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某铀矿山尾矿库周围大气环境氡及γ辐射水平调查
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摘要
采用KF606B型氡和γ累积剂量计对某铀矿山尾矿库及周边环境空气中氡活度浓度及γ辐射水平进行调查,并对公众附加受照剂量进行估算。调查结果表明:无论是尾矿库内还是坝体上,空气中氡活度浓度和γ剂量率均高于对照点;铀尾矿库内空气中氡活度浓度和γ剂量率均高于周围村庄,分别为周围村庄的2倍和4倍;周围公众年附加有效剂量范围为0.168~0.796 mSv,均值0.522 mSv,低于国家标准规定的1.0 mSv公众个人剂量限值。
The radon concentration and gamma-radiation dose rate in the air were investigated using radon and gamma cumulative dose monitors called KF606 B in a uranium tailings pond and its surrounding villages,and the additional annual effective dose from radon and gamma rays to the residents living around the uranium tailings pond was estimated.The results show that whether in the tailings pond or on the dam,radon concentration and gamma-radiation dose rate in the air are higher than that of the control point.The radon concentration and gamma-radiation dose rate in the air in the uranium tailings pond are higher than that of the surrounding villages,respectively 2 times and 4 times.The additional annual effective doses to the residents living around the uranium tailing pond is from 0.168 to 0.796 mSv,and the average value is 0.522 mSv,less than 1.0 mSv of the public individual dose limits.
引文
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