The frequency for the performance of the surveys is specified in the licensee's procedures and is normally based on the potential hazard associated with fuel handling activities and the contamination levels of handled objects. It is also prudent for the licensee to consider the amount of traffic into and out of the controlled area. For example, if personnel enter the controlled area in the morning and do not leave until noon, it would be meaningless to perform surveys at the work exit area every 2 hours. However, if people are continuously entering and exiting the area to observe the work, it is necessary to check the work exit area for contamination when each one leaves. Radiation areas are to be monitored in accordance with Subpart F of 10 CFR Part 20, the TS and the licensee's procedural requirements.
Most facilities have continuous area radiation monitors with pre-set alarm set points.
While these may be helpful, they may be an unnecessary nuisance by being set so low that procedures would require evacuation during even a well controlled situation. However, if the set point is too high, the potential exists for the overexposure of workers without the benefit of a warning. Personnel dosimetry is required by 10 CFR 20.1502 and is to be used as specified by the licensee's procedures. Licensee personnel are normally instructed to check direct reading dosimeters frequently. 03.04 Security Plan .