中国核电站附近的沿海海水中的:来源,分布和环境影响
Sixuan Li1, Youyi Ni2, Qiuju Guo1
1State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China.
Marine pollution bulletin
|August 23, 2024
概括
在中国核电站附近的沿海水域中发现的 (Pu) 同位素显示其起源来自太平洋试验区和全球降落. 这些同位素显示出远程运输,在北湾观察到积累.
科学领域:
- 环境科学 环境科学
- 放射化学 放射化学是指辐射化学.
- 海洋学 海洋学 海洋学
背景情况:
- 核活动会向海洋环境释放放射性核素.
- 了解 (Pu) 的来源和运输对于环境监测至关重要.
- 沿海生态系统容易受到放射性核酸污染的影响.
研究的目的:
- 调查中国核电站周围沿海表面海水中的 (Pu) 同位素的来源和分布.
- 为了确定太平洋试验场 (PPG) 和全球降落对Pu水平的贡献.
- 了解中国海中的运输路径和积累情况.
主要方法:
- 在中国十个核电站30公里范围内,对沿海表面海水进行系统采样.
- 测量239+240Pu活动度和240Pu/239Pu原子比.
- 分析同位素数据以确定的来源和运输模式.
主要成果:
- 239+240Pu活动度在0.226到3.098 mBq/m3之间.
- 240Pu/239Pu原子比在0.151和0.353.3之间变化.
- 太平洋试验场 (PPG) 的近距离降落和全球降落被确定为主要Pu来源.
- 的度和PPG贡献与Kuroshio入侵和沿海海流相关.
- 由于从南中国海 (SCS) 的重新调动,在北湾观察到PPG来源的Pu的积累.
结论:
- PPG和全球降落是中国沿海水域的重要来源.
- PPG衍生的Pu的远程运输和消费发生在中国海.
- 贝布湾显示了的积累,受到SCS重新调动和沿海电流的影响.
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