Restricted Areas and Precautionary Procedures
Key Facts
U.S. NRC Regulations (10 CFR) Part 20: Standards for Protection Against Radiation, Subpart G
“CAUTION, RADIATION AREA”
Licensee shall post each airborne radioactivity area with conspicuous sign or signs bearing radiation symbol and “CAUTION, AIRBORNE RADIOACTIVITY AREA” or “DANGER, AIRBORNE RADIOACTIVITY AREA”
Licensee shall post each area or room in which there is used or stored amount of licensed material with conspicuous sign or signs bearing radiation symbol and “CAUTION, RADIOACTIVE MATERIAL(S)” or “DANGER, RADIOACTIVE MATERIAL(S)”
Unrestricted area has dose rate of < 2 mrem (0.02 mSv) in any 1 hour and < 100 mrem (1 mSv) in 1 year
Restricted areas have dose rates exceeding those of unrestricted area limits and require control of access and not accessible to public
Licensee shall use, to extent practical, process or other engineering controls (e.g., containment, decontamination, or ventilation) to control concentration of radioactive material in air
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Restricted Areas and Precautionary Procedures
