某铁矿辐射职业危害因素调查  

Investigation on occupational radiation hazards in the workers in an iron mine

作　　者：毕明卫[1] 朱建国[1] 卢峰[1] 张远[1] 刘长才[1] 李海亮[1] 

机构地区：[1]山东省医学科学院放射医学研究所,山东济南250062

出　　处：《中国职业医学》2011年第4期280-282,共3页China Occupational Medicine

基　　金：山东省科技攻关项目(2008GG10008002)

摘　　要：目的调查某铁矿氡浓度、矿石放射性核素活度,估算矿工年有效剂量。方法利用CR-39固体径迹探测器累积测量氡浓度;利用高纯锗γ谱仪分析矿石226Ra、232Th4、0K活度浓度。结果矿井下氡浓度平均值约为207 Bq/m3,估算所致矿工年有效剂量约为1.30 mSv;矿石中226Ra、232Th4、0K活度浓度分别为26.4、2.5和17.5 Bq/kg,估算所致矿工年有效剂量约为0.05 mSv/a。总计矿工年有效剂量为1.35 mSv/a。结论该铁矿应考虑采取加大通风能力等措施来降低井下氡浓度,并对井下矿工按照职业照射人员的要求开展职业健康监护。Objective To investigate the concentrations of radon and radionuclides in iron ore of an iron mine in Shandong Province,and to estimate the annual effective doses of the miners.Methods Radon concentrations were determined by solid-state nuclear track detector CR-39.The activity concentrations of 226Ra,232Th and 40K were determined by gamma spectrometry equipped with HPGe detector.Results The average radon concentration in the mine was 207 Bq/m3,the annual effective dose for the miners was about 1.30 mSv.The activity concentrations of 226Ra,232Th and 40K of the iron ores were 26.4,2.5 and 17.5 Bq/kg respectively.The annual effective dose of the miners was 0.05 mSv/a.So the total annual effective dose of the miners was 1.35 mSv/a.Conclusion Measures such as increasing ventilation should be implemented to reduce underground radon concentration in iron ore mines.The miners should be treated as the occupational radiation workers.

关 键 词：铁矿 氡活度浓度 累积测量 有效剂量 

分 类 号：X591[环境科学与工程—环境工程]