某铀矿山退役治理尾渣库覆土实验  

Experiment on Soil Covering of Tailings Reservoir After Decommissioning of a Uranium Mine

作　　者：赵晗 许俊 Zhao Han;Xu Jun(Beijing Tongnong Detection Technology Co.,Ltd.,Beijing,100000;Beijing Institute of Chemical Metallurgy of Nuclear Industry,Beijing,100000)

机构地区：[1]北京通农检测技术有限公司,北京100000 [2]核工业北京化工冶金研究院,北京100000

出　　处：《当代化工研究》2023年第5期28-30,共3页Modern Chemical Research

摘　　要：某即将退役铀矿尾渣库面积约14000m^(2)。据监测、取样分析,尾渣库(0~20cm)天然铀含量在(10.5~71.2)mg/kg范围内,平均值为49.8mg/kg;镭-226含量在(984~5027)Bq/kg范围内,平均值为4014Bq/kg。表面氡析出率范围为(3.552~4.889)Bq/(m^(2)·s),平均氡析出率为3.79Bq/(m^(2)·s)γ辐射剂量率范围为(1247~2143)nGy/h。为了给铀矿退役治理工程项目尾渣库退役处置提供基础资料,在尾渣库上进行了现场覆土实验。通过在实验场地覆盖不同厚度的土壤,监测γ辐射剂量率与表面氡析出率在不同土壤覆盖下的变化趋势,从而核算出尾渣库达标退役需要的覆土厚度。The tailings storage area of a decommissioned uranium mine is about 14000 m^(2).According to monitoring,sampling and analysis,the natural uranium content in the tailings reservoir(0~20 cm)is in the range of(10.5~71.2)mg/kg,with an average of 49.8 mg/kg;The content of radium-226 is in the range of(984~5027)bq/kg,with an average of 4014 Bq/kg.The surface radon exhalation rate ranges from(3.552~4.889)Bq/(m^(2)·s),the average radon exhalation rate is 3.79 bq/(m^(2)·s)γradiation dose rate ranges from(1247~2143)nGy/h.In order to provide basic data for the decommissioning and disposal of tailings reservoir of uranium mine decommissioning treatment project,on-site soil covering experiment was carried out on tailings reservoir.By covering different thicknesses of soil in the experimental site,the change trend ofγradiation dose rate and radon exhalation rate on the surface under different soil covers is monitored,so as to calculate the thickness of soil cover required for the tailings reservoir to reach the standard and retire.

关 键 词：铀矿山 退役治理 覆土实验 Γ辐射剂量率 

分 类 号：TQ423.2[化学工程]