摘要
为掌握成都市地铁环境空气中氡浓度水平和γ辐射污染状况。采用固体径迹蚀刻法和瞬时测量法分别对成都地铁站内氡浓度水平和γ辐射水平开展调查研究,并对测量数据比较分析。成都地铁氡浓度测量结果范围为(9.7~32.5)Bq/m^(3),均值为(18.3±4.3)Bq/m^(3),相较国内其它城市地铁站内氡浓度偏低;成都地铁站内γ剂量率范围为(74.9~82.6)nSv/h,均值为(78.8±1.0)nSv/h,低于成都地区室内环境γ剂量率均值。估算出地铁工作人员因地铁环境氡吸入与γ辐射照射所致年有效剂量约0.30 mSv,远低于标准限值。调查研究表明成都地铁环境中的氡浓度和γ辐射水平不会对地铁工作人员造成额外的辐射危害。
Purpose:Understand the radon concentration and gamma radiation in the air of Chengdu Metro.Methods:The solid track etching method and the instantaneous measurement method were used to investigate the radon concentration and gamma radiation dose in Chengdu Metro stations,and the measured data were compared and analyzed.Results:The results showed that the measured range of radon concentration in Chengdu Metro was(9.7~32.5)Bq/m^(3),and the average radon concentration was(18.4±4.3)Bq/m^(3)which was lower than that in other cities in China.The range of gamma dose rates in Chengdu Metro stations was(74.9~82.6)nSv/h,and the mean value was(78.8±1.0)nSv/h which was lower than the mean value of indoor gamma dose rate in Chengdu area.It was estimated that the effective dose of metro staff caused by radon inhalation and gamma radiation exposure in the metro environment was about 0.30 mSv/a,which was far lower than the standard limit.Conclusion:The investigation showed that radon concentration and gamma radiation in Chengdu Metro did not pose additional radiation hazards to the metro staff.
作者
徐立鹏
王先良
刘敏
邓疆鹏
钱骏
唐辉
XU Li-peng;WANG Xian-liang;LIU Min;DENG Jiang-peng;QIAN Jun;TANG Hui(Department of Radiotherapy,Key Laboratory of Radiation Oncology in Sichuan,Sichuan Clinical Research Center for Cancer,Sichuan Cancer Hospital&Institute,Sichuan Cancer Center,Affiliated Cancer Hospital of University of Electronic Science&Technology of China,Chengdu 610041,China;Sichuan Radiation Environment Managing&Monitoring Center,Chengdu 611139,China)
出处
《四川环境》
2024年第3期79-83,共5页
Sichuan Environment
基金
国家自然科学基金国家重大科研仪器研制项目(42127807)
四川省自然科学基金项目(2023NSFSC0711)
四川省自然科学基金项目(23NSFSCC0116)
四川省肿瘤医院优秀青年基金项目(YB2021030)。
关键词
成都地铁
氡浓度
γ辐射剂量
有效剂量
Chengdu Metro
radon concentration
gamma radiation dose
effective dose
