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目的分析研究深圳市地铁线路γ辐射水平及所致地铁工作人员年有效剂量评估。方法采用UMo LB123多用途环境辐射剂量监测仪对地铁站点进行地表γ剂量率测定,计算所致工作人员的年有效剂量。结果深圳地铁站地表γ辐射水平范围0.08~0.35μSv/h,平均值0.168μSv/h,地铁工作人员年有效剂量0.966 m Sv/a。结论深圳地铁站γ辐射水平属正常本底水平,不会给地铁工作人员带来额外辐射风险。
Objective To analyze and evaluate the γ radiation level of subway lines in Shenzhen and the annual effective dose assessment of subway workers. Methods The UMo LB123 Multi-purpose Environmental Radiation Dosimeter was used to measure the γ dose rate of the ground surface of the subway station, and the annual effective dose of the staff was calculated. Results The surface gamma radiation level of Shenzhen Subway Station ranged from 0.08 to 0.35μSv / h with an average of 0.168μSv / h. The annual effective dose of subway workers was 0.966 mSv / a. Conclusion The γ radiation level of Shenzhen Metro Station is a normal background level and will not bring additional radiation risks to the subway staff.