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计量学报  2022, Vol. 43 Issue (1): 114-119    DOI: 10.3969/j.issn.1000-1158.2022.01.18
  电离辐射、标准物质与生物计量 本期目录 | 过刊浏览 | 高级检索 |
气载氚监测仪校准用氚化甲烷体积活度测量方法及其不确定度分析
刘佳煜1, 郭涛2,3, 朱惠臣1, 钱楠2, 曾友石2, 赵超1
1.上海市计量测试技术研究院,上海 201203
2.中国科学院上海应用物理研究所,上海 201800
3.南华大学,湖南 衡阳 421001
Measurement Method of Volume Radioactivity of Tritiated Methane for Airborne Tritium Monitors Calibration and Its Uncertainty Analysis
LIU Jia-yu1, GUO Tao2,3, ZHU Hui-chen1, QIAN Nan2, ZENG You-shi2, ZHAO Chao1
1. Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China
2. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
3. University of South China, Hengyang,Hunan 421001, China
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摘要 针对气载氚监测仪校准用气体参考源氚化甲烷,提出其体积活度测量方法,用催化氧化燃烧炉将其转化为氚化水,用二级串联鼓泡器收集氚化水,并用液体闪烁计数器测定活度,从而确定气体参考源氚化甲烷体积活度,并进行了不确定度分析测定实验室已有氚化甲烷的体积活度为17.4MBq/m3,不确定度为6.4%k=2,符合GBT 30150-2013对气体参考源不确定度的要求。利用该气体对一款商用气载氚监测仪完成了校准实验,校准因子为0.88,表明利用所述方法确定气体参考源氚化甲烷体积活度及其不确定度,可为气载氚监测仪校准的量值溯源提供技术基础。
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刘佳煜
郭涛
朱惠臣
钱楠
曾友石
赵超
关键词 计量学气载氚监测仪氚化甲烷体积活度校准液体闪烁计数器不确定度分析    
Abstract:Aiming at the tritiated methane as the gas reference source for the calibration of airborne tritium monitor, a method for measuring its volume radioactivity is proposed. Tritiated methane is transformed into tritiated water by catalytic oxidation combustion furnace. Tritiated water is collected by two-stage series bubbler, and measured by liquid scintillation counter.Finally, the volume activity of tritiated methane is determined, and the uncertainty is analyzed.Implementing the above method, the volume radioactivity of the tritiated methane in lab and its expanded uncertainty are determined to be 17.4MBq/m3and 6.4% (k=2) separately, which meet the requirements for gaseous reference source according to GBT 30150-2013.The calibration experiment for a commercial airborne tritium monitor is conducted with the tritiated methane in lab, in which the calibration factor is 0.88. It indicates that the proposed method can provide a practical and credible technical basis for airborne tritium monitor calibration.
Key wordsmetrology    airborne tritium monitor    tritiated methane    volume radioactivity    calibration    liquid scintillation counter    uncertainty analysis
收稿日期: 2021-06-28      发布日期: 2022-01-06
PACS:  TB98  
基金资助:上海市青年科技启明星计划项目19QB1404900;上海市市场监督管理局科技计划项目2018-07;上海市科学技术委员会科研计划项目19DZ2292600
通讯作者: 赵超(1987-),男,湖南衡南人,上海市计量测试技术研究院高级工程师,主要从事电离辐射计量技术研究。 Email: zhaoc@simt.com.cn     E-mail: zhaoc@simt.com.cn
作者简介: 刘佳煜(1993-),女,湖南衡阳人,上海市计量测试技术研究院工程师,主要研究方向为电离辐射计量技术。Email: liujy@simt.com.cn
引用本文:   
刘佳煜, 郭涛, 朱惠臣, 钱楠, 曾友石, 赵超. 气载氚监测仪校准用氚化甲烷体积活度测量方法及其不确定度分析[J]. 计量学报, 2022, 43(1): 114-119.
LIU Jia-yu, GUO Tao, ZHU Hui-chen, QIAN Nan, ZENG You-shi, ZHAO Chao. Measurement Method of Volume Radioactivity of Tritiated Methane for Airborne Tritium Monitors Calibration and Its Uncertainty Analysis. Acta Metrologica Sinica, 2022, 43(1): 114-119.
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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2022.01.18     或     http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2022/V43/I1/114
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