The design of an uncontrolled area in radiology is based on the ncrp recommended limit of mgy/yr for the public.

1mGy/yr

Explanation:NCRP ( National council on the radiation protection and measurements) its mission is

to support radiation protection by providing independent scientific analysis, information, and recommendations that represent the consensus of leading scientists. It has been established that 1mGy/yr is the maximum acceptable exposure to an uncontrolled radiation,it is a United States organization recognized with a Charter passed by Congress.

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