What is the primary safety measure when handling a sealed radioactive source?

The primary safety measure when handling a sealed radioactive source is indeed using radiation protection equipment. This equipment is designed to shield individuals from the harmful effects of radiation emitted by the source. Properly utilized, radiation protection gear, such as lead aprons, gloves, and shields, significantly reduces the amount of radiation that reaches the body, thereby minimizing the risk of radiation exposure.

Although testing the source and utilizing ventilation systems can be important aspects of a comprehensive radiation safety program, they focus more on monitoring and controlling the environment rather than on direct protection during handling. Storing a sealed radioactive source at room temperature does not directly relate to safety measures in terms of protecting individuals from radiation exposure, as the safety measures must be actively employed when the source is being managed or used. Therefore, the emphasis on using radiation protection equipment highlights the necessity to actively safeguard against potential exposure during all handling processes.