How often must sealed sources undergo swipe tests for contamination?

Sealed sources must undergo swipe tests for contamination at least once every six months to ensure safety and compliance with regulatory standards. These tests help detect any leakage of radioactive materials from the sealed sources, which is crucial because even small amounts of contamination can pose health risks to workers and the environment. The six-month interval is a standard practice recommended by regulatory agencies to ensure a proper and frequent assessment of the integrity of the sealed sources. Regular monitoring helps in maintaining safety protocols and supports the early detection of any potential issues that might arise from the use of radioactive materials.