| 摘要: |
| 对2007—2015年长江流域四川段主要12条江河水体放射性核素活度浓度的监测结果进行了分析。结果表明，四川段主要江河放射性核素水平远低于我国规定的露天水源的限制浓度。与1995年中国环境天然放射性（四川省部分）、1988年长江水系天然放射性活度浓度参考范围相比，U、Th、226Ra、40K、137Cs均有上升趋势，其他核素活度浓度涨落不明显均在本底范围内。总 α、总 β放射性活度浓度测值均符合《生活饮用水卫生标准》（GB 5749—2006）的限值要求。 |
| 关键词: 长江流域四川段 江河 放射性水平 限值 |
| DOI： |
| 分类号:X837 |
| 文献标识码:B |
| 基金项目: |
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| Analysis on Radioactivity Levels of Major Rivers Located in Sichuan Section of Yangtze River from 2007 to 2015 |
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TANG Yanbo
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Management & Monitoring Center of Rediant Environmentin Sichuan Province, Chengdu, Sichuan 611139, China
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| Abstract: |
| The monitoring results of radionuclide activity concentrations in 12 major river water bodies in Sichuan section of Yangtze River during 2007—2015 were reported. The monitoring results showed that the radionuclide level of major rivers in Sichuan is much lower than the limit concentration of open water in China. Uranium, thorium, radium-226, potassium-40 and cesium-137 all have an upward trend compared with the natural radioactivity concentration reference range of the Yangtze River system in 1988 and the natural radioactivity concentration in China in 1995 (Sichuan section). Activity concentration fluctuation is not obvious within the background range. Total α, total β radioactivity concentration measured values meet the limits set by “drinking water standards”（GB 5749—2006）. |
| Key words: Sichuan section of yangtze river The rivers Radioactivity level Limit |
