辐射防护 ›› 2020, Vol. 40 ›› Issue (3): 186-192.

• 辐射防护监测 • 上一篇    下一篇

固定式中子剂量仪器现场标校方法研究

吕宁1, 过惠平1, 尚爱国1, 周城1, 吕金旭1, 赵括1, 魏志浩2, 吕汶辉3, 刘洋4, 李大吉5, 王凯6   

  1. 1.火箭军工程大学,西安 710025;
    2.中国人民解放军96942部队,北京 102200;
    3.中国人民解放军92609 部队,北京 100077;
    4.西安冠能中子探测技术有限公司,西安 710123;
    5.中国人民解放军96605 部队,沈阳 110000;
    6.中国人民解放军96035 部队,吉林 通化 134000
  • 收稿日期:2019-10-14 发布日期:2020-07-10
  • 作者简介:吕宁(1981—),男,2004年毕业于第二炮兵工程学院工程物理(辐射防护)专业,副教授。E-mail: lvning1108@aliyun.com

Study on on-site calibration method of stationary neutron dosimeter

LV Ning1, GUO Huiping1, SHANG Aiguo1, ZHOU Cheng1, LV Jinxu1, ZHAO Kuo1, WEI Zhihao2, LV Wenhui3, LIU Yang4, LI Daji5, WANG Kai6   

  1. 1. Rocket Force Engineering University, Xi'an 710025;
    2. Troops 96942 of PLA, Beijing 102200;
    3. Troops 92609 of PLA, Beijing 100077;
    4. Xi'an Guanneng Neutron Detection Technology Co. Ltd. , Xi’an 710023;
    5. Troops 96605 of PLA, Shenyang 110000;
    6. Troops 96035 of PLA, Jilin Tonghua 134000
  • Received:2019-10-14 Published:2020-07-10

摘要: 本文利用小型可控中子源和中子剂量参考仪器组成的核设施现场标校系统,通过空间位置对称条件下的待校准仪器与参考仪器对中子管出射中子响应之比,得到校准系数;为了完成仪器的周围剂量当量校准系数从国家标准计量检定中心参考辐射场到核设施现场的传递,必须对其进行能量修正。通过Am-Be中子源模拟核设施内部辐射场,在其中进行中子剂量仪器现场标校实验,并与校准过的多球中子谱仪测量结果相比较。结果表明:使用未经修正的校准系数对待校准仪器的测量结果进行校准,周围剂量当量率相对偏差为17.0%;使用修正后的校准系数对待校准仪器的测量结果进行校准,周围剂量当量率相对偏差为-2.4%。

关键词: 中子剂量, 仪器标校, 能量修正, 辐射场测量, 现场标校

Abstract: In this paper, a nuclear facility on-site calibration system consisting of a small-scale controllable neutron source and a neutron dose reference instrument is used to obtain the calibration coefficient through the ratio of the response of the instrument to be calibrated and the reference instrument to the neutron emission of the neutron tube in a symmetrical position. In order to complete the transfer of the instrument’s ambient dose equivalent calibration coefficient from the reference radiation field of the National Standards Metrology and Calibration Center to the nuclear facility site, the calibration coefficient must be energy corrected. Am-Be neutron source was used to simulate the radiation field inside the nuclear facility, the on-site calibration experiments of neutron dose instruments were performed, and compared with the measurement results of the calibrated multi-sphere neutron spectrometer. The results have shown that: if the measurement results of the instrument to be calibrated were calibrated using an uncorrected calibration coefficient, the relative deviation of the ambient dose equivalent rate was 17.0%; while if the measurement results of the instrument to be calibrated were calibrated using the corrected calibration coefficient, the relative deviation of the ambient dose equivalent rate would be -2.4%.

Key words: neutron dose, instrument calibration, energy correction, radiation measurement, on-site calibration

中图分类号: 

  • TL75