辐射防护通讯 ›› 2025, Vol. 45 ›› Issue (5): 35-40.

• 经验交流 • 上一篇    下一篇

环境水平多源γ射线空气比释动能标准装置

陈双强1, 韦应靖1,2, 李胤1, 方登富1, 唐智辉1, 冯梅1   

  1. 1.中国辐射防护研究院, 辐射安全与防护山西省重点实验室, 中核集团辐射防护技术重点实验室,太原 030006;
    2.清华大学 核能与新能源技术研究院, 北京 100084
  • 收稿日期:2025-03-02 出版日期:2025-10-20 发布日期:2026-01-15
  • 通讯作者: 韦应靖。E-mail: weiyj531@sina. com
  • 作者简介:陈双强(1993—),男,2017 年毕业于兰州大学原子核物理专业,学士; 2020 年毕业于兰州大学核技术及应用专业,硕士; 助理研究员。 E-mail: cirpshq2020@126.com

Establishment of standard equipment for environmental level multi-source gamma ray air kerma

CHEN Shuangqiang1, WEI Yingjing1,2, LI Yin1, FANG Dengfu1, TANG Zhihui1, FENG Mei1   

  1. 1. China Institute for Radiation Protection, Key Laboratory of Radiation Safety and Protection in Shanxi Province, Key Laboratory of Radiation Protection Technology of China National Nuclear Corporation, Taiyuan 030006;
    2. Institute of Nuclear Energy and New Energy Technology, Tsinghua University, Beijing 100084
  • Received:2025-03-02 Online:2025-10-20 Published:2026-01-15

摘要: 依据国家标准《用于校准剂量仪和剂量率仪及确定其能量响应的X和γ参考辐射 第1部分:辐射特性及产生方法》中X和γ参考辐射的特性和产生方法,同时参考国家计量技术规范《固定式环境γ辐射空气比释动能(率)仪现场校准规范》,建立了环境水平多源γ射线空气比释动能标准装置。实验测得环境水平多源γ射线空气比释动能标准装置的空气比释动能率范围为 1.0×10-1 ~3×102 μGy/h,1 m处非均匀性小于5%的辐射野为ø300 mm,距离放射源1~5 m范围平方反比律5.0%内符合;使用标准电离室测得装置的稳定性为1.7%,重复性为0.5%;通过对测量结果不确定度分量的评定,装置的相对扩展不确定度为3.0% (k=2)。测量结果表明,环境水平多源γ射线空气比释动能标准装置的各项性能指标均满足环境水平剂量检测仪器的检定/校准要求。

关键词: γ射线, 环境监测, 比释动能, 标准装置

Abstract: In order to carry out the traceability and transmission of the value of radioactive environmental monitoring instruments, according to the characteristics and generation methods of X and γ reference radiation in GB/T 12162.1—2000 and the calibration specification of JJF 1733—2018, the environmental level multi-source γ-ray kerma standard device was established. The experimental results show that: the air kerma rate range of the standard equipment for multi-source γ-ray air kerma at environmental level is (1.0×10-1-3×102) μGy/h; the radiation field with non-uniformity of less than 5% at 1 m is ø 300 mm; and the inverse square law is consistent within 5.0% in the range of 1 m-5 m from radioactive source. The stability and reproducibility of the device measured by standard ionization chamber were 1.7% and 0.5%. The relative extended uncertainty of the device is 3.0% (k=2) by evaluating the uncertainty component of the measurement results. The measurement results show that the performance indicators of the environmental level multi-source γ-ray air kerma standard device meet the requirements of the calibration of the environmental level dose measurement instrument.

Key words: gamma rays, environmental monitoring, kerma, standard equipment

中图分类号: 

  • TL72