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张 乾,杨亚新,张卫民,等. 退役铀尾矿库周边环境的放射性水平调查与分析[J]. 科学技术与工程, 2020, 20(10): 4166-4171.
Zhang Qian,et al.Investigation and Analysis of Radioactivity Level around Decommissioned Uranium Tailings Pond[J].Science Technology and Engineering,2020,20(10):4166-4171.
退役铀尾矿库周边环境的放射性水平调查与分析
Investigation and Analysis of Radioactivity Level around Decommissioned Uranium Tailings Pond
投稿时间:2019-07-19  修订日期:2019-08-19
DOI:
中文关键词:  铀尾矿库  氡析出率 γ空气吸收剂量率  镭-226 铀
英文关键词:uranium  tailings pond  radon exhalation  rate γ air  absorbed dose  rate 226radium  uranium
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
              
作者单位
张 乾 东华理工大学核科学与工程学院
杨亚新 东华理工大学核资源与环境国家重点实验室
张卫民 东华理工大学核资源与环境国家重点实验室
吴信民 东华理工大学核科学与工程学院
罗齐彬 东华理工大学核资源与环境国家重点实验室
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中文摘要:
      为了了解退役铀尾矿库周边的放射性水平,通过对地表氡析出率、γ空气吸收剂量率和丰水期、平水期以及枯水期水中镭和铀的含量进行测量,并与标准限值对比,同时采用单因子指数法对数据进行污染分析。结果表明:铀尾矿库的γ辐射剂量率整体处于规定限值(69.8+174 nGy/h)之下,均值为45.6 nGy/h,所致当地居民人均年有效剂量当量为0.09 mSv;地表氡析出率均值为0.43 Bq/(m2.s),低于规定限值的0.74 Bq/(m2.s)。说明对该铀尾矿库的空气环境的治理取得了良好的效果。对所测量的30个采水样点,丰水期、平水期以及枯水期水中镭的含量范围分别为0.002~0.525 Bq/L、0.002~0.433 Bq/L和0.004~0.507 Bq/L;铀的含量范围分别为0.905~78.3 μg/L、0.26~78.5 μg/L和1.04~85 μg/L。镭-226的含量未超过我国铀矿冶行业相关管理限值1.11 Bq/L,而铀的含量仅个别测点超过了50 μg/L。通过单因子指数法进行污染分析得出,无论是铀标准指数还是镭-226标准指数,平水期好于丰水期,又好于枯水期。
英文摘要:
      In order to understand the radioactivity level around the decommissioned uranium tailings pond, the surface radon exhalation rate, gamma air absorption dose rate and the contents of radium and uranium in the water during the periods of abundant water, normal water and dry water were measured, and compared with the standard limits. Meanwhile, the single factor index method was used to analyze the pollution of the data. The results show that the gamma radiation dose rate of uranium tailings pond is lower than the prescribed limit value (69.8+174 nGy/h), with an average value of 45.6 nGy/h, resulting in an annual effective dose equivalent of 0.09 mSv for the local residents. The average surface radon emission rate is 0.43 Bq/(m2.s), which is lower than the specified limit of 0.74 Bq/(m2.s). It is concluded that the treatment of the air environment of the uranium tailings pond has achieved good results. For the 30 water sample points measured, the content range of radium in the water during abundant season, normal season and dry season are 0.002~0.93 Bq/L, 0.005~2.02 Bq/L and 0.004~1.07 Bq/L, respectively. Uranium content ranges from 0.91 to 134 μg/L, 0.26 to 78.5 μg/L and 1.04 to 435 μg/L respectively. The content of 226Ra did not exceed the regulatory limit of 1.11 Bq/L for uranium mining and metallurgy industry in China, the content of uranium only individual points more than 50 μg/L. Through the pollution analysis by single factor index method, it is concluded that both standard index of uranium and radium-226 standard index, the flat season is better than the wet season, and the wet season is better than the dry season.
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