1. (a) The registrant shall ensure that the survey instruments used to show compliance with He-P 4047 have been calibrated as follows:

   1. (1) Before the first use;
   2. (2) At intervals not to exceed 12 months; and
   3. (3) Following repair.

2. (b) To satisfy the requirements of He-P 4047.08(a), the registrant shall:

   1. (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); and
   2. (2) Calibrate at least 2 points on each scale to be calibrated. These points shall be approximately 1/3 to 2/3 full-scale.

3. (c) To satisfy the requirements of He-P 4047.08(b), the registrant shall:

   1. (1) Consider a point as calibrated if the indicated dose rate differs from the calculated dose rate by not more than 10 percent; and
   2. (2) Consider a point as calibrated if the indicated dose rate differs from the calculated dose rate by not more than 20 percent if a correction factor or graph is conspicuously attached to the instrument.
4. (d) The registrant shall retain a record of each calibration required in He-P 4047.08(a) for 3 years.

5. (e) The record required in He-P 4047.08(d) shall include:

   1. (1) A description of the calibration procedure; and

   2. (2) A description of:

      1. a. The source used;
      2. b. The certified dose rates from the source;
      3. c. The rates indicated by the instrument being calibrated;
      4. d. The correction factors deduced from the calibration data;
      5. e. The signature of the individual who performed the calibration; and
      6. f. The date of calibration.
6. (f) The registrant may obtain the services of individuals registered or licensed by DHHS/RHS, the U.S. Nuclear Regulatory Commission, an Agreement State, or a Licensing State to perform calibrations of survey instruments.

Source. #6827, eff 8-6-98; ss by #8692, INTERIM, eff 7-27-06, EXPIRES: 2-2-07; ss by #8808, eff 1-24-07; ss by #10764, INTERIM, eff 1-23-15, EXPIRES: 7-22-15; ss by #10894, eff 7-21-15