昌江核电站周围环境食品放射性本底调查  

Baseline survey of radiation in food around Changjiang Nuclear Power Station

作　　者：陈玉珅[1] 王龙义[1] 邢坤[1] 陈云[1] 朱仔运 CHEN Yu-shen WANG Long-yi XING Kun CHEN Yun ZHU Zai-yun(Hainan Provincial Center for Disease Control and Prevention, Haikou, Hainan 570203, Chin)

机构地区：[1]海南省疾病预防控制中心,海南海口570203

出　　处：《中国热带医学》2016年第9期877-879,共3页China Tropical Medicine

基　　金：海南省自然科学基金项目(No.811161)

摘　　要：目的掌握昌江核电站周围环境食品放射性本底水平。方法以核电站反应堆为中心,半径10 km范围内,按当地主导风向下风向45°扇型区域内采集食品样,共8个采样点,根据当地居民饮食习惯采集4类11种食品。结果食品总α、总β均值分别为(0.643 3±0.885 1)、(24.201 3±15.779 7)Bq/kg;放射性核素主要有天然核素238U、232Th、226Ra、40K和人工核素137Cs、134Cs,平均活度分别为(0.501±0.351)、(0.561±0.884)、(0.302±0.215)、(95.870±67.814)、(0.032±0.031)、(0.042±0.059)Bq/kg;居民食入放射性核素所致年有效剂量为183.81μSv/年,其中137Cs、134Cs分别为0.18、0.03μSv/年。结论核电站环境食品总α、总β在我国食品天然放射性本底水平内,与其它地区相比处于相对低的水平;放射性核素活度水平均低于国家标准限值。Objective To master the baseline levels of radiation in food around Changjiang Nuclear Power Station.Methods The food samples were collected in the local predominant down wind direction 45° fan areas within a radius of 10 km around the nuclear power station reactor as the center. There were 8 sampling points and 4 categories of 11 kinds of foodaccording to local resident diet habits. Results The monitoring results of food radioactivity showed that the means of thegross α and gross β were（0.643 3±0.885 1）and（24.201 3±15.779 7）Bq/kg,respectively,and238 U,232Th,226 Ra,40K,137 Cs,134Cswere（0.501 ± 0.351）,（0.561 ± 0.884）,（0.302 ± 0.215）,（95.870 ± 67.814）,（0.032 ± 0.031）,and（0.042 ± 0.059）Bq/kgrespectively. The annual effective dose of residents caused by eating radionuclide was 183.81 μSv/y,and among which,thedoses caused by the artificial nuclide of137 Cs and134Cs were 0.18 and 0.03 μSv/y respectively. Conclusions The gross α andgross β radioactive levels around the Changjiang Nuclear Power Station environment are within the food natural radioactivebackground level in China,and compared with other regions,the gross α and gross β radioactive levels around the ChangjiangNuclear Power Station environment are relatively lower. The specific activities from radioactive species in food are lower thanthe national standard limits.

关 键 词：昌江核电站 食品放射性 放射性本底 

分 类 号：R14[医药卫生—公共卫生与预防医学]