天津市某石化公司含密封源仪表工作场所放射防护情况调查分析  

Investigation of radiation protection status of gauges containing sealed radioactive source in a petrochemical company in Tianjin

作　　者：杨守龙 张继勉[1] 刘春旭[1] 刘彦 倪洋[1] 曾强[1] YANG Shou-long;ZHANG Ji-mian;LIU Chun-xu;LIU Yan;NI Yang;ZENG Qiang(Institute for Occupational Health,Tianjin Centers for Disease Control and Prevention,Tianjin 300011,China)

机构地区：[1]天津市疾病预防控制中心职业健康所,天津300011

出　　处：《环境与健康杂志》2025年第2期151-154,共4页Journal of Environment and Health

基　　金：天津市医学重点学科(专科)建设项目(TJYXZDXK-066B);天津市卫生健康科技项目青年人才项目(TJWJ2021QN027)。

摘　　要：目的了解天津市某石化公司含密封源仪表的放射防护现状,为放射源监督管理提供参考依据。方法采用国家标准规定的方法对某石化企业含密封源仪表周围辐射剂量水平进行现场测量,并对含密封源仪表周围的辐射水平进行评价。结果所检测的84台含密封源仪表离源容器外表面5 cm和100 cm周围剂量当量率的检测结果最大值分别为2022年的9.32μSv/h和2022年的2.48μSv/h,距探测器外表面5 cm和100 cm周围剂量当量率的检测结果最大值分别为2023年的2.44μSv/h和2022年的1.92μSv/h。2022—2024年含密封源仪表使用场所要求对人员的活动范围不限制的分别占67.86%、72.62%和66.67%。结论含密封源仪表在正常运行情况下,密封源仪表周围剂量当量率均满足国家标准要求,且随着时间的增加,泄漏辐射水平检测结果大体上呈现逐年递减的趋势。Objective To know the radiation protection status of gauges containing sealed radioactive source in a petrochemical company in Tianjin,and to provide scientific data for the radioactive source supervision and management.Methods The radiation dose level around gauges containing sealed radioactive source in a petrochemical enterprise was measured by the method prescribed by the national standard,and the radiation level around gauges containing sealed radioactive source was evaluated.Results The maximum values of the dose equivalent rate at 5 cm and 100 cm away from the outer surface of the source container of the 84 instruments containing sealed sources tested were 9.32μSv/h in 2022 and 2.48μSv/h in 2022 respectively.The maximum values of the dose equivalent rate at 5 cm and 100 cm away from the outer surface of the detector were 2.44μSv/h in 2023 and 1.92μSv/h in 2022 respectively.From 2022 to 2024,the requirements for unrestricted range of activities of personnel in places containing sealed source instruments accounted for 67.86%,72.62% and 66.67% respectively.Conclusion The instrument with gauges containing sealed radioactive source can not cause obvious damage to the health and safety of radiation workers under normal operation.

关 键 词：含密封源仪表 放射防护 检测 

分 类 号：R144[医药卫生—公共卫生与预防医学]