When must a radiation survey instrument be checked for proper operation?

The requirement to check a radiation survey instrument for proper operation before the first use of the day is important for ensuring safety and accuracy. Instruments can be affected by environmental factors, wear and tear, and other variables that might compromise their efficacy. By performing a functionality check before the first use, personnel can confirm that the device operates correctly and provides reliable measurements. This proactive approach is crucial in any situation where radiation levels need to be monitored, as incorrect readings can lead to unsafe situations.

Regular checks at subsequent times during the workday, such as after each use or at the end of the day, while beneficial for maintaining confidence in the equipment, do not replace the necessity of an initial check before usage. Likewise, weekly maintenance checks, though essential for long-term reliability, do not address the immediate operational readiness needed at the start of each working day. Thus, ensuring proper function before the day’s work begins is the most critical step in maintaining safety protocols related to radiation exposure.