广东省环境水体中的氚活度浓度水平

2012—2013年对广东省全省范围内环境水体氚活度浓度水平进行了调查,并对调查结果进行了分析研究。结果表明:(1)空气水蒸气、江河水、水库水的氚活度浓度水平显著高于海水、地下水氚活度浓度水平(p＜0.01),空气水蒸气活度浓度水平明显高于雨水氚活度浓度水平(p＜0.05);(2)江河水、雨水的氚活度浓度水平与空气水蒸气的氚活度浓度水平相关(相关系数分别为0.655和0.637, p＜0.01),雨水中的氚也会对水库水、江河水氚活度产生影响(相关系数分别为0.444和0.440,p＜0.1);(3)本次调查结果基本与历史数据相符,目前广东省环境水中氚活度浓度水平在<0.081~0.69 Bq/L之间,已基本接近核爆前天然本底水平;(4)大亚湾/岭澳核电站附近环境水中氚的活度浓度水平比广东省其他地区高5~10倍左右。

Tritium activity concentration levels in environmental water in Guangdong Province

Tritium activity concentration levels in environmental water in Guangdong Province were surveyed between 2012 and 2013.The results showed that:(1) Tritium activity concentration levels of water vapor in the air,river water,and reservoir water were significantly higher than those in sea water and ground water (p ＜0.01).Tritium activity concentration level of water vapor in the air was higher than that of rainfall (p ＜ 0.05);(2) Tritium activity concentration levels of river water and rainfall correlated with that of water vapor in the air (The Pearson correlation coefficients were 0.655 and 0.637,respectively;p ＜ 0.01).Tritium activity concentration levels of reservoir water and river water were also affected by rainfall (The Pearson correlation coefficients were 0.444 and 0.440,respectively;p ＜ 0.1);(3) The survey results were consistent with historical data.The present tritium activity concentration levels in environmental water in Guangdong Province ranged from 0.081 to 0.69 Bq/L,which are close to pre-bomb levels;(4) Tritium activity concentration levels in environmental water around Daya Bay and Ling'ao nuclear power plants were about 5 to10 times higher than the rest of Guangdong Province.