山东省矿井下工作人员职业性照射初步评价

目的 分析2015年-2017年山东省部分矿井中氡的活度浓度,对工作人员照射进行初步评价。方法 依据《空气中氡浓度的闪烁瓶测定方法》（GB/T 16147-1995）进行测量,依据《地下建筑氡及其子体控制标准》（GBZ 116-2002）和《电离辐射防护与辐射源安全基本标准》（GB 18871-2002）进行分析和评价。结果 2015年-2017年共检测煤矿氡样品1002件,算术平均值为21 Bq·m^-3,活度浓度最大值为377 Bq·m^-3;检测金矿氡样品36件,算术平均值为65 Bq·m^-3,活度浓度最大值为228 Bq·m^-3;检测铁矿氡样品7件,算术平均值为21 Bq·m^-3,活度浓度最大值为40 Bq·m^-3。结论 2015年-2017年所检测的山东省261家次煤矿、36家次金矿和7家次铁矿的井下氡的活度浓度水平均低于《地下建筑氡及其子体控制标准》（GBZ 116-2002）已用地下建筑的行动水平,均符合《电离辐射防护与辐射源安全基本标准》（GB 18871-2002）对工作人员剂量限值的要求。

A primary assessment of occupational exposure to underground miners in Shandong Province

Objective To analyze the levels of radon concentrations in some mines in Shandong Province from 2015 to 2017 and to preliminarily evaluate the dose levels of occupational exposure.Methods The activity concentrations of radon were determined according to the methods of Scintillation flask method for measuring radon concentration in the air (GB/T 16147-1995). The occupational exposure was evaluated according to Standard for controlling radon and its progenies in underground space(GBZ 116-2002) and Basic Standards for Protection Against Ionizing Radiation and for the Safety of Radiation Sources (GB18871-2002).Results Among the inspection samples collected from 2015 to 2017, the average concentrations of ²²²Rn in 1002, 36 and 7 samples from coal mines, gold mines and iron ores were 21 Bq·m^-3, 65 Bq·m^-3 and 21 Bq·m^-3, and the ranges were 14~377 Bq·m^-3, 20~228 Bq·m^-3 and 25~40 Bq·m^-3 respectively.Conclusions ²²²Rn concentrations in the samples are lower than the action level set for underground constructions in Standard for controlling radon and its progenies in underground space(GBZ 116-2002), and the results of annual radiation exposure to the underground miners also conform to the occupational limits of Basic Standards for Protection Against Ionizing Radiation and for the Safety of Radiation Sources (GB18871-2002).