Estimation of Budget Uncertainty in a Personal Dosimetry Laboratory

The purpose of a personal dosimetry laboratory is to accurately report the equivalent dose for occupational exposure workers and the degree to which the reported value is a good estimate of the true one. The uncertainty budget refers to a comprehensive analysis of the factors contributing to the overall uncertainty in determining the measurement.The purpose of this study is to estimate the budget uncertainty associated with six quantities that influence the overall uncertainty associated with the measurement. To precisely calculate the equivalent dose for occupational exposure workers using the whole bodydosimeters, we use the absolute standard uncertainties, which include the reader calibration factor (RCF), element correction coefficient (ECC), zero dose reading, non-linearity, radiation energy, and direction of radiation incidence, and measured value. The coverage factor, k = 2, estimates the overall measurement uncertainty at 22%. All the input quantities have a significant influence on the uncertainty of measurement, with the variation in response in different qualities and angles having the largest contribution, followed by the variation to response in different amounts of radiation (non-linearity). Less but not insignificant influence is exerted by the other input quantities.