湖北省长江干流生活饮用水水源地放射性水平分析

Analysis of Radioactivity Levels in Drinking Water Sources in the Mainstream of Yangtze River in Hubei Province

文章对2016年湖北省长江干流生活饮用水水源地开展放射性水平监测,分丰水期和枯水期采集水样,采用国家标准分析方法测量。结果表明,湖北省长江干流生活饮用水水源地放射性核素水平与1988年长江水系天然放射性核素水平相比,总α、总β、U、Th、^(226)Ra、^(40)K、^(90)Sr、^(137)Cs均在本底范围内,其中总α、^(90)Sr、^(226)Ra有降低趋势,^(40)K有所增加,总β、U、Th、^(137)Cs涨落不明显;与2011-2016年湖北省国控断面及2016年长江流域水环境样品放射性水平监测相比,均在其变化范围内。总α、总β放射性活度浓度满足《生活饮用水卫生标准》(GB 5749-2006)限值要求。

To investigated the radionuclide activity concentrations in drinking water sources in Hubei section in the mainstream of Yangtze River in 2016,samples were collected in wet season and dry season,and admeasuried by Standard Examination Methods.The results showed that the radionuclide level was within the monitoring range of the national control of Hubei Province from 2011 to 2016 and radioactivity level monitoring of water environment samples in the Yangtze River Basin in2016.Compared with the natural radioactivity concentrationreference rang of the Yangtze River system in 1988,Total alpha,strontium-90 and radium-226 all have andownward trendwhile potassium-40 has increased.Other nuclide activity concentration fluctuations are not obvious.The concentration of radioactivity of total alpha and total beta meets the limit requirements of the Sanitary Standard for Drinking Water(GB 5749-2006).