What airborne radioactivity level classifies an Airborne Radioactivity Area?

An Airborne Radioactivity Area is defined based on the concentration of radioactive materials in the air, specifically measured in terms of "Derived Air Concentration" (DAC). The correct threshold for classifying such an area is set at 0.1 DAC. This means that an area will be designated as an Airborne Radioactivity Area if the concentration of airborne radioactive material exceeds this level.

This classification is critical for ensuring the safety and health of individuals who might be exposed to airborne radioactive particles. It helps in implementing appropriate monitoring and control measures to minimize exposure and protect workers in environments where radioactive materials are present. The 0.1 DAC limit serves as a benchmark for ongoing monitoring and helps establish protocols for entry and work practices in potentially contaminated environments.