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8.1.1 Time

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For the purpose of control of occupational radiation dose, the reciprocity relationship


is valid. Thus, if work must be performed in a relatively high radiation field, restriction of exposure time, so that the product of the dose rate and exposure time does not exceed the maximum allowable total dose, allows the work to be done in compliance with the radiation safety criteria. If the job cannot be finished within the restricted time period, then the operation must be redesigned (by shielding the source, for example) in order to decrease the intensity of the radiation field, the worker must be better trained so that he can do the job more efficiently, or another worker must be substituted when the first worker reaches the dose limit.

Patty's Industrial Hygiene, Physical and Biological Agents

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