秦山核电基地外围环境大气~3H、^(14)C水平监测

Monitoring of ~3H and ^(14)C Levels in Air External Envinonment around QNPPs

自1992年,浙江省辐射环境监测站对秦山核电基地外围环境辐射水平进行了连续的监督性监测。1993~2005年,基地外围环境大气中3H浓度和以CO2形态释放的14C含量监测结果表明:与基地运行前本底水平及杭州市区对照点比较,夏家湾和杨柳村监测点大气3H浓度有逐步升高趋势;随着2002年12月并网机组的再次增加,在2003~2005年,夏家湾监测点大气3H浓度年平均值分别为129、201和348mBq/m3,分别为1993~2002年总平均值(34.8 mBq/m3)的3.7、5.8和10倍;夏家湾和杨柳村大气中以CO2形态释放的14C含量与杭州市对照点处相同水平。

Concentration levels of 3H and 14C in air around Qinshan Nuclear Power Plants(QNPP) base of Zhejiang Province in 1993～2005 are presented in this paper.The results show that the concentration of 3H in air around Xiajiawan village and Yangliucun village tend to be increase in comparison with radioactive background at QNPP base and reference point of Hangzhou.The average concentration of 3H in air around Xiajiawan village in 2003～2005 is 129、201 and 348 mBq/m3,respectively,being 3.7,5.8 and 10 times the averag...