广东省某伴生放射性矿开发利用企业辐射环境监测

Radiation Environment Monitoring of a NORM Development and Utilization Enterprise in Guangdong

报道广东省某独居石生产伴生放射性矿开发利用企业辐射环境监测工作。监测结果显示:2019、2020年度,该企业周围区域内γ辐射空气吸收剂量率为113~263 nGy/h;空气中氡浓度为<3.7~25.4 Bq/m^(3),钍射气浓度为5.9~14.2 Bq/m^(3);土壤中U、Th和^(226)Ra含量分别为0.99~4.85 mg/kg、31.4~90.0 mg/kg和18.9~57.9 Bq/kg;地下水中U、Th和^(226)Ra含量分别为<0.04~0.10μg/L、<0.05~0.16μg/L和<2.0~5.7 mBq/L;排放废气中的U、Th总量远小于稀土工业污染物排放标准限值。

We report the radiation environment monitoring of an enterprise developing and utilizing monazite in Guangdong Province.The results show that in 2019 and 2020,the air absorption dose rate of γ radiation in the surrounding area is 113-263 nGy/h.The concentrations of radon and thorium in air are less than 3.7-25.4 Bq/m^(3) and 5.9-14.2 Bq/m^(3) respectively.The contents of U,Th and ^(226)Ra are 0.99-4.85 mg/kg,31.4-90.0 mg/kg and 18.9-57.9 Bq/kg,respectively.The contents of U,Th and ^(226)Ra in groundwater were<0.04-0.10μg/L,<0.05-0.16μg/L and<2.0-5.7 mBq/L,respectively.The total amount of U and Th in wastewate is far less than the standard discharge limit of pollutants in rare earth industries.