Dose Limits

In the United States, the Nuclear Regulatory Commission (NRC) has the  authority to enforce dose standards.  Most states have entered into an  agreement with the NRC to enforce the dose limits set forth by the NRC.  In  non agreement states, the NRC has jurisdiction.

Occupational Dose Limits - Limits established for those working in radiation  areas

Annual dose limit to the whole body = 5 rem (50 mSv)

Annual dose limit for the eyes = 15 rem (150 mSv)

Annual dose limit for extremities = 50 rem (500 mSv)

Embryo-Fetus exposure in one month = 0.05 rem (0.5 mSv)

Embryo-Fetus exposure gestational limit = 0.5 rem (5 mSv)

Public Dose Limits - Limits established for the public areas which surround  radiation areas

Public dose limit (annual) = 0.1 rem (5 mSv)

Two important notes.

  1. The NRC does NOT recommend facilities employ individuals under the age of 18.  Workers under the age of 18 will have the same occupational dose limit as the public.
  2. Legally, a pregnant woman does NOT have to announce her pregnancy to an employer.  Once she does, however, the employer must legally limit her exposure prescribed by the NRC.  In order to provide proof that the limit has been met, she must wear 2 dosimetry badges.  One must be worn in the normal manner, usually at the collar level.  The other must be worn at waist level UNDERNEATH her protective apron.