尾矿库伴生放射性污染清除水平估算研究  

Estimation of the cleanup level of naturally occurring radioactive pollution in tailings pond

作　　者：刘金生 

机构地区：[1]核技术应用教育部工程研究中心东华理工大学水资源与环境工程学院,江西南昌330013

出　　处：《环境污染与防治》2014年第12期46-49,共4页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.41261078);江西省自然科学基金资助项目(No.20114BAB203029);核技术应用教育部工程研究中心开放基金资助项目(No.HJSJYB2011-09)

摘　　要：通过RESRAD程序模拟估算了某尾矿库伴生放射性污染清除水平,同时对尾矿库中的232 Th模拟估算参数进行设定,并对剂量约束限值的确定、照射情景分析、照射途径设定、模式参数设定、计算机模拟估算清除水平及估算结果分析等进行了分析研究。结果表明,此尾矿库中232 Th及其长寿命子体所致最大年有效剂量约为10.7mSv/a,超出了预设的0.25mSv/a的剂量约束限值;致癌风险0.023 5,远超出人们的可接受水平;当在剂量约束限值为0.25mSv/a时,此尾矿库土壤中的232 Th清除水平为0.047Bq/g。通过分析表明,该尾矿库开放前,必须采取一定措施,进行清除工作。The cleanup level of mineral naturally occurring radioactive pollution was estimated by using RESRAD program.Base on the parameters setting of 232Th in one tailings pond,RESRAD program estimated the cleanup level of naturally occurring radioactive pollution.The dose constraint value,irradiation scenarios,the settings of the exposure pathways,model parameters and the estimation results were also analyzed in this paper.The estimation results showed that the irradiation dose value of 232Th and its long-lived daughters was about 10.7 mSv/a,which exceeded the threshold dose of 0.25 mSv/a.Meanwhile,the cancer risk of tailing pond was about to 0.023 5,which was far beyond the acceptable level.The simulation result of RESRAD revealed that the cleanup level of 232 Th in tailings pond soil was 0.047 Bq/g when the dose limit was 0.25 mSv/a.So,some cleanup works were needed before the tailing pond opening.

关 键 词：伴生放射性污染 尾矿库 RESRAD程序 模拟估算 清除水平 

分 类 号：X751[环境科学与工程—环境工程] X591