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目的对武汉市轨道交通2号线一期工程各站段的氡浓度水平进行监测和评价,初步掌握该轨道交通重点区域的氡浓度水平。方法对室内氡浓度水平进行监测、评价,并估算氡所导致的地铁内工作人员年有效剂量。结果轨道交通工作人员由于氡所致人体年有效剂量为0.14 mSv。结论武汉市轨道交通2号线一期工程人员由于氡的照射受到的人均年有效剂量小于GB 18871-2002给出的剂量限值,低于公众年有效剂量安全范围。
Objective To monitor and evaluate the radon concentration in each station of the first phase of Wuhan Metro Line 2, and to grasp the level of radon concentration in the key areas of the rail transit. Methods Indoor radon concentration levels were monitored and evaluated, and annual effective doses of radon to workers in the subway were estimated. Results The annual effective dose of human body due to radon was 0.14 mSv for rail transit workers. Conclusions The per capita effective dose received by workers in the first phase of Wuhan Metro Line 2 project due to radon irradiation is less than the dose limit given in GB 18871-2002 and is lower than the public safety dose range of effective dose.