石家庄市办公场所室内氡浓度及所致剂量估算

Estimation of Radon Concentration in office and Doses Received by Residents in Shijiazhuang City

目的通过对石家庄市区不同楼层、不同建筑材料、不同建筑年代等办公场所室内氡浓度水平及其影响因素的调查分析,估算所致工作人员受照剂量。方法采用固体核径迹法测量累积剂量。结果石家庄市办公场所室内氡浓度平均值为(32.12±13.74)Bq·m-3,最高值为钢筋混凝土结构的平房。所致工作人员平均有效剂量为0.58m Sv/a。结论石家庄市办公场所室内氡所致工作人员受照剂量属正常天然本底辐射水平;建筑材料及通风设施是影响办公场所氡浓度的主要因素,选择恰当的建筑材料、有效通风可以降低工作人员受照剂量,减低其对人类健康的影响。

Objective To test the level of office radon concentration of residential areas in Shijiazhuang City in different floors,building materials and construction age and to analyze its influencing factors in order to estimates the exposure doses received by the residents. Methods solid state nuclear track method was used measure the cumulative dose of radon concentration. Results The mean concentration of office radon concentration was（ 32. 12 ± 13. 74） Bq·m^- 3in Shijiazhuang City. The highest values were in the reinforced concrete cottage. The dose caused by the radiation was 0. 58 mSv / a. Conclusion The level of office radon concentration of residential areas in Shijiazhuang City is a normal natural backgrood level. Building materials are the major factors that affect the office radon concentration. Selection of appropriate materials for construction and effective ventilation can reduce radiation doses received by residents,thus reducing its negative impacts on human health.