大面积表面污染测量仪主要性能测试与分析

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

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.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 Jing^1,2, HOU Lei^1,2, RAO Xianming³, LIU Jinjin^1,2, DU Xiangyang^1,2, ZHANG Jia^1,2, QIAO Minjuan^1,2

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/Abstract

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

张菁, 侯磊, 饶贤明, 刘晋瑾, 杜向阳, 张佳, 乔敏娟. 大面积表面污染测量仪主要性能测试与分析[J]. 辐射防护, 2020, 40(6): 556-560.

ZHANG Jing, HOU Lei, RAO Xianming, LIU Jinjin, DU Xiangyang, ZHANG Jia, QIAO Minjuan. The performance analysis of large area portablesurface contamination survey meter[J]. RADIATION PROTECTION, 2020, 40(6): 556-560.