山东省非铀矿山氡浓度测量及所致矿工剂量  

Measurement of radon concentration and dose assessment of miners for non-uranium mines in Shandong Province

作　　者：陈英民[1] 李海亮[1] 宋钢[1] 毕明卫[1] 万恩广 李明刚[3] 李明言[4] 

机构地区：[1]山东省医学科学院放射医学研究所,济南250062 [2]兖州矿业集团职业病防治所 [3]山东招远市疾病预防控制中心 [4]山东莱芜市疾病预防控制中心

出　　处：《中华放射医学与防护杂志》2009年第2期178-180,共3页Chinese Journal of Radiological Medicine and Protection

摘　　要：目的调查山东省典型非铀矿山井下^222Rn浓度并估算矿工接受年有效剂量。方法利用固体径迹探测器CR-39累积测量金矿、铁矿、煤矿井下^220Rn、^222Rn浓度，利用高纯锗γ谱仪分析矿石。^226Ra、^232Th、^40K活度浓度。结果山东非铀矿山井下。^220Rn浓度平均值由高到低依次为金矿、铁矿、煤矿、黏土矿，分别为1200、280、120和40Bq／m^3；煤矿、金矿、黏土矿和铁矿的^226Ra、^232Th、^40K活度浓度基本处于我国土壤天然放射性核素浓度范围内；^222Rn及其子体所致井下矿工年有效剂量，金矿最高为7．7mSv，铁矿次之，为1．7mSv，煤矿和黏土矿均低于1mSv。结论金矿和铁矿应采取加大通风能力等措施降低井下氡浓度，井下矿工应该作为职业照射人员进行管理。Objective To measure ^222Rn and ^220Rn concentrations in the underground non-uranium mines in Shandong Province, and to estimate the annual effective dose to the miners. Methods Concentrations of ^222Rn and ^220Rn in selected gold, iron, coal and clay mines were determined by passive time-integrating detectors with CR-39. Activity concentrations of ^226 Ra, ^232 Th and ^40 K were determined using gamma spectrometry equipped with HPGe detector. Results The average concentrations of ^220 Rn in the gold, iron, coal and clay mines were estimated to be 1200, 280, 120 and 40 Bq/m^3 , respectively. The activity concentrations of ^226Ra, ^232Th, ^40K in the ores for gold, iron, coal and clay mines ranged the same as the soil in China. The annual effective dose due to radon exposure in gold and iron mine was 7.70 mSv and 1.74 mSv, respectively. The annual doses received by miners in the coal and clay mines were lower than 1 mSv. Conclusions Underground miners in some gold and iron mines should be treated as workers occupationally exposed to ionizing radiation. The measurement such as increasing ventilation should be implemented to reduce underground radon concentration in these mines.

关 键 词：非铀矿山 氡 累积测量 年有效剂量 

分 类 号：R144[医药卫生—公共卫生与预防医学]