大亚湾核电站水口水域海洋沉积物中放射性核素的分布。
Distribution of radionuclides in a marine sediment core off the waterspout of the nuclear power plants in Daya Bay, northeastern South China Sea.
机构信息
South China Sea Environment Monitoring Center, State Oceanic Administration (SOA), Guangzhou 510300, PR China; South China Sea Testing and Appraisal Center, State Oceanic Administration (SOA), Guangzhou 510300, PR China.
South China Sea Environment Monitoring Center, State Oceanic Administration (SOA), Guangzhou 510300, PR China; South China Sea Testing and Appraisal Center, State Oceanic Administration (SOA), Guangzhou 510300, PR China.
出版信息
J Environ Radioact. 2015 Jul;145:102-112. doi: 10.1016/j.jenvrad.2015.03.018. Epub 2015 Apr 24.
A sediment core was collected and dated using (210)Pbex dating method off the waterspout of nuclear power base of Daya Bay, northeastern South China Sea. The γ-emitting radionuclides were analyzed using HPGe γ spectrometry, gross alpha and beta radioactivity as well as other geochemical indicators were deliberated to assess the impact of nuclear power plants (NPP) operation and to study the past environment changes. It suggested that NPP provided no new radioactivity source to sediment based on the low specific activity of (137)Cs. Two broad peaks of TOC, TC and LOI accorded well with the commercial operations of Daya Bay NPP (1994.2 and 1994.5) and LNPP Phase I (2002.5 and 2003.3), implying that the mass input of cooling water from NPP may result into a substantial change in the ecological environment and Daya Bay has been severely impacted by human activities.
采用（210）Pbex 测年方法在南海东北部大亚湾核电基地水龙卷处采集并定年了一个沉积物岩芯。利用 HPGe γ 能谱仪分析了 γ 放射性核素，同时还讨论了总 α 和总 β 放射性以及其他地球化学指标，以评估核电站（NPP）运行的影响，并研究过去的环境变化。结果表明，基于（137）Cs 的低比活度，NPP 并未向沉积物提供新的放射性物质源。TOC、TC 和 LOI 的两个大峰值与大亚湾 NPP 的商业运行（1994.2 和 1994.5）以及 LNPP 一期（2002.5 和 2003.3）吻合较好，这表明 NPP 冷却用水的大量输入可能导致生态环境发生重大变化，大亚湾已经受到人类活动的严重影响。
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