R 325.5206 Determination of accumulated dose.

Rule 206. (1) This rule applies to licensees or registrants who propose, pursuant to Rule 203 (3) or (4), to permit individuals in a restricted area to receive radiation doses in excess of the limits specified in table 1 of Rule 205. (2) Before permitting an individual in a restricted area to be exposed to radiation in excess of the limits specified in table 1 of Rule 205, each licensee or registrant shall do all of the following: (a) Obtain a certificate on Form RH-101, or on a clear and legible record containing all the information required in that form, signed by the individual, showing each period of time after the individual attained the age of 18 in which the individual received an occupational dose of radiation. (b) Calculate on Form RH-101, in accordance with the instructions appearing therein, or on a clear and legible record containing all the information required in that form, the previously accumulated occupational dose received by the individual and the additional dose allowed for the individual under Rule 203 (3) or (4). (3) In the preparation of Form RH-101, or on a clear and legible record containing all the information required in that form, the licensee or registrant shall make a reasonable effort to obtain reports of the individual's previously accumulated occupational dose. For each period for which the licensee or registrant obtains these reports, he or she shall use the dose shown in the report in preparing the form. Where a licensee or registrant is unable to obtain reports of the individual's occupational dose for a previous complete calendar quarter, it is assumed that the individual has received the occupational dose specified in whichever of the following columns apply: Part of Body COLUMN 1 Assumed Dose in Rems for Calendar Quarters Before January 1, 1961 COLUMN 2 Assumed Dose in Rems For Calendar Quarters Beginning on or After January 1, 1961 Whole body, gonads, active blood-forming organs, head and trunk, lens of the eye 3.75 1.25 (4) The licensee or registrant shall retain and preserve records used in preparing Form RH-101. If calculation of the individual's accumulated occupational dose for all periods before January 1, 1961 yields a result higher than the applicable accumulated dose value for the individual as of that date, as specified in Rule 205, the excess may be disregarded.