辐射防护 ›› 2020, Vol. 40 ›› Issue (6): 556-560.

• 辐射探测技术与应用 • 上一篇    下一篇

大面积表面污染测量仪主要性能测试与分析

张菁1,2, 侯磊1,2, 饶贤明3, 刘晋瑾1,2, 杜向阳1,2, 张佳1,2, 乔敏娟1,2   

  1. 1.山西中辐核仪器有限责任公司,太原 030006;
    2.中国辐射防护研究院,太原 030006;
    3.中核霞浦核电有限公司,福建 宁德 355100
  • 出版日期:2020-11-20 发布日期:2021-01-27
  • 作者简介:张菁(1991—),女,2012年毕业于太原师范学院地理信息系统专业,2015年毕业于西安交通大学环境科学与工程专业,获硕士学位,助理研究员。E-mail:zhangjingzj0312@163.com

The performance analysis of large area portablesurface contamination survey meter

ZHANG Jing1,2, HOU Lei1,2, RAO Xianming3, LIU Jinjin1,2, DU Xiangyang1,2, ZHANG Jia1,2, QIAO Minjuan1,2   

  1. 1. Shanxi Zhongfu Nuclear Instrument Co. Ltd.,Taiyuan 030006;
    2. China Institute for RadiationProtection,Taiyuan 030006;
    3. China Nuclear Xiapu Nuclear Power Co. Ltd.,Fujian Ningde 355100
  • Online:2020-11-20 Published:2021-01-27

摘要: 针对用于测量α、β射线的便携式大面积表面污染测量仪,为确保其测量性能,本文根据JJG 478—2016和GB/T 5202—2008标准要求,对自主研发的便携式α、β大面积表面污染测量仪的均匀性、探测效率、探测限、响应时间和温度稳定性等主要性能指标进行了测试。结果表明:便携式大面积表面污染测量仪的表面发射率响应对241Am α源为30.4%左右,对90Sr-90Y β源为48.1%,对36Cl β源为45.5%左右;最低可探测下限对241Am α源为0.15 Bq/cm2,对β源90Sr-90Y为0.07 Bq/cm2,对β源36Cl为0.09 Bq/cm2;响应时间<4 s;在-10 ℃~40 ℃时可正常工作。各项参数指标满足标准要求,能够有效达到防止污染扩散,保证工作人员安全的目的。

关键词: 大面积表面污染测量仪, 表面发射率响应, 探测器的均匀性

Abstract: Aiming at a large area portable surface contamination survey meter used in measuring α,β radiation,and ensuring the performance of measurement of the meter,the main performance of self-made instrument was measured based on JJG 478—2016 and GB/T 5202—2008 standards,including the uniformity of detector,surface emission rate response,minimum detectable limit,response time and temperature stability.The results show that the surface emission rate response of alpha for 241Am is around 30.4%,of beta for 90Sr-90Y is around 48.1%,and of beta for 36Cl is around 45.5%.The minimum detectable limit of alpha for 241Am is 0.15 Bq/cm2,of beta for 90Sr-90Y is 0.07 Bq/cm2,and of beta for 36Cl is 0.09 Bq/cm2.The response time is less than 4 s.The instrument can operate normally in the temperature range of -10 ℃ to 40 ℃.These results are superior to the requirements of related standards and achieve the purpose of preventing the spread of radiation contamination to ensure the safety of field staff.

Key words: large area portable surface contamination survey meter, surface emission rate response, uniformity of detector

中图分类号: 

  • TL812