福清核电站运行前环境γ辐射水平及所致居民剂量估算

目的 调查福清核电站运行前环境地表γ辐射剂量率及其所致居民暴露剂量。方法 按照《环境地表γ辐射剂量率测定规范》(GB/T 14583-1993)和《辐射环境监测技术规范》(HJ/T 61-2001)的要求,用GPS全球定位器确定监测点位置,选择17个监测点作为调查区,用Radalert 100 Nuclear放射性检测仪测量环境γ辐射空气吸收剂量率,估算居民暴露剂量。结果 核电站周围17个监测点的环境地表γ辐射空气吸收剂量率居室内变化范围为96~238nGy/h,平均值为191 nGy/h,居室外变化范围为73~177 nGy/h,平均值为144 nGy/h,由环境辐射外照射致福清市居民人均年有效剂量为1113.6 μSv,集体年有效剂量为1375.1 man·Sv。结论 福清核电站周围地表γ辐射空气吸收剂量率水平属于福建省正常环境放射性本底水平。

Gamma Radiation Levels in Terrestrial Environment and Resultant Population Dose Before Operation of Fuqing Nuclear Power Plant

Objective To investigate the gamma radiation levels in terrestrial environment and the resultant population dose before going into operation of Fuqing nuclear power plant and estimate the exposure dose of residents. Methods According to "Norm for the measurement of environmental terrestrial gamma-radiation dose rate (GB/T 14583-93)" and "Technical criteria for radiation environmental monitoring (HJ/T 61-2001)",Seventeen places were selected by GPS locator as the monitoring sites, the γ radiation level in terrestrial environment was measured by Radalert 100 Nuclear radiation detector,the exposure dose of residents was estimated. Results In the 17 monitoring places around nuclear power plant, The range of environmental gamma radiation air kerma rates in living room was 96~238 nGy/h,the average was 191 nGy/h. The range of environmental gamma radiation air kerma rates outdoor was 73~177 nGy/h and the average was 144 nGy/h. The per capita average annual effective dose equivalent made by natural γ radiation indoor and outdoor was 1113.6 μSv and the collective annual effective dose equivalent was 1375.1 man·Sv. Conclusion The radiation dose level around Fuqing nuclear power plant belongs to the normal natural background radiation level in Fujian province.