; [Eff 04/01/2007]
19.19.2.8 An alarm indicating unauthorized entry into the radiation room, area around the pool, or another alarmed area; [Eff 04/01/2007] 19.19.2.9 Natural phenomena, including an earthquake, a tornado, flooding, or other phenomena as appropriate for the geographical location of the facility; and [Eff 04/01/2007]
19.19.2.10 The jamming of automatic conveyor systems. [Eff 04/01/2007]
19.19.3 The licensee may revise operating and emergency procedures without Department approval only if all of the following conditions are met: [Eff 04/01/2007] 19.19.3.1 The revisions do not reduce the safety of the facility; [Eff 04/01/2007] 19.19.3.2 The revisions are consistent with the outline or summary of procedures submitted with the license application; [Eff 04/01/2007] 19.19.3.3 The revisions have been reviewed and approved by the radiation safety officer; and [Eff 04/01/2007] 19.19.3.4 The users or operators are instructed and tested on the revised procedures before they are put into use. [Eff 04/01/2007]
19.20 Personnel Monitoring.
19.20.1 Irradiator operators shall wear a personnel dosimeter that is processed and evaluated by an accredited National Voluntary Laboratory Accreditation Program (NVLAP) processor while operating a panoramic irradiator or while in the area around the pool of an underwater irradiator. [Eff 04/01/2007] 19.20.1.1 The personnel dosimeter processor must be accredited for high-energy photons in the normal and accident dose ranges (see 4.17.3). [Eff 04/01/2007] 19.20.1.2 Each personnel dosimeter must be assigned to and worn by only one individual. [Eff 04/01/2007] 19.20.1.3 Film badges must be replaced at least monthly and each other personnel dosimeter must be replaced at least quarterly. [Eff 04/01/2007] 19.20.1.4 After replacement, each personnel dosimeter must be promptly processed. [Eff 04/01/2007] 19.20.2 Other individuals who enter the radiation room of a panoramic irradiator shall wear a dosimeter, which may be a pocket dosimeter. [Eff 04/01/2007] 19.20.2.1 For groups of visitors, only two people who enter the radiation room are required to wear dosimeters. [Eff 04/01/2007] 19.20.2.2 If pocket dosimeters are used to meet the requirements of this paragraph, a check of their response to radiation must be done at least annually. [Eff 04/01/2007] 19.20.2.3 Acceptable dosimeters must read within + or – 20 percent of the true radiation dose. [Eff 04/01/2007]
19.21 Radiation Surveys.
19.21.1 A radiation survey of the area outside the shielding of the radiation room of a panoramic irradiator must be conducted with the sources in the exposed position before the facility starts to operate. [Eff 04/01/2007] 19.21.1.1 A radiation survey of the area above the pool of pool irradiators must be conducted after the sources are loaded but before the facility starts to operate. [Eff 04/01/2007] 19.21.1.2 Additional radiation surveys of the shielding must be performed at intervals not to exceed 3 years and before resuming operation after addition of new sources or any modification to the radiation room shielding or structure that might increase dose rates. [Eff 04/01/2007] 19.21.2 If the radiation levels specified in 19.9 are exceeded, the facility must be modified to comply with the requirements in 19.9. [Eff 04/01/2007] 19.21.3 Portable radiation survey meters must be calibrated at least annually to an accuracy of 20 percent for the gamma energy of the sources in use. [Eff 04/01/2007] 19.21.3.1 The calibration must be done at two points on each scale or, for digital instruments at one point per decade over the range that will be used. [Eff 04/01/2007] 19.21.3.2 Portable radiation survey meters must be of a type that does not saturate and read zero at high radiation dose rates. [Eff 04/01/2007] 19.21.4 Water from the irradiator pool, other potentially contaminated liquids, and sediments from pool vacuuming must be monitored for radioactive contamination before release to unrestricted areas. Radioactive concentrations must not exceed those specified in Part 4, Appendix 4B, Table 4B1, “Annual Limits on Intakes (ALIs) and Derived Air Concentrations (DACs)” , or Table 4B3, “Release to Sewers.” [Eff 04/01/2007] 19.21.5 Before releasing resins for unrestricted use, they must be monitored before release in an area with a background level less than 0.5 microsievert (0.05 millirem) per hour. [Eff 04/01/2007] 19.21.5.1 The resins may be released only if the survey does not detect radiation levels above background levels. [Eff 04/01/2007] 19.21.5.2 The survey meter used must be capable of detecting radiation levels of 0.5 microsievert (0.05 millirem) per hour. [Eff 04/01/2007]
19.22 Detection of Leaking Sources.
19.22.1 Each dry-source-storage sealed source must be tested for leakage at intervals not to exceed 6 months using a leak test kit or method approved by the U.S. Nuclear Regulatory Commission or an Agreement State. [Eff 04/01/2007] 19.22.1.1 In the absence of a certificate from a transferor that a test has been made within the 6 months before the transfer, the sealed source may not be used until tested. [Eff 04/01/2007] 19.22.1.2 The test must be capable of detecting the presence of 200 becquerel (0.005 microcurie) of radioactive material and must be performed by a person approved by the U.S. Nuclear Regulatory Commission or an Agreement State to perform the test. [Eff 04/01/2007] 19.22.2 For pool irradiators, sources may not be put into the pool unless the licensee tests the sources for leaks or has a certificate from a transferor that a leak test has been done within the 6 months before the transfer. [Eff 04/01/2007] 19.22.2.1 Water from the pool must be checked for contamination each day the irradiator operates. This check may be done either by using a radiation monitor on a pool water circulating system or by analysis of a sample of pool water. [Eff 04/01/2007] 19.22.2.2 If a check for contamination is done by analysis of a sample of pool water, the results must be available within 24 hours. [Eff 04/01/2007] 19.22.2.3 If the licensee uses a radiation monitor on a pool water circulating system, the detection of above normal radiation levels must activate an alarm. [Eff 04/01/2007]
19.22.3 If a leaking source is detected, the licensee shall arrange to remove the leaking source from service and have it decontaminated, repaired, or disposed of by a U.S. Nuclear Regulatory Commission or Agreement State licensee that is authorized to perform these functions. [Eff 04/01/2007] 19.22.3.1 The licensee shall promptly check its personnel, equipment, facilities, and irradiated product for radioactive contamination. [Eff 04/01/2007] 19.22.3.2 No product may be shipped until the product has been checked and found free of contamination. [Eff 04/01/2007] 19.22.3.3 If a product has been shipped that may have been inadvertently contaminated, the licensee shall arrange to locate and survey that product for contamination. [Eff 04/01/2007] 19.22.3.4 If any personnel are found to be contaminated, decontamination must be performed promptly. [Eff 04/01/2007] 19.22.3.5 If contaminated equipment, facilities, or products are found, the licensee shall arrange to have them decontaminated or disposed of by a U.S. Nuclear Regulatory Commission or Agreement State licensee that is authorized to perform these functions. [Eff 04/01/2007] 19.22.3.6 If a pool is contaminated, the licensee shall arrange to clean the pool until the water contamination levels do not exceed the appropriate concentration in Part 4, Appendix 4B, Table 4B2, Column 2 (See 4.52 and 4.53 for notification and reporting requirements). [Eff 04/01/2007]
19.23 Inspection and Maintenance.
19.23.1 The licensee shall perform inspection and maintenance checks that include, as a minimum, each of the following at the frequency specified in the license or license application: [Eff 04/01/2007] 19.23.1.1 Operability of each aspect of the access control system required by 19.8; [Eff 04/01/2007] 19.23.1.2 Functioning of the source position indicator required by 19.12.2; [Eff 04/01/2007] 19.23.1.3 Operability of the radiation monitor for radioactive contamination in pool water required by 19.22.2, using a radiation check source, if applicable; [Eff 04/01/2007] 19.23.1.4 Operability of the over-pool radiation monitor at underwater irradiators as required by 19.11.2; [Eff 04/01/2007] 19.23.1.5 Operability of the product exit monitor required by 19.11.1; [Eff 04/01/2007] 19.23.1.6 Operability of the emergency source return control required by 19.12.3; [Eff 04/01/2007] 19.23.1.7 Leak-tightness of systems through which pool water circulates (visual inspection); [Eff 04/01/2007] 19.23.1.8 Operability of the heat and smoke detectors and extinguisher system required by 19.10 (but without turning extinguishers on); [Eff 04/01/2007] 19.23.1.9 Operability of the means of pool water replenishment required by 19.13.3; [Eff 04/01/2007] 19.23.1.10 Operability of the indicators of high and low pool water levels required by 19.13.4; [Eff 04/01/2007] 19.23.1.11 Operability of the intrusion alarm required by 19.8.9, if applicable; [Eff 04/01/2007] 19.23.1.12 Functioning and wear of the system, mechanisms and cables used to raise and lower sources; [Eff 04/01/2007] 19.23.1.13 Condition of the barrier to prevent products from hitting the sources or source mechanism as required by 19.14; [Eff 04/01/2007] 19.23.1.14 Amount of water added to the pool to determine if the pool is leaking; [Eff 04/01/2007] 19.23.1.15 Electrical wiring on required safety systems for radiation damage; and [Eff 04/01/2007] 19.23.1.16 Pool water conductivity measurements and analysis as required by 19.24.2. [Eff 04/01/2007] 19.23.2 Malfunctions and defects found during inspection and maintenance checks must be repaired without undue delay. [Eff 04/01/2007]
19.24 Pool Water Purity.
19.24.1 Pool water purification system must be run sufficiently to maintain the conductivity of the pool water below 20 microsiemens per centimeter under normal circumstances. [Eff 04/01/2007] 19.24.1.1 If pool water conductivity rises above 20 microsiemens per centimeter, the licensee shall take prompt actions to lower the pool water conductivity and shall take corrective actions to prevent future recurrences. [Eff 04/01/2007] 19.24.2 The licensee shall measure the pool water conductivity frequently enough, but no less than weekly, to assure that the conductivity remains below 20 microsiemens per centimeter. Conductivity instruments must be calibrated at least annually. [Eff 04/01/2007]
19.25 Attendance During Operations.
19.25.1 Both an irradiator operator and at least one individual, who is trained on how to respond and prepared to promptly render or summon assistance if the access control alarm sounds, shall be present onsite: [Eff 04/01/2007] 19.25.1.1 Whenever the irradiator is operated using an automatic product conveyor system; and [Eff 04/01/2007] 19.25.1.2 Whenever the product is moved into or out of the radiation room when the irradiator is operated in a batch mode. [Eff 04/01/2007] 19.25.2 At a panoramic irradiator at which static irradiations (no movement of the product) are occurring, an individual who has received the training required in 19.18.7 on how to respond to alarms must be onsite. [Eff 04/01/2007] 19.25.3 At an underwater irradiator, an irradiator operator must be present at the facility whenever the product is moved into or out of the pool. [Eff 04/01/2007] 19.25.3.1 An individual who moves the product into or out of the pool of an underwater irradiator need not be qualified as an irradiator operator; however, each such individual shall have received the training required in 19.18.6 and 19.18.7. [Eff 04/01/2007]
19.26 Entering and Leaving the Irradiation Room.
19.26.1 Upon first entering the radiation room of a panoramic irradiator after an irradiation, the irradiator operator shall use a survey meter to determine that the source has returned to its fully shielded position. [Eff 04/01/2007] 19.26.1.1 The operator shall check the functioning of the survey meter with a radiation check source prior to entry. [Eff 04/01/2007] 19.26.2 Before exiting from and locking the door to the radiation room of a panoramic irradiator prior to a planned irradiation, the irradiator operator shall: [Eff 04/01/2007] 19.26.2.1 Visually inspect the entire radiation room to verify that no one else is in it; and [Eff 04/01/2007] 19.26.2.2 Activate a control in the radiation room that permits the sources to be moved from the shielded position only if the door to the radiation room is locked within a preset time after setting the control. [Eff 04/01/2007] 19.26.3 During a power failure, the area around the pool of an underwater irradiator may not be entered without using an operable and calibrated radiation survey meter unless the over-the-pool monitor required by 19.11.2 is operating with backup power. [Eff 04/01/2007]
19.27 Irradiation of Explosive or Flammable Materials.
19.27.1 Irradiation of explosive material is prohibited unless the licensee has received prior written authorization from the Department. [Eff 04/01/2007] 19.27.1.1 Authorization will not be granted unless the licensee can demonstrate that detonation of the explosive would not rupture the sealed sources, injure personnel, damage safety systems, or cause radiation overexposures of personnel. [Eff 04/01/2007] 19.27.2 Irradiation of more than small quantities of flammable material (flash point below 140°C) is prohibited in panoramic irradiators unless the licensee has received prior written authorization from the Department. [Eff 04/01/2007] 19.27.2.1 Authorization will not be granted unless the licensee can demonstrate that a fire in the radiation room could be controlled without damage to the sealed sources or safety systems and without radiation overexposures of personnel. [Eff 04/01/2007] RECORDS AND REPORTS
19.28 Records and Retention Periods.
19.28.1 The licensee shall maintain the following records at the irradiator for the periods specified: [Eff 04/01/2007] 19.28.1.1 A copy of the license, license conditions, documents incorporated into a license by reference, and amendments thereto until superseded by new documents or until the Department terminates the license for documents not superseded; [Eff 04/01/2007] 19.28.1.2 Records of each individual’s training, tests, and safety reviews provided to meet the requirements of 19.18.1, 19.18.2, 19.18.3, 19.18.4, 19.18.6, and 19.18.7 until 3 years after the individual terminates work; [Eff 04/01/2007] 19.28.1.3 Records of the annual evaluations of the safety performance of irradiator operators required by 19.18.5 for 3 years after the evaluation; [Eff 04/01/2007] 19.28.1.4 A copy of the current operating and emergency procedures required by 19.19 until superseded or the Department terminates the license. Records of the radiation safety officer’s review and approval of changes in procedures as required by 19.19.3.3 retained for 3 years from the date of the change; [Eff 04/01/2007] 19.28.1.5 Evaluations of personnel dosimetry (film badge, optically stimulated luminescence and thermoluminescence dosimeter) required by 19.20 in accordance with 4.46; [Eff 04/01/2007] 19.28.1.6 Records of radiation surveys required by 19.21 for 3 years from the date of the survey; [Eff 04/01/2007] 19.28.1.7 Records of radiation survey meter calibrations required by 19.21.3 and pool water conductivity meter calibrations required by 19.24.2 until 3 years from the date of calibration; [Eff 04/01/2007] 19.28.1.8 Records of the results of leak tests required by 19.22.1 and the results of contamination checks required by 19.22.2 for 3 years from the date of each test; [Eff 04/01/2007] 19.28.1.9 Records of inspection and maintenance checks required by 19.23 for 3 years; [Eff 04/01/2007] 19.28.1.10 Records of major malfunctions, significant defects, operating difficulties or irregularities, and major operating problems that involve required radiation safety equipment for 3 years after repairs are completed; [Eff 04/01/2007] 19.28.1.11 Records of the receipt, transfer, and disposal of all licensed sealed sources as required by 3.22 and 4.48; [Eff 04/01/2007] 19.28.1.12 Records on the design checks required by 19.16 and the construction control checks as required by 19.17 until the license is terminated. The records must be signed and dated. The title or qualification of the person signing must be included; and [Eff 04/01/2007] 19.28.1.13 Records related to decommissioning of the irradiator as required by 3.16.6.8. [Eff 04/01/2007]
19.29 Reports.
19.29.1 In addition to the reporting requirements in other parts of the regulations, the licensee shall report the following events: [Eff 04/01/2007]
19.29.1.1 Source stuck in an unshielded position; [Eff 04/01/2007]
19.29.1.2 Any fire or explosion in a radiation room; [Eff 04/01/2007]
19.29.1.3 Damage to the source racks; [Eff 04/01/2007]
19.29.1.4 Failure of the cable or drive mechanism used to move the source racks; [Eff 04/01/2007]
19.29.1.5 Inoperability of the access control system; [Eff 04/01/2007]
19.29.1.6 Detection of radiation source by the product exit monitor; [Eff 04/01/2007] 19.29.1.7 Detection of radioactive contamination attributable to licensed radioactive material; [Eff 04/01/2007]
19.29.1.8 Structural damage to the pool liner or walls; [Eff 04/01/2007]
19.29.1.9 Abnormal water loss or leakage from the source storage pool; or [Eff 04/01/2007] 19.29.1.10 Pool water conductivity exceeding 100 microsiemen per centimeter. [Eff 04/01/2007] 19.29.2 The report must include a telephone report within 24 hours as described in 4.52.2, and a written report within 30 days as described in 4.53.1.2. [Eff 04/01/2007] PART 20 : PARTICLE ACCELERATORS AND THERAPEUTIC RADIATION MACHINES IN THE HEALING ARTS PARTICLE ACCELERATORS AND THERAPEUTIC RADIATION MACHINES IN THE HEALING ARTS RH 20.1 Purpose and Scope.
20.1.1 This Part establishes requirements, for which the registrant is responsible, for use of particle accelerators and therapeutic radiation machines in the healing arts. The provisions of this Part are in addition to, and not in substitution for, other applicable provisions of these Regulations.
20.1.2 The use of therapeutic radiation machines for human use shall be by, or under the direct or general supervision of, a licensed practitioner of the healing arts who meets the training and experience criteria established by RH 20.3.1 20.1.3 The use of therapeutic radiation machines for veterinary applications shall be by, or under the direct or general supervision of a licensed veterinarian. RH 20.2 Definitions.
As used in this Part, the following definitions apply:
“Absorbed dose (D)” means the mean energy imparted by ionizing radiation to matter. Absorbed dose is determined as the quotient of dE by dM, where dE is the mean energy imparted by ionizing radiation to matter of mass dM. The Sl unit of absorbed dose is joule per kilogram and the name of the unit of absorbed dose is the gray (Gy). The previously used unit of absorbed dose, the rad, is being replaced by the gray.
“Absorbed dose rate” means absorbed dose per unit time, for machines with timers, or dose monitor unit per unit time for linear accelerators.
“Air kerma (K)” means the kinetic energy released in air by ionizing radiation. Kerma is determined as the quotient of dE by dM, where dE is the sum of the initial kinetic energies of all the charged ionizing particles (electrons) liberated by uncharged ionizing particles (photons) in air of mass dM. The Sl unit of air kerma is joule per kilogram and the special name for the unit of kerma is the gray (Gy).
“Authorized user” means a practitioner of the healing arts who is authorized to prescribe and/or administer the radiation therapy treatment to the patients. “Beam-limiting device” means a field defining collimator, integral to the therapeutic radiation machine, which provides a means to restrict the dimensions of the useful beam. “Beam monitoring system” means a system designed and installed in the radiation head to detect and measure the radiation present in the useful beam.
“Beam scattering foil” means a thin piece of material (usually metallic) placed in the beam to scatter a beam of electrons in order to provide a more uniform electron distribution in the useful beam.
“Contact therapy system” means a therapeutic radiation machine with a short target to skin distance (TSD), usually less than five (5) centimeters. “Dose monitor unit (DMU)” means a unit response from the beam monitoring system from which the absorbed dose can be calculated.
“External beam radiation therapy” means therapeutic irradiation in which the source of radiation is at a distance from the body.
“Field-flattening filter” means a filter used to homogenize the absorbed dose rate over the radiation field.
“Filter” means material placed in the useful beam to change beam quality in therapeutic radiation machines subject to RH 20.7.
“Gantry” means that part of a radiation therapy system supporting and allowing movements of the radiation head about a center of rotation.
“Gray(Gy)” means the Sl unit of absorbed dose, kerma, and specific energy imparted equal to 1 joule per kilogram. The previous unit of absorbed dose (rad) is being replaced by the gray. 1 Gy=100 rad.
“Interlock” means a device preventing the start or continued operation of equipment unless certain predetermined conditions exist.
“Interruption of irradiation” means the stopping of irradiation with the possibility of continuing irradiation without resetting of operating conditions at the control panel. “Isocenter” means the center of the sphere through which the useful beam axis passes while the gantry moves through its full range of motions.
“Kilo electron volt (keV)” means the energy equal to that acquired by a particle with one electron charge in passing through a potential difference of one thousand volts in a vacuum. “Kilovolt (kV)” (Thousand volts) is a unit used to measure the nominal accelerating potential of charged particles used to create an x-ray beam.
“Leakage radiation” means radiation emanating from the radiation therapy system except for the useful beam.
“Light field” means the area illuminated by light, simulating the radiation field. “Mega electron volt (MeV)” means the energy equal to that acquired by a particle with one electron charge in passing through a potential difference of one million volts in a vacuum. AMegavolt (MV)@(Million volts) is a unit used to measure the nominal accelerating potential of charged particles used to create an x-ray beam.
“Moving beam radiation therapy” means radiation therapy with any planned displacement of radiation field or patient relative to each other, or with any planned change of absorbed dose distribution. It includes arc, skip, conformal, intensity modulation and rotational therapy. “Nominal treatment distance” means:
“Periodic quality assurance check” means a procedure which is performed periodically to ensure that a previous calibration continues to be valid.
“Primary dose monitoring system” means a system which will monitor the useful beam during irradiation and which will terminate irradiation when a pre-selected number of dose monitor units have been delivered.
“Radiation head” means the structure from which the useful beam emerges. “Radiation Therapy Physicist” means a qualified expert in accordance with RH 20.3.2 “Redundant beam monitoring system” means a combination of two dose monitoring systems in which each system is designed to terminate irradiation in accordance with a pre-selected number of dose monitor units.
“Shadow tray” means a device attached to the radiation head to support auxiliary beam blocking material.
“Sievert (Sv)” means the Sl unit of dose equivalent. The unit of dose equivalent is the joule per kilogram. The previous unit of dose equivalent (rem) is being replaced by the Sievert. 1 Sv=100 rem.
“Simulator (radiation therapy simulation system)” means any x-ray system intended for localizing the volume to be exposed during radiation therapy and reproducing the position and size of the therapeutic irradiation field.
“Stationary beam radiation therapy” means radiation therapy without displacement of one or more mechanical axes relative to the patient during irradiation. “Target” means that part of an x-ray tube or accelerator onto which a beam of accelerated particles is directed to produce ionizing radiation or other particles. “Target-skin distance (TSD)” means the distance measured along the beam axis from the center of the front surface of the x-ray target or the nominal position of the electron source to the surface of the irradiated object or patient.
“Tenth-value layer (TVL)” means the thickness of a specified material which attenuates x- radiation or gamma radiation to an extent such that the air kerma rate, exposure rate, or absorbed dose rate is reduced to one-tenth of the value measured without the material at the same point.
“Therapeutic radiation machine” means x-ray or electron-producing equipment designed and used for external beam radiation therapy.
“Virtual source” means a point from which radiation appears to originate. RH 20.3 General Administrative Requirements for Facilities Using Therapeutic Radiation Machines.
20.3.0 Administrative Controls. The registrant shall be responsible for directing the operation of the therapeutic radiation machines that have been registered with the Department. The registrant or the registrant's agent shall ensure that the requirements of this Part are met in the operation of the therapeutic radiation machines. For therapeutic radiation machines used only for veterinary applications, the registrant may request an exemption from those criteria of this Part that are not applicable to the practices of veterinary medicine.
20.3.1 Training for External Beam Radiation Therapy Authorized Users. The registrant for any therapeutic radiation machine subject to RH 20.7 or 20.8 shall require the authorized user to be a physician who:
20.3.1.1 Is certified in:
20.3.1.2 Is in the active practice of therapeutic radiology, and has completed 200 hours of instruction in basic radiation techniques applicable to the use of an external beam radiation therapy unit, 500 hours of supervised work experience, and a minimum of three
20.3.1.3 Reserved
20.3.1.4 Reserved
20.3.2 Training for Radiation Therapy Physicist. The registrant for any therapeutic radiation machine subject to RH 20.7 or 20.8 shall require the Radiation Therapy Physicist to:
20.3.2.1 Be registered with the Department, under the provisions of Part 2 of these Regulations, as a provider of radiation services in the area of calibration and compliance surveys of external beam radiation therapy units; and
20.3.2.2 Be certified by the American Board of Radiology in:
20.3.2.3 Be certified by the American Board of Medical Physics in Radiation Oncology Physics; or
20.3.2.4 Be certified by the Canadian College of Medical Physics; or
20.3.2.5 Hold a master's or doctor's degree in physics, biophysics, radiological physics, or health physics, and have completed one year of full time training in therapeutic radiological physics and also one year of full time work experience under the supervision of a Radiation Therapy Physicist at a medical institution. To meet this requirement, the individual shall have performed the tasks listed in RH 20.4.1, 20.7.16 or 20.8.19, and
20.3.2.6 Notwithstanding the provisions of RH 20.3.2.5, certification pursuant RH 20.3.2.2, 20.3.2.3, and 20.3.2.4 shall be required on or before December 31, 1999.
20.3.3 Qualifications of Operators.
20.3.3.1 Individuals who will be operating a therapeutic radiation machine for human use shall be:
20.3.3.2 The names and training of all personnel currently operating a therapeutic radiation machine shall be kept on file at the facility. Information on former operators shall be retained for a period of at least two (2) years beyond the last date they were authorized to operate a therapeutic radiation machine at that facility.
20.3.4 Written safety procedures and rules shall be developed by a Radiation Therapy Physicist and shall be available in the control area of a therapeutic radiation machine, including any restrictions required for the safe operation of the particular therapeutic radiation machine. The operator shall be able to demonstrate familiarity with these rules.
20.3.5 Operating procedures required by RH 20.7.18 and 20.8.18 shall specifically address how the Radiation Therapy Physicist is to be contacted for problems or emergencies, as well as the specific actions, if any, to be taken until the Radiation Therapy Physicist can be contacted.
20.3.6 Individuals shall not be exposed to the useful beam except for medical therapy purposes and unless such exposure has been ordered in writing by a licensed practitioner of the healing arts who meets the training requirements specified in RH 20.3.1. This provision specifically prohibits deliberate exposure of an individual for training, demonstration or other non-healing-arts purposes.
20.3.7 Reserved
20.3.7.1 Reserved
20.3.7.2 Reserved
20.3.7.3 Reserved
20.3.8 Reserved
20.3.9 Information and Maintenance Record and Associated Information. The registrant shall maintain records for the following tests completed on or after September 30, 1999, in a separate file or package for each therapeutic radiation machine, for inspection by the Department:
20.3.9.1 Report of acceptance testing;
20.3.9.2 Records of all surveys, calibrations, and periodic quality assurance checks of the therapeutic radiation machine required in this Part, as well as the name(s) of person(s) who performed such activities;
20.3.9.3 Records of maintenance and/or modifications performed on the therapeutic radiation machine after September 30, 1999, as well as the name(s) of person(s) who performed such services;
20.3.10 Records Retention. All records required by this Part shall be retained for a period of three (3) years from the date of completion.
RH 20.4 General Technical Requirements for Facilities Using Therapeutic Radiation Machines.
20.4.1 Protection Surveys.
20.4.1.1 The registrant shall ensure that radiation protection surveys of all new facilities, and existing facilities not previously surveyed are performed with an operable radiation measurement survey instrument calibrated in accordance with RH 20.9. The radiation protection survey shall be performed by, or under the direction of, a Radiation Therapy Physicist or a qualified expert and shall verify that, with the therapeutic radiation machine in a “BEAM-ON” condition and the machine parameters set to produce the maximum scattering and leakage conditions:
20.4.1.2 In addition to the requirements of RH 20.4.1.1, a radiation protection survey-shall also be performed prior to the first medical use:
20.4.1.3 The survey record shall indicate all instances where the facility, in the opinion of the Radiation Therapy Physicist or a qualified expert, is in violation of applicable Regulations. The survey record shall also include: the date of the measurements; the reason the survey is required; the manufacturer's name; model number and serial number of the therapeutic radiation machine; the instrument(s) used to measure radiation levels; a plan of the areas surrounding the treatment room that were surveyed; the measured dose rate at several points in each area expressed in microsieverts or millirems per hour; the calculated maximum level of radiation over a period of one year for each restricted and unrestricted area; and the signature of the individual responsible for conducting the survey;
20.4.1.4 If the results of the surveys required by RH 20.4.1.1 or 20.4.1.2 indicate any radiation levels in excess of the respective limit specified in RH 20.4.1.1, the registrant shall lock the control in the “OFF” position and not use the unit:
20.4.2 Modification of Radiation Therapy Unit or Room Before Beginning a Treatment Program. If the survey required by RH 20.4.1 indicates that an individual in an unrestricted area may be exposed to levels of radiation greater than those permitted by RH 4.14.1 of these Regulations, before beginning the treatment program the registrant shall:
20.4.2.1 Either equip the unit with beam direction interlocks or add additional radiation shielding to ensure compliance with RH 4.14.1 of these Regulations;
20.4.2.2 Perform the survey required by RH 20.4.1 again; and
20.4.2.3 Include in the records required by RH 20.4.4 the results of the initial survey, a description of the modification made to comply with RH 20.4.2.1, and the results of the second survey; or 20.4.2.4 Request and receive an authorization under RH 4.14.3 of these Regulations allowing radiation levels in unrestricted areas greater than those permitted by RH 4.14.1 of these Regulations.
20.4.3 Dosimetry Equipment.
20.4.3.1 The registrant shall have a calibrated dosimetry system available for use. The system shall have been calibrated by the National Institute for Standards and Technology (NIST) or by an American Association of Physicists in Medicine (AAPM) Accredited Dosimetry Calibration Laboratory (ADCL). The calibration shall have been performed within the previous 24 months and after any servicing that may have affected system calibration; or have been performed within the previous 36 months if the Radiation Therapy Physicist has performed an intercomparison with a dosimetry system that has been calibrated by NIST, AAPM, or ADCL, within the previous 24 months; and
20.4.3.2 The registrant shall have available for use a dosimetry system for quality assurance check measurements. To meet this requirement, the system may be compared with a system that has been calibrated in accordance with RH 20.4.3.1. This comparison shall have been performed within the previous twelve (12) months and after each servicing that may have affected system calibration. The quality assurance check system may be the same system used to meet the requirement in RH 20.4.3.1;
20.4.3.3 The registrant shall maintain a record of each dosimetry system calibration, intercomparison, and comparison for the duration of the license and/or registration. For each calibration, intercomparison, or comparison, the record shall include: the date; the model numbers and serial numbers of the instruments that were calibrated, inter- compared, or compared as required by RH 20.4.3.1 and 20.4.3.2; the correction factors that were determined; the names of the individuals who performed the calibration, intercomparison, or comparison; and evidence that the intercomparison was performed by, or under the direct supervision and in the physical presence of, a Radiation Therapy Physicist.
20.4.4 Records of External Beam Radiation Therapy Surveys and Measurements. The registrant for any therapeutic radiation machine subject to RH 20.7 or 20.8 shall maintain a copy of the records required in RH 20.4.1 and 20.4.2 for Department inspection. RH 20.5 Reserved RH 20.6 Radiation Therapy Physicist Support.
20.6.1 The services of a Radiation Therapy Physicist shall be required in facilities having therapeutic radiation machines. The Radiation Therapy Physicist shall be responsible for:
20.6.1.1 Full calibration(s) required by RH 20.7.16 and 20.8.19 and protection surveys required by RH 20.4.1;
RH 20.7 Therapeutic Radiation Machines of Less Than 500 kV.
20.7.1 Leakage Radiation. When the x-ray tube is operated at its maximum rated tube current for the maximum kV, the leakage air kerma rate shall not exceed the value specified at the distance specified for that classification of therapeutic radiation machine:
20.7.1.1 5-50 kV Systems. The leakage air kerma rate measured at any position 5 centimeters from the tube housing assembly shall not exceed 1 mGy (100 mrad) in any one hour.
20.7.1.2 > 50 to < 500 kV Systems. The leakage air kerma rate measured at a distance of 1 meter from the target in any direction shall not exceed 1 cGy (1 rad) in any one hour. This air kerma rate measurement may be averaged over areas no larger than 100 square centimeters. In addition, the air kerma rate at a distance of 5 centimeters from the surface of the tube housing assembly shall not exceed 30 cGy (30 rad) per hour.
20.7.1.3 For each therapeutic radiation machine, the registrant shall determine, or obtain from the manufacturer, the leakage radiation existing at the positions specified in RH 20.7.1.1 and 20.7.1.2 for the specified operating conditions. Records on leakage radiation measurements shall be maintained at the installation for inspection by the Department.
20.7.2 Permanent Beam Limiting Devices.
Permanent diaphragms or cones used for limiting the useful beam shall provide at least the same degree of attenuation as required for the tube housing assembly.
20.7.3 Adjustable or Removable Beam Limiting Devices.
20.7.3.1 All adjustable or removable beam limiting devices, diaphragms, cones or blocks shall not transmit more than five (5) percent of the useful beam for the most penetrating beam used;
20.7.3.2 When adjustable beam limiting devices are used, the position and shape of the radiation field shall be indicated by a light beam.
20.7.4 Filter System. The filter system shall be so designed that:
20.7.4.1 Filters can not be accidentally displaced at any possible tube orientation;
20.7.4.2 For equipment installed after September 30, 1999, an interlock system prevents irradiation if the proper filter is not in place;
20.7.4.3 The air kerma rate escaping from the filter slot shall not exceed 1 cGy (1 rad) per hour at one meter under any operating conditions; and 20.7.4.4 Each filter shall be marked as to its material of construction and its thickness.
20.7.5 Tube Immobilization.
20.7.5.1 The x-ray tube shall be so mounted that it can not accidentally turn or slide with respect to the housing aperture; and 20.7.5.2 The tube housing assembly shall be capable of being immobilized for stationary portal treatments.
20.7.6 Source Marking. The tube housing assembly shall be so marked that it is possible to determine the location of the source to within 5 millimeters, and such marking shall be readily accessible for use during calibration procedures.
20.7.7 Beam Block. Contact therapy tube housing assemblies shall have a removable shield of material, equivalent in attenuation to 0.5 millimeters of lead at 100 kV, which can be positioned over the entire useful beam exit port during periods when the beam is not in use.
20.7.8 Timer. A suitable irradiation control device shall be provided to terminate the irradiation after a pre-set time interval.
20.7.8.1 A timer with a display shall be provided at the treatment control panel. The timer shall have a pre-set time selector and an elapsed time or time remaining indicator;
20.7.8.2 The timer shall be a cumulative timer that activates with an indication of “BEAM-ON” and retains its reading after irradiation is interrupted or terminated. After irradiation is terminated and before irradiation can be reinitiated, it shall be necessary to reset the elapsed time indicator;
20.7.8.3 The timer shall terminate irradiation when a pre-selected time has elapsed, if any dose monitoring system present has not previously terminated irradiation;
20.7.8.4 The timer shall permit accurate pre-setting and determination of exposure times as short as one second;
20.7.8.5 The timer shall not permit an exposure if set at zero;
20.7.8.6 The timer shall not activate until the shutter is opened when irradiation is controlled by a shutter mechanism unless calibration includes a timer error correction to compensate for mechanical lag; and 20.7.8.7 Timer shall be accurate to within one percent of the selected value or one second, whichever is greater.
20.7.9 Control Panel Functions. The control panel, in addition to the displays required by other provisions in RH 20.7, shall have:
20.7.9.1 An indication of whether electrical power is available at the control panel and if activation of the x-ray tube is possible;
20.7.9.2 An indication of whether x-rays are being produced;
20.7.9.3 A means for indicating x-ray tube potential and current;
20.7.9.4 A means for terminating an exposure at any time;
20.7.9.5 Therapeutic radiation machines installed after November 30, 1994, shall have a locking device which will prevent unauthorized use of the therapeutic radiation machine; and 20.7.9.6 For therapeutic radiation machines manufactured after September 30. 1999, a positive display of specific filter(s) in the beam.
20.7.10 Multiple Tubes. When a control panel may energize more than one x-ray tube:
20.7.10.1 It shall be possible to activate only one x-ray tube at any time;
20.7.10.2 There shall be an indication at the control panel identifying which x-ray tube is activated; and 20.7.10.3 There shall be an indication at the tube housing assembly when that tube is energized.
20.7.11 Target-to-Skin Distance (TSD). There shall be a means of determining the central axis TSD to within one centimeter and of reproducing this measurement to within 2 millimeters thereafter.
20.7.12 Shutters. Unless it is possible to bring the x-ray output to the prescribed exposure parameters within five (5) seconds after the x-ray “ON” switch is energized, the beam shall be attenuated by a shutter having a lead equivalency not less than that of the tube housing assembly. In addition, after the unit is at operating parameters, the shutter shall be controlled by the operator from the control panel. An indication of shutter position shall appear at the control panel.
20.7.13 Low Filtration X-ray Tubes. Each therapeutic radiation machine equipped with a beryllium or other low-filtration window (HVL < 0.1 mm of Al) shall be clearly labeled as such upon the tube housing assembly and shall be provided with a permanent warning device on the control panel that is activated when no additional filtration is present.
20.7.14 Facility Design Requirements for Therapeutic Radiation Machines Capable of Operating in the Range 50 kV to 500 kV. In addition to shielding adequate to meet requirements of RH 20.10, the treatment room shall meet the following design requirements:
20.7.14.1 Aural Communication. Provision shall be made for continuous two-way aural communication between the patient and the operator at the control panel, except for:
20.7.14.2 Viewing Systems. Provision shall be made to permit continuous observation of the patient during irradiation and the viewing system shall be so located that the operator can observe the patient from the control panel. The therapeutic radiation machine shall not be used for patient irradiation unless at least one viewing system is operational.
20.7.15 Additional Requirements. Treatment rooms that contain a therapeutic radiation machine capable of operating above 150 kV shall meet the following additional requirements:
20.7.15.1 All protective barriers shall be fixed except for entrance doors or beam interceptors;
20.7.15.2 The control panel shall be located outside the treatment room or in a totally enclosed booth, which has a ceiling;
20.7.15.3 Interlocks shall be provided such that all entrance doors, including doors to any interior booths, shall be closed before treatment can be initiated or continued. If the radiation beam is interrupted by any door opening, it shall not be possible to restore the machine to operation without closing the door and reinitiating irradiation by manual action at the control panel; and 20.7.15.4 When any door referred to in RH 20.7.15.3 is opened while the x-ray tube is activated, the air kerma rate at a distance of one meter from the source shall be reduced to less than 1 mGy (100 mrad) per hour.
20.7.16 Full Calibration Measurements.
20.7.16.1 Full calibration of a therapeutic radiation machine subject to RH 20.7 shall be performed by, or under the direct supervision of, a Radiation Therapy Physicist:
20.7.16.2 To satisfy the requirement of RH 20.7.16.1, full calibration shall include all measurements recommended for annual calibration by NCRP Report 69, “Dosimetry of X-Ray and Gamma Ray Beams for Radiation Therapy in the Energy Range 10 keV to 50 MeV” (1981), unless the radiation therapy physicist determines that a particular recommendation of the NCRP Report 69 is not warranted for the clinical tasks for which the equipment will be used.
20.7.16.3 The registrant shall maintain a record of each calibration for the duration of the registration. The record shall include: the date of the calibration; the manufacturer's name, model number, and serial number for both the therapeutic radiation machine and the x-ray tube; the model numbers and serial numbers of the instruments used to calibrate the therapeutic radiation machine; and the signature of the Radiation Therapy Physicist responsible for performing the calibration.
20.7.17 Periodic Quality Assurance Checks.
20.7.17.1 Periodic quality assurance checks shall be performed on therapeutic radiation machines subject to RH 20.7, which are capable of operation at greater than or equal to 50 kV.
20.7.17.2 To satisfy the requirement of RH 20.7.17.1, quality assurance checks shall meet the following requirements:
20.7.17.3 The cause for a parameter exceeding a tolerance set by the Radiation Therapy Physicist shall be investigated and corrected before the system is used for patient irradiation;
20.7.17.4 Whenever a quality assurance check indicates a significant change in the operating characteristics of a system, as specified in the Radiation Therapy Physicist's quality assurance check procedures, the system shall be recalibrated as required in RH 20.7.16.1;
20.7.17.5 The registrant shall use the dosimetry system described in RH 20.4.3.2 to make the quality assurance check required in RH 20.7.17.2;
20.7.17.6 The registrant shall have the Radiation Therapy Physicist review and sign the results of each radiation output quality assurance check within one month of the date that the check was performed;
20.7.17.7 The registrant shall ensure that safety quality assurance checks of therapeutic radiation machines subject to RH 20.7 are performed at intervals not to exceed one month;
20.7.17.8 Notwithstanding the requirements of RH 20.7.17.6 and 20.7.17.7, the registrant shall ensure that no therapeutic radiation machine is used to administer radiation to humans unless the quality assurance checks required by RH 20.7.17.6 and 20.7.17.7 have been performed within the 30 day period immediately prior to said administration;
20.7.17.9 To satisfy the requirement of RH 20.7.17.7, safety quality assurance checks shall ensure proper operation of:
20.7.17.10 The registrant shall maintain a record of each quality assurance check required by RH 20.7.17.1 and 20.7.17.7 for three (3) years. The record shall include: the date of the quality assurance check; the manufacturer's name, model number, and serial number of the therapeutic radiation machine; the manufacturer's name; model number and serial number for the instrument(s) used to measure the radiation output of the therapeutic radiation machine; and the signature of the individual who performed the periodic quality assurance check.
20.7.18 Operating Procedures.
20.7.18.1 The therapeutic radiation machine shall not be used for irradiation of patients unless the requirements of RH 20.7.16 and 20.7.17 have been met;
20.7.18.2 Therapeutic radiation machines shall not be left unattended unless secured pursuant to RH 20.7.9.5;
20.7.18.3 When a patient must be held in position for radiation therapy, mechanical supporting or restraining devices shall be used;
20.7.18.4 The tube housing assembly shall not be held by an individual during operation unless the assembly is designed to require such holding and the peak tube potential of the system does not exceed 50 kV. In such cases, the holder shall wear protective gloves and apron of not less than 0.5 millimeters lead equivalency at 100 kV;
20.7.18.5 A copy of the current operating and emergency procedures shall be maintained at the therapeutic radiation machine control console; and 20.7.18.6 No individual other than the patient shall be in the treatment room during exposures from therapeutic radiation machines operating above 150 kV. At energies less than or equal to 150 kV, any individual, other than the patient, in the treatment room shall be protected by a barrier sufficient to meet the requirements of RH 4.6 of these Regulations.
20.7.19 Possession of Survey Instrument(s). Each facility location authorized to use a therapeutic radiation machine in accordance with RH 20.7 shall possess appropriately calibrated portable monitoring equipment. As a minimum, such equipment shall include a portable radiation measurement survey instrument capable of measuring dose rates over the range 10 µSv (1 mrem) per hour to 10 mSv (1000 mrem) per hour. The survey instrument(s) shall be operable and calibrated in accordance with RH 20.9.
RH 20.8 Therapeutic Radiation Machines - Photon Therapy Systems (500 kV and Above) and Electron Therapy Systems (500 keV and Above).
20.8.1 Possession of Survey Instrument(s). Each facility location authorized to use a therapeutic radiation machine in accordance with RH 20.8 shall possess appropriately calibrated portable monitoring equipment. As a minimum, such equipment shall include a portable radiation measurement survey instrument capable of measuring dose rates over the range 10 µSv (1 mrem) per hour to 10 mSv (1000 mrem) per hour. The survey instrument(s) shall be operable and calibrated in accordance with RH 20.9.
20.8.2 Leakage Radiation Outside the Maximum Useful Beam in Photon and Electron Modes.
20.8.2.1 The absorbed dose due to leakage radiation (excluding neutrons) at any point outside the maximum sized useful beam, but within a circular plane of radius 2 meters which is perpendicular to and centered on the central axis of the useful beam at the nominal treatment distance (i.e. patient plane), shall not exceed a maximum of 0.2 percent and an average of 0.1 percent of the absorbed dose on the central axis of the beam at the nominal treatment distance. Measurements shall be averaged over an area not exceeding 100 square centimeters at a minimum of 16 points uniformly distributed in the plane;
20.8.2.2 Except for the area defined in RH 20.8.2.1, the absorbed dose due to leakage radiation (excluding neutrons) at one meter from the electron path between the electron source and the target or electron window shall not exceed 0.5 percent of the absorbed dose on the central axis of the beam at the nominal treatment distance. Measurements shall be averaged over an area not exceeding 100 square centimeters;
20.8.2.3 For equipment manufactured after September 30, 1999, the neutron absorbed dose outside the useful beam shall be in compliance with International Electrotechnical Commission, Document 601-2-1, June 1998; and 20.8.2.4 For each therapeutic radiation machine, the registrant shall determine, or obtain from the manufacturer, the leakage radiation existing at the positions specified in RH 20.8.2.1 through RH 20.8.2.3 for the specified operating conditions. Records on leakage radiation measurements shall be maintained at the installation for inspection by the Department.
20.8.3 Leakage Radiation Through Beam Limiting Devices.
20.8.3.1 Photon Radiation. All adjustable or interchangeable beam limiting devices, excluding secondary custom blocks, shall attenuate the useful beam such that at the nominal treatment distance, the maximum absorbed dose anywhere in the area shielded by the beam limiting device(s) shall not exceed two (2) percent of the maximum absorbed dose on the central axis of the useful beam measured in a 10 centimeter by 10 centimeter radiation field;
20.8.3.2 Electron Radiation. All adjustable or interchangeable electron applicators shall attenuate the radiation, including but not limited to photon radiation generated by electrons incident on the beam limiting device and electron applicator and other parts of the radiation head, such that the absorbed dose in a plane perpendicular to the central axis of the useful beam at the nominal treatment distance shall not exceed:
20.8.3.3 Measurement of Leakage Radiation.
20.8.4 Filters/Wedges.
20.8.4.1 Each wedge filter that is removable from the system shall be clearly marked with an identification number. For removable wedge filters, the nominal wedge angle shall appear on the wedge or wedge tray (if permanently mounted to the tray). If the wedge or wedge tray is significantly damaged, the wedge transmission factor shall be redetermined;
20.8.5 Stray Radiation in the Useful Beam. For equipment manufactured after September 30, 1999, the registrant shall determine during acceptance testing, or obtain from the manufacturer, data sufficient to ensure that x-ray stray radiation in the useful electron beam, absorbed dose at the surface during x-ray irradiation and stray neutron radiation in the useful x-ray beam are in compliance with International Electrotechnical Commission, Document 601-2-1, June 1998.
20.8.6 Beam Monitors. All therapeutic radiation machines subject to RH 20.8 shall be provided with redundant beam monitoring systems. The sensors for these systems shall be fixed in the useful beam during treatment to indicate the dose monitor unit rate.
20.8.6.1 Equipment manufactured after September 30, 1999, shall be provided with at least two (2) independently powered integrating dose meters. Alternatively, common elements may be used if the production of radiation is terminated upon failure of any common element.
20.8.6.2 Equipment manufactured on or before September 30, 1999, shall be provided with at least one radiation detector. This detector shall be incorporated into a useful beam monitoring system;
20.8.6.3 The detector and the system into which that detector is incorporated shall meet the following requirements:
20.8.7 Beam Symmetry.
20.8.7.1 Bent-beam linear accelerators subject to RH 20.8 shall be provided with auxiliary device(s) to monitor beam symmetry;
20.8.7.2 The device(s) required in RH 20.8.7.1 shall be able to detect field asymmetry greater than ten (10) percent; and 20.8.7.3 The device(s) required in RH 20.8.7.1 shall be configured to terminate irradiation if the specifications in RH 20.8.7.2 can not be maintained.
20.8.8 Selection and Display of Dose Monitor Units.
20.8.8.1 Irradiation shall not be possible until a new selection of a number of dose monitor units has been made at the treatment control panel;
20.8.8.2 The pre-selected number of dose monitor units shall be displayed at the treatment control panel until reset manually for the next irradiation;
20.8.8.3 After termination of irradiation, it shall be necessary to reset the dosimeter display before subsequent treatment can be initiated; and 20.8.8.4 For equipment manufactured after September 30, 1999, after termination of irradiation, it shall be necessary for the operator to reset the pre-selected dose monitor units before irradiation can be initiated.
20.8.9 Air Kerma Rate/Absorbed Dose Rate. For equipment manufactured after September 30, 1999, a system shall be provided from whose readings the air kerma rate or absorbed dose rate at a reference point can be calculated. The radiation detectors specified in RH 20.8.6 may form part of this system. In addition:.
20.8.9.1 The dose monitor unit rate shall be displayed at the treatment control panel;
20.8.9.2 If the equipment can deliver under any conditions an air kerma rate or absorbed dose rate at the nominal treatment distance more than twice the maximum value specified by the manufacturer, a device shall be provided which terminates irradiation when the air kerma rate or absorbed dose rate exceeds a value twice the specified maximum. The dose rate at which the irradiation will be terminated shall be a record maintained by the registrant;
20.8.9.3 If the equipment can deliver under any fault condition(s) an air kerma rate or absorbed dose rate at the nominal treatment distance more than ten (10) times the maximum value specified by the manufacturer, a device shall be provided to prevent the air kerma rate or absorbed dose rate anywhere in the radiation field from exceeding twice the specified maximum value and to terminate irradiation if the excess absorbed dose at the nominal treatment distance exceeds 4 Gy (400 rad); and 20.8.9.4 For each therapeutic radiation machine, the registrant shall determine, or obtain from the manufacturer, the maximum value(s) specified in RH 20.8.9.2 and 20.8.9.3 for the specified operating conditions. Records of these maximum value(s) shall be maintained at the installation for inspection by the Department.
20.8.10 Termination of Irradiation by the Beam Monitoring System or Systems During Stationary Beam Radiation Therapy.
20.8.10.1 Each primary system shall terminate irradiation when the pre-selected number of dose monitor units has been detected by the system;
20.8.10.2 If the original design of the equipment included a secondary dose monitoring system, that system shall be capable of terminating irradiation when not more than fifteen (15) percent or 40 dose monitor units above the pre-selected number of dose monitor units set at the control panel has been detected by the secondary dose monitoring system; and 20.8.10.3 For equipment manufactured after September 30, 1999, an indicator on the control panel shall show which monitoring system has terminated irradiation.
20.8.11 Termination of Irradiation. It shall be possible to terminate irradiation and equipment movement or go from an interruption condition to termination condition at any time from the operator's position at the treatment control panel.
20.8.12 Interruption of Irradiation. If a therapeutic radiation machine has an interrupt mode, it shall be possible to interrupt irradiation and equipment movements at any time from the treatment control panel. Following an interruption it shall be possible to restart irradiation by operator action without any reselection of operating conditions. If any change is made of a pre-selected value during an interruption, irradiation and equipment movements shall be automatically terminated.
20.8.13 Timer. A suitable irradiation control device shall be provided to terminate the irradiation after a pre-set time interval.
20.8.13.1 A timer shall be provided which has a display at the treatment control panel. The timer shall have a pre-set time selector and an elapsed time indicator;
20.8.13.2 The timer shall be a cumulative timer that activates with an indication of “BEAM-ON” and retains its reading after irradiation is interrupted or terminated. After irradiation is terminated and before irradiation can be reinitiated, it shall be necessary to reset the elapsed time indicator;
20.8.13.3 The timer shall terminate irradiation when a pre-selected time has elapsed, if the dose monitoring systems have not previously terminated irradiation.
20.8.14 Selection of Radiation Type. Equipment capable of both x-ray therapy and electron therapy shall meet the following additional requirements:
20.8.14.1 Irradiation shall not be possible until a selection of radiation type (x-rays or electrons) has been made at the treatment control panel;
20.8.14.2 The radiation type selected shall be displayed at the treatment control panel before and during irradiation;
20.8.14.3 An interlock system shall be provided to ensure that the equipment can principally emit only the radiation type that has been selected;
20.8.14.4 An interlock system shall be provided to prevent irradiation with x-rays, except to obtain an image, when electron applicators are fitted;
20.8.14.5 An interlock system shall be provided to prevent irradiation with electrons when accessories specific for x-ray therapy are fitted; and 20.8.14.6 An interlock system shall be provided to prevent irradiation if any selected operations carried out in the treatment room do not agree with the selected operations carried out at the treatment control panel.
20.8.15 Selection of Energy. Equipment capable of generating radiation beams of different energies shall meet the following requirements:
20.8.15.1 Irradiation shall not be possible until a selection of energy has been made at the treatment control panel;
20.8.15.2 The nominal energy value selected shall be displayed at the treatment control panel until reset manually for the next irradiation. After termination of irradiation, it shall be necessary to reset the nominal energy value selected before subsequent treatment can be initiated;
20.8.15.3 Irradiation shall not be possible until the appropriate flattening filter or scattering foil for the selected energy is in its proper location; and 20.8.15.4 For equipment manufactured after September 30, 1999, the selection of energy shall be in compliance with International Electrotechnical Commission, Document 601-2-1, June 1998.
20.8.16 Selection of Stationary Beam Radiation Therapy or Moving Beam Radiation Therapy. Therapeutic radiation machines capable of both stationary beam radiation therapy and moving beam radiation therapy shall meet the following requirements:
20.8.16.1 Irradiation shall not be possible until a selection of stationary beam radiation therapy or moving beam radiation therapy has been made at the treatment control panel;
20.8.16.2 The mode of operation shall be displayed at the treatment control panel;
20.8.16.3 An interlock system shall be provided to ensure that the equipment can operate only in the mode that has been selected;
20.8.16.4 An interlock system shall be provided to prevent irradiation if any selected parameter in the treatment room does not agree with the selected parameter at the treatment control panel;
20.8.16.5 Moving beam radiation therapy shall be controlled to obtain the selected relationships between incremental dose monitor units and incremental movement. For equipment manufactured after September 30, 1999:
20.8.17 Facility Design Requirements for Therapeutic Radiation Machines Operating above 500 kV. In addition to shielding adequate to meet requirements of RH 20.10, the following design requirements are made:
20.8.17.1 Protective Barriers. All protective barriers shall be fixed, except for access doors to the treatment room or movable beam interceptors;
20.8.17.2 Control Panel. In addition to other requirements specified in this Part, the control panel shall also:
20.8.17.3 Viewing Systems. Windows, mirrors, closed-circuit television or an equivalent viewing system shall be provided to permit continuous observation of the patient following positioning and during irradiation and shall be so located that the operator may observe the patient from the treatment control panel. The therapeutic radiation machine shall not be used for patient irradiation unless at least one viewing system is operational;
20.8.17.4 Aural Communications. Provision shall be made for continuous two-way aural communication between the patient and the operator at the control panel. The therapeutic radiation machine shall not be used for irradiation of patients unless continuous two-way aural communication is possible;
20.8.17.5 Room Entrances. Treatment room entrances shall be provided with warning lights in a readily observable position near the outside of all access doors, which will indicate when the useful beam is “ON” and when it is “OFF” ;
20.8.17.6 Entrance Interlocks. Interlocks shall be provided such that all access controls are activated before treatment can be initiated or continued. If the radiation beam is interrupted by any access control, it shall not be possible to restore the machine to operation without resetting the access control and reinitiating irradiation by manual action at the control panel;
20.8.17.7 Beam Interceptor Interlocks. If the shielding material in any protective barrier requires the presence of a beam interceptor to ensure compliance with RH 4.14.1 of these Regulations, interlocks shall be provided to prevent the production of radiation, unless the beam interceptor is in place, whenever the useful beam is directed at the designated barriers;
20.8.17.8 Emergency Cutoff Switches. At least one emergency power cutoff switch shall be located in the radiation therapy room and shall terminate all equipment electrical power including radiation and mechanical motion. This switch is in addition to the termination switch required by RH 20.8.11. All emergency power cutoff switches shall include a manual reset so that the therapeutic radiation machine cannot be restarted from the unit's control console without resetting the emergency cutoff switch;
20.8.17.9 Safety Interlocks. All safety interlocks shall be designed so that any defect or component failure in the safety interlock system prevents or terminates operation of the therapeutic radiation machine; and 20.8.17.10 Surveys for Residual Radiation. Surveys for residual activity shall be conducted on all therapeutic radiation machines capable of generating photon and electron energies above ten (10) MV prior to machining, removing, or working on therapeutic radiation machine components which may have become activated due to photo-neutron production.
20.8.18 Operating Procedures.
20.8.18.1 No individual, other than the patient, shall be in the treatment room during treatment or during any irradiation for testing or calibration purposes;
20.8.18.2 Therapeutic radiation machines shall not be made available for medical use unless the requirements of RH 20.4.1, 20.8.19 and 20.8.20 have been met;
20.8.18.3 Therapeutic radiation machines, when not in operation, shall be secured to prevent unauthorized use;
20.8.18.4 When adjustable beam limiting devices are used, the position and shape of the radiation field shall be indicated by a light field.
20.8.18.5 If a patient must be held in position during treatment, mechanical supporting or restraining devices shall be used; and 20.8.18.6 A copy of the current operating and emergency procedures shall be maintained at the therapeutic radiation machine control console.
20.8.19 Acceptance Testing, Commissioning and Full Calibration Measurements.
20.8.19.1 Acceptance testing, commissioning and full calibration of a therapeutic radiation machine subject to RH 20.8 shall be performed by, or under the direct supervision of, a Radiation Therapy Physicist.
20.8.19.2 Acceptance testing and commissioning shall be performed in accordance with “AAPM Code of Practice for Radiotherapy Accelerators: Report of AAPM Radiation Therapy Task Group (TG) 45” , unless the radiation therapy physicist determines that a particular recommendation of the TG 45 Report is not warranted for the clinical tasks for which the equipment will be used; and shall be conducted before the first medical use following installation or reinstallation of the therapeutic radiation machine.
20.8.19.3 Full calibration shall include measurement of all parameters required by Table II of “Comprehensive QA for Radiation Oncology: Report of AAPM Radiation Therapy Committee Task Group (TG) 40” and shall be performed in accordance with “AAPM Code of Practice for Radiotherapy Accelerators: Report of AAPM Radiation Therapy Task Group 45” , unless the radiation therapy physicist determines that a particular recommendation of the TG 40 Report and/or TG 45 Report is not warranted for the clinical tasks for which the equipment will be used. Although it shall not be necessary to complete all elements of a full calibration at the same time, all parameters (for all energies) shall be completed at intervals not exceeding twelve (12) calendar months, unless a more frequent interval is required in Table II.
20.8.19.4 The Radiation Therapy Physicist shall perform all elements of a full calibration necessary to determine that all parameters are within acceptable limits:
20.8.19.5 The registrant shall maintain a record of each calibration in an auditable form for the duration of the registration. The record shall include: the date of the calibration; the manufacturer's name, model number and serial number for the therapeutic radiation machine; the model numbers and serial numbers of the instruments used to calibrate the therapeutic radiation machine; and the signature of the Radiation Therapy Physicist responsible for performing the calibration.
20.8.20 Periodic Quality Assurance Checks.
20.8.20.1 Periodic quality assurance checks shall be performed on all therapeutic radiation machines subject to RH 20.8 at intervals not to exceed those specified in “Comprehensive QA for Radiation Oncology: Report of AAPM Radiation Therapy Committee Task Group (TG) 40” , unless the radiation therapy physicist determines that a particular recommendation of the TG 40 Report is not warranted for the clinical tasks for which the equipment will be used;
20.8.20.2 To satisfy the requirement of RH 20.8.20.1, quality assurance checks shall include determination of central axis radiation output and periodic quality assurance checks contained in “Comprehensive QA for Radiation Oncology: Report of AAPM Radiation Therapy Committee Task Group (TG) 40” , unless the radiation therapy physicist determines that a particular recommendation of the TG 40 Report is not warranted for the clinical tasks for which the equipment will be used;
20.8.20.3 The registrant shall use a dosimetry system that has been inter-compared within the previous twelve (12) months with the dosimetry system described in RH 20.4.3.1 to make the periodic quality assurance checks required in RH 20.8.20.2;
20.8.20.4 The registrant shall perform periodic quality assurance checks required by RH
20.8.20.5 The registrant shall review the results of each periodic radiation output check according to the following procedures:
20.8.20.6 Safety quality assurance checks listed in “Comprehensive QA for Radiation Oncology: Report of AAPM Radiation Therapy Committee Task Group (TG) 40” shall be performed for therapeutic radiation machines subject to RH 20.8, unless the radiation therapy physicist determines that a particular recommendation of the TG 40 Report is not warranted for the clinical tasks for which the equipment will be used;
20.8.20.7 For therapeutic radiation machines not covered by TG 40, the following safety quality assurance checks, as applicable to the machines, shall be performed at intervals not to exceed one week:
20.8.20.8 The registrant shall promptly repair any system identified in RH 20.8.20.7 that is not operating properly; and 20.8.20.9 The registrant shall maintain a record of each quality assurance check required by RH 20.8.20.1 and 20.8.20.7 for three (3) years. The record shall include: the date of the quality assurance check; the manufacturer's name, model number, and serial number of the therapeutic radiation machine; the manufacturer's name, model number and serial number for the instrument(s) used to measure the radiation output of the therapeutic radiation machine; and the signature of the individual who performed the periodic quality assurance check.
RH 20.9 Calibration of Survey Instruments.
20.9.1 The registrant shall ensure that the survey instruments used to show compliance with this Part have been calibrated before first use, at intervals not to exceed twelve (12) months, and following repair.
20.9.2 To satisfy the requirements of RH 20.9.1, the registrant shall:
20.9.2.1 Calibrate all required scale readings up to 10 mSv (1000 mrem) per hour with an appropriate radiation source that is traceable to the National Institute of Standards and Technology (NIST);
20.9.2.2 Calibrate at least two (2) points on each scale to be calibrated. These points should be at approximately 1/3 and 2/3 of full-scale; and
20.9.3 To satisfy the requirements of RH 20.9.2, the registrant shall:
20.9.3.1 Consider a point as calibrated if the indicated dose rate differs from the calculated dose rate by not more than ten (10) percent; or 20.9.3.2 Consider a point as calibrated if the indicated dose rate differs from the calculated dose rate by not more than twenty (20) percent if a correction factor or graph is conspicuously attached to the instrument.
20.9.4 The registrant shall retain a record of each calibration required in RH 20.9.1 for three (3) years. The record shall include:
20.9.4.1 A description of the calibration procedure; and
20.9.4.2 A description of the source used and the certified dose rates from the source, and the rates indicated by the instrument being calibrated, the correction factors deduced from the calibration data, the signature of the individual who performed the calibration, and the date of calibration.
20.9.5 The registrant may obtain the services of individuals licensed by the Department, the US Nuclear Regulatory Commission, an Agreement State, or a Licensing State to perform calibrations of survey instruments. Records of calibrations that contain information required by RH 20.9.4 shall be maintained for three (3) years by the registrant.
20.10 Shielding and Safety Design Requirements.
20.10.1 Each therapeutic radiation machine subject to RH 20.7 or RH 20.8 shall be provided with such primary and/or secondary barriers as are necessary to ensure compliance with RH 4.6 and 4.14 of these Regulations.
20.10.2 Facility design information for all new installations of a therapeutic radiation machine or installations of a therapeutic radiation machine of higher energy into a room not previously approved for that energy shall be submitted to a Department approved radiation therapy Qualified Expert for approval prior to actual installation of the therapeutic radiation machine. The minimum facility design information that must be submitted is contained in Appendix A of this Part. PART 20 , APPENDIX A. INFORMATION ON RADIATION SHIELDING REQUIRED FOR PLAN REVIEWS I. All Therapeutic Radiation Machines.
A. Basic facility information including: name, telephone number and facility registration number of the individual responsible for preparation of the shielding plan; name and telephone number of the facility supervisor; and the street address [including room number] of the therapeutic radiation machine facility. The plan should also indicate whether this is a new structure or a modification to existing structure(s).
B. All wall, floor, and ceiling areas struck by the useful beam shall have primary barriers.
C. Secondary barriers shall be provided in all wall, floor, and ceiling areas not having primary barriers.
II. Therapeutic Radiation Machines up to 150 kV (photons only). In addition to the requirements listed in Section I above, therapeutic radiation machine facilities which produce only photons with a maximum energy less than or equal to 150 kV shall submit shielding plans which contain, as a minimum, the following additional information:
A. Equipment specifications, including the manufacturer and model number of the therapeutic radiation machine, as well as the maximum technique factors;
B. Maximum design workload for the facility including total weekly radiation output, expressed in gray (rad) or air kerma at one meter, total beam-on time or MU per day or week, the average treatment time or MU per patient, along with the anticipated number of patients to be treated per day or week;
C. A facility blueprint/drawing indicating: scale of 0.25 inch = 1 foot is typical; direction of North; normal location of the therapeutic radiation machine's radiation port(s); the port's travel and traverse limits; general direction(s) of the useful beam; locations of any windows and doors; and the location of the therapeutic radiation machine control panel. If the control panel is located inside the therapeutic radiation machine treatment room, the location of the operator's booth shall be noted on the plan and the operator's station at the control panel shall be behind a protective barrier sufficient to ensure compliance with RH 4.6 of these Regulations;
D. The structural composition and thickness or lead/concrete equivalent of all walls, doors, partitions, floor, and ceiling of the room(s) concerned;
E. The type of occupancy of all adjacent areas inclusive of space above and below the room(s) concerned. If there is an exterior wall, show distance to the closest area(s) where it is likely that individuals may be present; and F. At least one example calculation which shows the methodology used to determine the amount of shielding required for each physical condition (i.e.: primary and secondary/leakage barriers, restricted and unrestricted areas, entry doors) and shielding material in the facility:
1. If commercial software is used to generate shielding requirements, please also identify the software used and the version/ revision date.
2. If the software used to generate shielding requirements is not in the open literature, please also submit quality control sample calculations to verify the result obtained with the software.
III. Therapeutic Radiation Machines Over 150 kV.
In addition to the requirements listed in Section I above, therapeutic radiation machine facilities that produce photons with a maximum energy in excess of 150 kV and/or electrons shall submit shielding plans which contain, as a minimum, the following additional information:
A. Equipment specifications including the manufacturer and model number of the therapeutic radiation machine, and gray (rad) at the isocenter and the energy(s) and type(s) of radiation produced (i.e.: photon, electron). The target to isocenter distance shall be specified;
B. Maximum design workload for the facility including total weekly radiation output (expressed in gray (rad) at one meter), total beam-on time per day or week, the average treatment time per patient, along with the anticipated number of patients to be treated per day or week;
C. Facility blueprint/drawing [including both floor plan and elevation views] indicating relative orientation of the therapeutic radiation machine, scale of 0.25 inch = one foot is typical, type(s), thickness and minimum density of shielding material(s), direction of North, the locations and size of all penetrations through each shielding barrier (ceiling, walls and floor), as well as details of the door(s) and maze;
D. The structural composition and thickness or concrete equivalent of all walls, doors, partitions, floor, and ceiling of the room(s) concerned;
E. The type of occupancy of all adjacent areas inclusive of space above and below the room(s) concerned. If there is an exterior wall, show distance to the closest area(s) where it is likely that individuals may be present;
F. At least one example calculation which shows the methodology used to determine the amount of shielding required for each physical condition (i.e.: primary and secondary/leakage barriers, restricted and unrestricted areas, small angle scatter, entry door(s) and maze) and shielding material in the facility:
1. If commercial software is used to generate shielding requirements, identify the software used and the version/ revision date; and 2. If the software used to generate shielding requirements is not in the open literature, submit quality control sample calculations to verify the result obtained with the software.
IV. Neutron Shielding In addition to the requirements listed in Section III above, therapeutic radiation machine facilities that are capable of operating above 10 MV shall submit shielding plans which contain, as a minimum, the following additional information:
A. The structural composition, thickness, minimum density and location of all neutron shielding material;
B. Description of all assumptions that were used in neutron shielding calculations including, but not limited to, neutron spectra as a function of energy, neutron fluence rate, absorbed dose and dose equivalent (due to neutrons) in both restricted and unrestricted areas;
C. At least one example calculation which shows the methodology used to determine the amount of neutron shielding required for each physical condition (i.e.: restricted and unrestricted areas, entry door(s) and maze) and neutron shielding material utilized in the facility:
1. If commercial software is used to generate shielding requirements, also identify the software used and the version/ revision date; and 2. If the software used to generate shielding requirements is not in the open literature, also submit quality control sample calculations to verify the result obtained with the software.
D. The method(s) and instrumentation that will be used to verify the adequacy of all neutron shielding installed in the facility.
APPENDIX B Reserved APPENDIX C Reserved