热释光法测量环境累积剂量不确定度分析

Uncertainty Analysis of Environmental Cumulative Dose Measured by Thermoluminescence Method

通过分析热释光法测量环境累积剂量测量过程中可能对测量结果有影响的因素,对各环节不确定度分量进行了评估。结果表明:热释光法测量环境累积剂量各不确定度分量中,主要考虑不确定分量为测量重复性引起的A类不确定度、刻度因子引起的B类不确定度以及TLD片在布放过程中所引起的A类不确定度;此外,TLD片筛选和宇宙射线响应引起的不确定度也较大。

By analyzing the factors that may affect the measurement results in the process of environmental cumulative dose measurement by thermoluminescence(TLD)method,the uncertainty components of each link were evaluated.It shows that among the uncertainty components involved,the main considerations are class A caused by measurement repeatability,class B caused by scale factor,and Class A caused by TLD lofting process.In addition,the uncertainty caused by TLD slice screening and cosmic ray response is also large.