Except for planned special exposures according to part 4731.2060, a licensee must control the occupational dose to individual adults to the following dose limits:
Doses received in excess of the annual limits, including doses received during accidents, emergencies, and planned special exposures, must be subtracted from the limits for planned special exposures that the individual may receive during the current year as specified under part 4731.2060, item E, subitem (1), and during the individual's lifetime as specified under part 4731.2060, item E, subitem (2).
When the external exposure is determined by measurement with an external personal monitoring device, the deep-dose equivalent must be used in place of the effective dose equivalent, unless the effective dose equivalent is determined by a dosimetry method approved by the commissioner. The assigned deep dose equivalent must be for the part of the body receiving the highest exposure. The assigned shallow dose equivalent must be the dose averaged over the contiguous ten square centimeters of skin receiving the highest exposure. The deep dose equivalent, lens dose equivalent, and shallow dose equivalent may be assessed from surveys or other radiation measurements to demonstrate compliance with the occupational dose limits if the individual monitoring device was not in the region of highest potential exposure or if the results of individual monitoring are unavailable.
Derived air concentration (DAC) and annual limit on intake (ALI) values in part 4731.2750 may be used by the licensee to determine an individual's dose according to part 4731.2540 and to demonstrate compliance with the occupational dose limits.
29 SR 755; 33 SR 1440
March 12, 2009
Official Publication of the State of Minnesota
Revisor of Statutes