High radiation control devices must be tested for proper operation?

The correct answer is that high radiation control devices must be tested for proper operation at the beginning of each period of use. This practice ensures that devices such as safety interlocks, alarms, and other operational controls are functioning correctly before engaging in any radiographic operations. By performing tests at the start of each period, operators can verify that the equipment is in optimal condition to safeguard against unintended radiation exposure, thereby enhancing safety for all personnel involved in radiographic inspections.

Regular testing at the beginning of each usage period is essential not only for compliance with safety regulations but also for maintaining a culture of safety in radiographic operations. This routine forms part of a systematic approach to radiation safety and helps in identifying any potential malfunctions that could lead to unsafe conditions during actual use, thereby preventing accidents and exposure incidents.

While other frequencies such as daily, weekly, or monthly testing could seem adequate based on various operational contexts, they do not align with the critical timing necessary for ensuring device reliability specifically prior to beginning new work cycles. The nature of radiation work demands thorough and immediate testing right before use to ensure that no lapses have occurred since the last operational period.