Effect of Successful ALARA Program on Precision and Accuracy of TLD/SRD Dose Reporting
R. A. Greenwood, J. M. Priest, J. L. Scott
Workgroups which normally enter the Radiologically Restricted Area every workday for extended periods of time but do not enter Radiation or High Radiation areas would show the greatest discrepancy. This has been shown to be true for workgroups such as Radiation Protection, Chemistry, and Operations. These groups have large discrepancies for those individuals with a total dose less than approximately 70 mrem by TLD. It is apparent that, even with zero calibration error, the relative discrepancy between SRD and TLD calculated doses will increase in magnitude with a decrease in actual cumulative dose, that is, the accuracy of the reported cumulative dose is inversely proportional to the cumulative dose, at least in the low dose range. This will hold true no matter what degree of precision is attained in the measurement process. Efforts to reduce the actual cumulative dose result in a decrease in the accuracy of the reported dose, at least in the low dose range.
This abstract was presented at the 33rd Annual Midyear Meeting, "Instrumentation, Measurements, and Electronic Dosimetry", Abstracts Session, 1/30/2000 - 2/2/2000, held in Virginia Beach, VA.