What is decontamination in a radioactive work environment and why is it important?

• A. The process of removing radioactive contamination from surfaces, equipment, or personnel; reduces dose, limits spread, and enables safe area release.
• B. The procedure for isolating contaminated areas to prevent access by workers.
• C. A method for measuring radiation using dosimeters.
• D. A way to store radioactive waste.

Answer: (A)

Decontamination means removing radioactive contamination from surfaces, equipment, and people. This is essential because it directly lowers the radiation dose a worker receives, helps prevent the contaminant from spreading to other areas or individuals, and allows a room or area to be released for normal use after cleanup. In practice, it involves cleaning or washing with appropriate agents, wiping down surfaces, decontaminating clothing and tools, and verifying cleanliness with contamination checks. By reducing residual activity, it supports ALARA and regulatory requirements, protecting workers and the surrounding environment. Other actions in a radiation program, like isolating contaminated areas, measuring radiation with dosimeters, or storing waste, are important but are not decontamination itself.