秦山核电基地外围环境放射性水平20年监测结果  

Monitoring Result of Radioactivity Level in External Environment Around Qinshan NPP Base During Past Twenty Years

作　　者：刘鸿诗 胡晓燕 陈彬 胡丹 宋建锋 李夏 

机构地区：[1]浙江省辐射环境监测站,浙江杭州310012

出　　处：《原子能科学技术》2013年第10期1906-1915,共10页Atomic Energy Science and Technology

摘　　要：浙江省辐射环境监测站对秦山核电基地外围环境放射性水平的20年监督性监测结果表明,秦山核电基地外围环境γ辐射剂量率,气溶胶中总α、总β、40K、137Cs的活度浓度,沉降物中总β日沉降量,空气中14CO2活度浓度,陆地淡水(饮用水、湖塘水、井水)中总α、总β、90Sr、137Cs的活度浓度,土壤中γ核素238U、232Th、226Ra、137Cs的比活度,生物样品中放射性核素40K、137Cs、90Sr及14C的比活度,均未发现异常,与对照点监测值和运行前本底调查值相比,属同一水平。空气、雨水、地表水、饮用水、排放口海水和陆生植物样品中3H活度浓度均高于相应对照点监测值,部分介质中3H活度浓度远高于基地运行前相应的本底。说明秦山核电基地20年的运行,特别是秦山三期重水堆运行之后,其外围环境已受到基地流出物中3H排放的影响。In the past twenty years ,a continuous supervision monitoring of environmen-tal radioactivity level around Qinshan NPP （QNPP） Base was carried out by Zhejiang Province Radiation Environmental Monitoring Center .The monitoring results show that theγradiation dose rate around QNPP Base ,the activity concentration of gross α,grossβ,40 K ,and 137 Cs in aerosol samples ,the grossβdaily settlement in fallout ,the activity concentration of 14 CO2 in air ,the activity concentration of gross α,gross β, 90 Sr ,and 137 Cs in environmental freshwater （drinking water , lake water and well water ） , the average specific activity of 238 U ,232 Th ,226 Ra ,and 137 Cs in soils ,and the average specif-ic activity of 40 K ,137 Cs ,90 Sr ,and 14 C in edible plants ,are not abnormal .The radionu-clide contents in those samples are of the same levels compared with the background values before the operation of QNPP Base and the monitored values of Hangzhou refer-ence site . However , the activity concentrations of 3 H in air , rain water , drinking water ,pond water ,sea water of discharge site ,and terrestrial plants are higher than the monitored values of Hangzhou reference site ,and in some medium the activity concen-trations of 3 H outclass that of background around QNPP Base .The results indicate that after 20 years operation of QNPP Base ,especially after the third phase heavy water reactors operation commercially ,the external environment around QNPP Base has been affected by 3 H in radioactive effluent .

关 键 词：环境放射性 监督监测 秦山核电基地 

分 类 号：K837[历史地理—历史学]