NAC459.327. Determination of external dose from airborne radioactive material.

     1. Licensees shall, when determining the external dose from airborne radioactive material, include the deep-dose equivalent, lens dose equivalent and shallow-dose equivalent caused by external exposure to the cloud of airborne radioactive material.

     2. Measurements of airborne radioactive material and derived air concentration must not be used as the primary means to assess the deep-dose equivalent if the airborne radioactive material includes radionuclides other than noble gases or if the cloud of airborne radioactive material is not relatively uniform. The determination of the deep-dose equivalent must be based upon measurements using instruments or personnel monitoring equipment.

     (Added to NAC by Bd. of Health, eff. 1-18-94; A by Dep’t of Human Resources by R137-01, 5-30-2003)