北方某露天铀伴生矿辐射防护实践和剂量估算

Radiation Protection and Dose Estimation of an Open-pit Uranium Associated Mine in North China

对北方某露天硼铁铀伴生矿进行了γ剂量率、氡浓度、放射性气溶胶辐射特征的检测和个人剂量估算,分析了该矿不同工艺的辐射特点。结果表明,该矿的γ辐射主要集中在重选摇床、带式过滤机、产品库以及受到污染的运输车辆和磨矿机附近,氡内照射危害主要存在于浸出厂房,不存在气溶胶危害。建议该企业对摇床、带式过滤机操作人员加强培训,减少自动作业时人员的驻留,对产品桶及时加盖,对受污染设备及时发现和清洗;对浸出厂房加强通风。

An open-pit boron-iron-uranium associated mine in north China was investigated.The gamma dose rate,radon concentration and radioactive aerosol radiation characteristics of the mine were detected and the individual dose estimation was carried out.The results show that the gamma external irradiation of the mine is mainly concentrated in the vicinity of gravity separation rocker,belt filter,product warehouse and contaminated vehicles and grinding machines.The hazards of radon internal irradiation mainly exist in the leaching plant,and there is no aerosol hazard.The enterprise should strengthen the training of operators of rocking table and belt filter to reduce the residence of personnel in automatic operation,the product barrels should be covered in time,the contaminated equipment should be detected and cleaned in time,ventilation should be strengthened for leaching plant.