核电厂放射性固体废物桶外γ测量重要影响因素的探讨

辐射防护通讯 ›› 2020, Vol. 40 ›› Issue (3): 9-14.

核电厂放射性固体废物桶外γ测量重要影响因素的探讨

雷强^1,2, 刘哲³, 蒋婧¹, 何玮¹, 徐琛¹, 郑国文³

1.生态环境部核与辐射安全中心,北京, 102445;
2.福建福清核电有限公司,福建福清, 350300;
3.中国原子能科学研究院,北京, 102413

收稿日期:2020-05-16 出版日期:2020-06-20 发布日期:2021-01-15
通讯作者: 何玮。E-mail: hewei@chinansc.cn
作者简介:雷强(1986—),男, 2008年本科毕业于南华大学核工程与核技术专业,工程师。E-mail: leiqiang@chinansc.cn
基金资助:
大型先进压水堆及高温气冷堆核电站国家科技重大专项《先进压水堆便于退役的要求研究》(编号:2018ZX06002005)。

Discussion on out-of-barrel Gamma Measurement of NPP Solid Radioactive Wastes

LEI Qiang^1,2, JIANG Jing², HE Wei², XU Chen², LIU Zhe³, ZHEN GuoWen³

1. Nuclear and Radiation Safety Center, Ministry of Ecology and Environment, Beijing 102445, China;
2. Fujian Fuqing Nuclear Power Co., Ltd., Fuqing, Fujian 350300, China;
3. China Institute of Atomic Energy, Beijing 102413

Received:2020-05-16 Online:2020-06-20 Published:2021-01-15

摘要/Abstract

摘要： 本文针对我国运行核电厂常用的两种桶外γ活度测量系统(整体γ射线测量系统(IGS)和分段γ射线测量系统(SGS)),阐述了桶装放射性固体废物的活度和密度分布不均匀条件下对测量系统探测效率和不确定度的影响。现场试验及蒙特卡罗模拟计算表明,桶外γ活度测量系统基本满足电厂桶装废物γ核素活度测量要求,活度分布和密度分布导致的测量结果不确定度分别在17%和20%之内;同时应正确认识桶外γ测量方法在桶装固体废物测量中的地位及作用,针对存在的问题,提出应制定废物桶活度桶外测量方法的技术规范、保证设备的工作环境和加强人员培训。

关键词: 核电厂, 放射性固体废物, 桶外γ测量, 影响因素

Abstract: The effect of activity and density distribution of solid radioactive waste in barrels on the detection efficiency and uncertainty of two kinds of out-of-barrel activity measurement systems, integrated gamma-ray measurement System (IGS) and segmented gamma-ray measurement system (SGS), commonly used in nuclear power plants in China is described. Field tests and Monte Carlo simulations show that the out-of-barrel gamma measurement system basically meets the requirements for activity measurement of barrelled wastes in nuclear power plants, and the uncertainty of measurement results caused by the distribution of activity and density is within 17% and 20% respectively. At the same time, the position and function of this method should be correctly understood. In view of the existing problems, it is suggested that the relevant technical specifications should be prepared, the working environment of the equipment should ensured, and the personnel training should be strengthened.

Key words: Nuclear power plant, Solid radioactive waste, Out-of-barrel measurement, Factors

中图分类号:

TL941

雷强, 刘哲, 蒋婧, 何玮, 徐琛, 郑国文. 核电厂放射性固体废物桶外γ测量重要影响因素的探讨[J]. 辐射防护通讯, 2020, 40(3): 9-14.

LEI Qiang, JIANG Jing, HE Wei, XU Chen, LIU Zhe, ZHEN GuoWen. Discussion on out-of-barrel Gamma Measurement of NPP Solid Radioactive Wastes[J]. RADIATION PROTECTION BULLETIN, 2020, 40(3): 9-14.

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