海阳核电厂周边地区食品中放射性核素调查  

The Investigation of Activity Concentrations of Radionuclides in Foods in the Adjoining Areas of Haiyang Nuclear Power Plant

作　　者：许家昂[1] 李全太[1] 陈英民[1] 李海亮[1] 毕明卫[1] 

机构地区：[1]山东省医学科学院放射医学研究所,山东济南250062

出　　处：《中国辐射卫生》2011年第4期387-389,共3页Chinese Journal of Radiological Health

基　　金：卫生行业科研专项基金(200802018);山东省科技攻关项目(2011GSF12006)

摘　　要：目的获得海阳核电厂运行前周边地区食品中关键核素的放射性活度水平数据,为评价或解释该核电厂在正常运行期间、事故及事故后期间对周边食品影响提供本底数据。方法采集海阳核电厂周边的小麦、白菜、海鱼及牛奶等食品样品,样品预处理和制备均采用《辐射环境监测技术规范》HJ/T61-2001的方法,核素活度水平使用HPGe-γ谱仪测量系统测量。结果海阳核电厂周边的食品样品,小麦中226Ra、232Th、137Cs和40K活度浓度算术平均值分别为7.4×10-2、1.8×10-1、5.5×10-2和8.2×101 Bq/kg,范围分别为2.7×10-2～2.1×10-1、1.1×10-1～3.0×10-1、1.9×10-2～1.0×10-1和3.5×101～1.2×102Bq/kg;白菜中226 Ra、137 Cs和40 K活度浓度算术平均值分别为1.8×10-2、1.8×10-2和5.0×101 Bq/kg,范围分别为1.3×10-3～2.7×10-2、1.1×10-2～3.3×10-2和4.0×101～8.6×101Bq/kg;鱼样品中232Th、137Cs和40K活度浓度算术平均值分别为3.7×10-2、1.4×10-2和2.1×101 Bq/kg;牛奶中226Ra、137Cs和40K活度浓度为1.2×10-2、1.8×10-2和3.8×101 Bq/kg;其他核素放射性水平均低于相应的方法探测下限。结论海阳核电厂30km范围内部分食品中的人工和天然放射性核素活度浓度处在本底水平,食用后对居民造成的剂量负担较少。Objective The datas of the activity concentrations of the critical nuclides in foods of the adjoining areas of Haiyang Nuclear Power Plant were abtained before the operation,and the main goal of the investigation was to determine the background levels of the radionuclides distinguishing from those in the normal operation,nuclear accident and after the accident for evaluating or interpreting the radioactive impact to the foods.Methods The samples of the wheats,cabbages,fishes and milk of the adjoining areas of Haiyang Nuclear Power Plant were collected.The methods about preprocessing and preparation of the samples were based on Technical Criteria for Radiation Environmental Monitoring（HJ/T61-2001）.The activity concentrations of the critical nuclides in foods were tested using HPGe-γ Energy Spectrum Measurement Systerm.Results The results showed that the average levels of 226Ra,232Th,137Cs and 40K in wheats were 7.4×10-2 Bq·kg-1,1.8×10-1 Bq·kg-1,5.5×10-2 Bq·kg-1and 8.2×101 Bq·kg-1 respectively,their range were from 2.7×10-2 Bq·kg-1to 2.1×10-1 Bq·kg-1,from 1.1×10-1 Bq·kg-1 to 3.0×10-1 Bq·kg-1,from 1.9×10-2 Bq·kg-1to 1.0×10-1 Bq·kg-1and from 3.5×101 Bq·kg-1to 1.2×102 Bq·kg-1 respectively.The average levels of 226Ra,137Cs and 40K in cabbages were 1.8×10-2 Bq·kg-1,1.8×10-2 Bq·kg-1and 5.0×101Bq·kg-1 respectively,their range were from 1.3×10-3 Bq·kg-1 to 2.7×10-2 Bq·kg-1,from 1.1×10-2 Bq·kg-1 to 3.3×10-2 Bq·kg-1and from 4.0×101 Bq·kg-1 to 8.6×101 Bq·kg-1 respectively.The average levels of 226Ra,137Cs and 40K in fishes were 3.7×10-2 Bq·kg-1,1.4×10-2 Bq·kg-1and 2.1×101 Bq·kg-1 respectively.The average levels of 226Ra,137Cs and 40K in the milk was 1.2×10-2 Bq·kg-1,1.8×10-2 Bq·kg-1and 3.8×101 Bq·kg-1 respectively.The activity concentrations of the other radionuclides in foods were lower than the levels of the Minimum Detectable Activity Concentration respectively.Conclusions The activity concentrations of the artificial and natural radionuclides in foods of the adjoi

关 键 词：海阳核电厂 放射性核素 活度浓度 食品 

分 类 号：X591[环境科学与工程—环境工程]