对多家实验室测量属性相同的盲样进行计量比对,考察测量结果的一致性和准确性,实现对各参比实验室的测量仪器、操作程序、参比人员和日常质控水平等测量准确性保障全要素的检验。2017~2018年,组织实施了中国广核集团水中多γ放射性核素的比活度测量比对,中国广核集团的6大核电基地,15家流出物或环境监测实验室参加了比对,共报送了23份比对数据。参加比对的实验室直接支持的核电运行机组占我国当前在运行机组总容量的半数以上,具有较强代表性。对报送的比对数据分别按照相对偏差比较法、En评价方法、Z比分数法进行了分析。根据参比实验室的实际质控需要与测量质量提升目标,结合En评价法与Z比分数法建立了合格性判定的综合评价准则。基于该准则,参比实验室测量57Co、137Cs和 241Am核素的比活度结果合格率为95.7%;测量109Cd和 60Co核素的比活度结果合格率为91.3%。
Abstract
In order to examine the accuracy and consistency of measurement results in measurement laboratories, measurement comparison had been organized to measure the same sample with the same properties between multiple laboratories. After the comparison, a full-factor check for levels of the measuring instruments, measuring personnel, operating procedures and daily quality control of each participating laboratory had been achieved. From 2017 to 2018, the comparison of radioactivty analysis of the gamma radionuclides in the water of China General Nuclear Power Group was organized and implemented. 15 laboratories from 6 major nuclear power bases participated in the comparison, and submitted 23 comparison results. The data were analyzed according to the relative deviation comparison method, En evaluation method and the Z-scores method. Finally, in order to compare the advantages and disadvantages of the comparison results, combined with the special situation in the field of nuclear power, the eligibility of the comparison results had been distinguished based on the En evaluation and Z-scores comprehensive evaluation method. Based on the evaluation criteria, the pass rate of the nuclide 57Co, 137Cs and 241Am is 95.7%; the pass rate of the nuclide 109Cd and 60Co is 91.3%.
关键词
计量学 /
水中&gamma /
核素 /
放射性活度 /
测量比对
Key words
metrology /
gamma radionuclide in water /
radioactivty /
comparison
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参考文献
［1］张淑蓉. 核电站低水平液体流出物的γ谱分析［J］. 中国辐射卫生, 1992, (1): 46-47.
Zhang S R. γ-spectrum analysis of low-level liquid effluent from nuclear power plants［J］. Chinese Journal of Radiological Health, 1992, (1):46-47.
［2］苏琼, 郭剑英, 邵宪章,等. 大亚湾核电厂应急计划区内的食品和水样品的γ谱法检测及其评价［M］. 北京:原子能出版社, 1999: 1-8.
［3］国家质量监督检验检验总局. JJF1117-2010 计量比对［S］. 2010.
［4］国家质量监督检验检疫总局. GB18871-2002 电离辐射防护与辐射源安全基本标准［S］. 2002.
［5］谭金波, 李彦禄, 徐春长. 高纯锗γ谱仪活度测量标准装置［J］. 计量学报, 2000, 21(3): 232-238.
Tan J B, Li Y L, Xu C C. HPGe gamma-ray spectrometer standard for activity measurement［J］. Acta Metrologica Sinica, 2000, 21(3):232-238.
［6］LNE-LNHB/CEA, Table de Radionucleides 2017［EB/OL］. http://www.nucleide.org/toc.htm.
［7］周强, 拓飞. 水样品放射性核素γ能谱分析的比对与评价［J］. 中华放射医学与防护杂志, 2017, 37(9): 700-704.
Zhou Q, Tuo F. Intercomparison and evaluation onγ-spectrometry of radionuclides in water［J］. Chinese Journal of Radiological Medicine and Protection, 2017, 37(9): 700-704.
［8］刁立军, 孟 军,陈细林,等. 环境水平样品放射性活度γ能谱法测量分析比对［R］. 北京: 中国原子能科学研究院年报, 2011: 141-142.
［9］郝润龙、谭金波、唐贞信. 环境放射性样品的锗γ谱测量比对［J］. 辐射防护, 1993, 13(4): 241-253.
Hao R L, Tan J B, Tang Z X. Intercomparison of samples radioactivity measurement of environmental by Ge gamma-ray spectrometer［J］. Radiation Protection, 1993, 13 (4): 241-253.
［10］拓飞. 2008年全国放射性核素γ能谱分析比对［J］. 中华放射医学与防护杂志, 2010, 30(3): 343-345.
Tuo F. Nationwide intercomparison of radionuclide by γ spectrometry analyses in 2008［J］. Chinese Journal of Radiological Medicine and Protection, 2010, 30(3):343-345.
［11］中国合格评定国家认可委员会.CNAS-GL002 能力验证结果的统计处理和能力评价指南［S］. 2018.
［12］中国国家标准化管理委员会.GB/T28043利用实验室间比对进行能力验证的统计方法［S］. 2011.
基金
国家重点研发计划重点专项(2017YFF0206304)
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