1. (1) For determining the doses specified in this rule, a dose from X or gamma rays up to 10 MeV may be assumed to be equivalent to the exposure measured by a properly calibrated appropriate instrument in air at or near the body surface in the region of the highest dose rate.

2. (2) Except as provided in (3) of this rule, no licensee or registrant shall possess, use, receive, or transfer sources of radiation in such a manner as to cause any individual in a restricted area to receive in any period of 1 calendar quarter from all sources of radiation in the licensee's or registrant's possession a dose in excess of the limits specified in the following table:

   Rems per calendar quarter

   Whole body; head and trunk;

   active blood-forming organs;

   lens of eyes; or gonads . . . . . . . . . . ........................................................1 1/4

   Hands and forearms; feet

   and ankles . . . . . . . . . . . . . . . . ...............................................................18 3/4

   Skin of whole body . . . . . . . . . . . . . ..........................................................7 1/2

3. (3) A licensee or registrant may permit an individual in a restricted area to receive a dose to the whole body greater than that permitted under (2) of this rule, provided:

   1. (a) during any calendar quarter the dose to the whole body from sources of radiation in the licensee's or registrant's possession shall not exceed 3 rems;
   2. (b) the dose to the whole body, when added to the accumulated occupational dose to the whole body, shall not exceed 5(N-18) rems where "N" equals the individual's age in years at his last birthday; and
   3. (c) the licensee or registrant has determined the individual's accumulated occupational dose to the whole body on department form MRH-30 or on a clear and legible record containing all the information required in that form and has otherwise complied with the requirements of ARM 37.14.706 . As used in (3) , "dose to the whole body" shall be deemed to include any dose to the whole body, gonads, active blood-forming organs, head and trunk, or lens of eye.

Authorizing statute(s): Sec. 75-3-201, MCA

Implementing statute(s): Sec. 75-3-201, MCA

History: NEW, 1980 MAR p. 1069, Eff. 3/28/80; TRANS, from DHES, 1996 MAR p. 433; TRANS, from DEQ, 2000 MAR p. 189.