铀尾矿中铀和镭的释放和迁移计算

The calculation of liberation and transport of uranium and radium from a uranium tailing

采用考虑弥散的数学模型计算272厂铀尾矿中^(238)U、^(230)Th、^(226)Ra、^(210)Pb和^(210)Po的释放和迁移过程。结果表明:在300年的时间尺度上,272厂铀尾矿中的^(210)Po、^(230)Th、^(210)Pb不能到达距离200m处的水井;水井中^(238)U和^(226)Ra的活度浓度和累积活度均呈指数增长;^(238)U、^(226)Ra的活度浓度将分别经过10、50a左右超过《生活饮用水卫生标准》(GB 5749—2006)的总α放射性≤0.5Bq/L的要求。

Mathematical model considering dispersion was used to calculate the nuclides of ^（238）U,^（230）Th,^（226）Ra,^（210）Pb and ^（210）Po liberated and transported by 272 uranium tailing.Results showed that：along 300 a,^（210）Po,^（230）Th and ^（210）Pb could not reach the well 200 maway;activity concentration and cumulative activity of ^（238）U and ^（226）Ra in the well expanded exponentially;activity concentration of ^（238）U and ^（226）Ra would exceed ＂Standards for drinking water quality＂（GB 5749-2006） of totalαradioactivity≤0.5 Bq/L after about 10,50 years.