【摘要】 对2010—2019年西大亚湾海水中氚的活度浓度分布及其影响因素进行了研究。结果表明:2010—2019年西大亚湾海水中氚活度浓度均值为1.0～4.4 Bq/L。大亚湾核电基地液态流出物的氚排放会使得西大亚湾海水中氚活度浓度升高。总体而言,氚活度浓度与离排放口距离呈显著负相关(相关系数(r)=-0.905),但并未发现逐年累积趋势;大亚湾核电基地排放的氚在西大亚湾内的稀释扩散非常快,12.5 h(约1个半日潮)后,氚的活度浓度基本可以降到探测限以下;西大亚湾海水中的氚活度浓度受到大亚湾核电基地的氚排放、离排放口距离、排放与采样时间差、潮流等因素的综合影响。更多还原

【Abstract】 The distribution of tritium activity concentration and its influencing factors in sea water of west Daya Bay from 2010 to 2019 were studied. Results showed that the average of tritium activity concentration in the sea water of west Daya Bay from 2010 to 2019 was 1.0-4.4 Bq/L. Tritium discharged by Daya Bay nuclear power station would make tritium activity concentration increase in west Daya Bay. Tritium activity concentration was negatively correlated with the distance from the discharge outlet significantly with the correlation coefficient of-0.905. However, there was no cumulative trend. The dilution and diffusion was very fast after Daya Bay nuclear power station discharged tritium. The tritium activity concentration would decrease to below limit of detection after 12.5 h(about 1 semi-diurnal tide). On the whole, tritium activity concentration in the sea water of west Daya Bay was comprehensively affected by the tritium discharge of Daya Bay nuclear power station, the distance from the discharge outlet, the time delay from discharge to sampling, and tide.更多还原