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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96~238n Gy/h,平均值为191 n Gy/h,居室外变化范围为73~177 n Gy/h,平均值为144 n Gy/h,由环境辐射外照射致福清市居民人均年有效剂量为1113.6μSv,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。
Objective To investigate the pre-operation environmental surface gamma radiation dose rate of Fuqing NPP and its resident exposure dose. Methods According to the requirements of “GB / T 14583-1993” and “Technical Specifications for Radiation Environment Monitoring” (HJ / T 61-2001), the GPS global positioning system was used to determine the location of monitoring points. 17 monitoring points as a survey area, using the Radalert 100 Nuclear radioactivity detector to measure the ambient dose of γ-radiation absorbed dose, and estimate the dose of inhalation exposure. Results The environmental surface gamma radiation dose rate of indoor environment changed from 96 to 238 n Gy / h with an average of 191 n Gy / h at 17 monitoring sites around the NPP, with an indoor variation range of 73-177 n Gy / h. Averaged 144 n Gy / h. The annual average effective dose of inhabitants per capita in Fuqing City was 1113.6μSv due to external environmental radiation exposure, and the annual effective dose was 1375.1 man · Sv. Conclusions The dose rate of gamma radiation absorbed by air around Fuqing NPP belongs to the normal environmental radioactive background of Fujian Province.