成都地铁氡浓度水平调查研究  

Investigation on radon concentration in Chengdu metro

作　　者：徐立鹏 陈立[2] 王先良[1] 黎杰[1] 彭毅[1] 刘敏 李春阳[2] 杨强[1,3] 谷懿[3] 李健颖 XU Lipeng;CHEN Li;WANG Xianliang;LI Jie;PENG Yi;LIU Min;LI Chunyang;YANG Qiang;GU Yi;LI Jianying(Radiation Oncology Key Laboratory of Sichuan Province,Sichuan Clinical Research Center for Cancer,Sichuan Cancer Hospital&Institute,Sichuan Cancer Center,Affiliated Cancer Hospital of University of Electronic Science and Technology of China,Chengdu 610041;Sichuan Radiation Environment Managing&Monitoring Center,Chengdu 611139;Key Laboratory of Application Nuclear Technology of Sichuan Province,Chengdu 610059)

机构地区：[1]放射肿瘤学四川省重点实验室,四川省肿瘤临床医学研究中心,四川省肿瘤医院·研究所,四川省癌症防治中心,电子科技大学附属肿瘤医院,成都610041 [2]四川省辐射环境管理监测中心站,成都611139 [3]地学核技术四川省重点实验室,成都理工大学,成都610059

出　　处：《辐射防护》2024年第4期367-373,共7页Radiation Protection

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)。

摘　　要：为掌握成都地铁环境空气中氡浓度水平,采用瞬时法和累积法对31个地铁站点开展氡浓度水平调查。结果表明:成都地铁279个测量点位的瞬时测量氡浓度范围为(9.1~39.0)Bq/m^(3),均值(19.7±7.8)Bq/m^(3);累积测量地铁站点124个测量点位的氡浓度范围为(9.7~32.5)Bq/m^(3),均值(18.4±4.3)Bq/m^(3),比较得出成都地铁氡浓度水平显著低于标准规定的参考水平。研究发现地铁车厢内的氡浓度均低于对应线路地铁站点,二者正相关性达0.84(P<0.05);上层安检处的氡浓度均低于对应站点低层站台,二者正相关性达0.81(P<0.05);非密闭场所售票厅的氡浓度均低于对应站点同层密闭场所控制室。分析得出,通风对降低地铁氡浓度水平有效果。估算得出地铁环境空气中氡及其子体对地铁工作人员及乘客所致年有效剂量分别为0.15 mSv和0.05 mSv。To understand the radon concentration levels in the Chengdu metro environment,instantaneous methods and cumulative methods were used to conduct an investigation to the radon concentration levels at 31 subway stations.The results showed that the radon concentration of 279 measuring points in Chengdu metro as measured instantaneously ranged from 9.1 to 39.0 Bq/m^(3),with an average of(19.7±7.8)Bq/m^(3).The radon concentration of 124 measuring points at the subway stations as measured cumulatively twice ranged from 9.7 to 32.5 Bq/m^(3),with an average of(18.4±4.3)Bq/m^(3).The radon concentration level was significantly lower than the standard reference value.It was found that the radon concentrations inside the subway cars were lower than that at the subway stations on the corresponding line,with a positive correlation reaching 0.84(P<0.05),and the radon concentrations at the upper security inspection points were lower than that at the lower platforms of the corresponding line,with a positive correlation reaching 0.81(P<0.05).The radon concentrations in the open ticket halls were lower than that in the control rooms in the enclosed area on the same floor of the corresponding line.Analysis revealed that ventilation is effective in reducing the level of radon concentration in the subway.The annual effective dose of radon and its progeny in the ambient air of the Chengdu metro to the subway staff and passengers is estimated to be 0.15 mSv and 0.05 mSv respectively.

关 键 词：成都地铁 氡浓度 累积测量 瞬时测量 有效剂量 

分 类 号：R144[医药卫生—公共卫生与预防医学] X837[环境科学与工程—环境工程]