核电厂流出物低水平放射性核素排放量统计方法实验研究  

Experimental verification on statistical method of nuclear power plant effluent emissions in low level radionuclide

作　　者：张艳霞[1] 李锦[1] 李宏宇[1] 韩善彪[1] 袁之伦[1] 

机构地区：[1]环境保护部核与辐射安全中心,北京100082

出　　处：《辐射防护》2015年第3期170-175,共6页Radiation Protection

基　　金：环保公益行业专项课题(201309054);国家重大科学仪器设备开发专项(2011YQ060094)

摘　　要：我国国家标准规定,运行核电厂在流出物放射性排放量统计中,对低于探测限的相关测量结果应通过实验分析进行合理估算,确实无法估算的,在排放量统计时按探测限的1/2取值。现有运行核电厂均采取了这种取值方法。针对合理估算低水平放射性核素含量问题,国家核与辐射安全监管部门组织运行核电厂以降低低水平放射性核素探测限方式开展了实验研究。实验结果显示,实验研究中探测限降低幅度达到常规监测探测限的1/20~1/2时,常规未检出的放射性核素仍未检出,常规监测检测出的少量低水平放射性核素检出率略有增加,检出值均略高于探测限。As stipulated in China 's national standard,measuring items lower than the detection limit in effluent radioactive emission statistics should be submitted to experimental analysis for reasonable estimation. To those truly unable to be estimated,use 1 /2 of the detection limit value for emission statistics. Existing running NPPs abide by the standard all. Regarding the low-level radionuclide estimation,the state 's nuclear and radiation relevant departments have organized NPPs for specific experimental studies to bring down detection limit. Experimental results show. When the detection limit is down to 1 /20—1 /2 of conventional limit, radionuclides not detected conventionally is still not detected; detection rate of a small amount of low level radionuclides detected in routine monitoring increases lightly. The detection values were slightly higher than the detection limit.

关 键 词：核电厂 流出物 低水平放射性核素 排放量统计 实验 

分 类 号：X837[环境科学与工程—环境工程]