To control safety and security of sources, which of the following is required?

The requirement to control safety and security of radioactive sources hinges on implementing safeguards that effectively monitor and account for these materials. A survey meter in the storage area serves a critical role in this context. It is a device used to measure radiation levels, which helps ensure that radiation exposure remains within safe limits. By having a survey meter readily available, personnel can consistently monitor for any radiation leakage or fluctuations in safety that may pose risks to both people and the environment.

This tool also aids in the detection of any unauthorized access to the sources, as any significant changes in radiation levels can prompt immediate investigation. The presence of a survey meter contributes to a proactive safety culture, where ongoing monitoring helps to quickly identify potential issues before they escalate into serious hazards.

In contrast, while source movement logs and secure storage facilities are essential components of source management and tracking, they do not directly facilitate immediate safety assessments like a survey meter does. Hence, having a survey meter available directly addresses the critical needs of safety and emergency responsiveness in the handling of radioactive sources.