辐射研究与辐射工艺学报2025，Vol.43Issue(3)：108-116,9.DOI:10.11889/j.1000-3436.2024-0079
某核电厂地下水总β放射性测量不确定度评定
Uncertainty evaluation of the measurement of gross beta activity in the groundwater of a nuclear power plant
摘要
Abstract
In this study,a comprehensive assessment of the uncertainty in the measurement of gross beta activity in the groundwater of a nuclear power plant was performed.Through a detailed analysis of the main steps in the determination process,the sources of uncertainty affecting the measurement results were identified and quantified,and the combined and expanded uncertainties were calculated.The results showed that the main factors affecting the determination of gross beta activity concentration in groundwater by the thick source method include sampling,sample recovery rate,correction factor of α-ray cross-talk in the β channel,specific activity of the reference material,and sample counting rate,collectively accounting for approximately 80.6%.The contributions of the specific activity of the reference material,the sample counting rate,and the spreading uniformity of the sample were approximately 35.4%.The effects of the sample size,residue quality,and data rounding were relatively small.The uncertainty introduced by sampling,which accounted for 13.5%,should not be underestimated.关键词
核电厂/总β放射性/不确定度评定/抽样/GUM法Key words
Nuclear power plant/Gross beta activity/Uncertainty evaluation/Sampling/GUM method分类
医药卫生引用本文复制引用
郑俊涛,吴迪,徐晋,徐国鹏,郑志豪,成丰..某核电厂地下水总β放射性测量不确定度评定[J].辐射研究与辐射工艺学报,2025,43(3):108-116,9.基金项目
中国广核集团企业内部自研项目(2023-2024年)资助 Supported by China General Nuclear Power Group Enterprise Internal Self Research Project(2023-2024) （2023-2024年）
