Why perform a radiation survey after activities in a controlled area?

• A. To verify area is clean, confirm removal of contamination, ensure zone release conditions are met, and document compliance.
• B. To determine how much money was spent on safety.
• C. To count devices deployed.
• D. To determine staffing levels for next shift.

Answer: (A)

After work in a controlled area, a radiation survey is needed to confirm the space is safe to return to normal use. This survey checks for any remaining contamination on surfaces, equipment, and in the air, and it verifies that decontamination efforts were effective. It also ensures that the area meets the release criteria set for the zone and provides documentation that compliance has been achieved for regulatory and internal records. Using appropriate instruments and wipe tests, the survey assesses levels of alpha, beta, and gamma contamination and guides the decision about whether further cleaning or additional checks are required. This protects workers and the environment from unnecessary exposure and creates a verifiable record for audits and inspections. The other options don’t address contamination control or release requirements, focusing instead on cost, counting devices, or staffing, which are not the purpose of a post-activity radiation survey.