中南地区铀矿土壤-农作物系统天然核素转移系数研究

Study on Natural Nuclide Transfer Coefficient of Uranium Mine Soil-crop System in Central and South China

通过对中南地区湖南、广西、江西、湖北等4省26县40个铀矿所在地的对照点、环境敏感点、覆盖治理铀废矿(渣)堆覆土层及其下方农田等处,进行土壤及其粮食(谷物)、蔬菜、薯类(块茎)等农作物采样,监测分析其天然U、^(226)Ra含量,计算分析土壤-农作物籽实天然核素转移(浓集)系数,并将该核素转移系数应用于辐射环境评价公众个人剂量估算中。本研究得到的中南地区分部位、分作物天然U、^(226)Ra转移(浓集)系数的最新计算成果,可为相关地区辐射环境评价、放射事故应急、放射生态学、耕地污染治理等研究和实践提供参考。

Through the sampling of soil and crops such as grain,vegetable and potato(tuber)in 40 uranium mine sites in 26 counties of 4 provinces including Hunan,Guangxi,Jiangxi and Hubei in Central and South China,the contents of natural U and ^(226)Ra were monitored and analyzed,and the natural nuclide transfer coefficient(TF)between soil and crop seeds was calculated and analyzed,and the nuclide transfer coefficient TF was applied to the public individual dose estimation of radiation environment assessment.The latest calculation results of natural U and ^(226)Ra transfer coefficient(TF)obtained in this study can provide reference for the research and practice of radiation environment assessment,radiation accident emergency,radiation ecology and cultivated land pollution control in relevant areas.