四川九龙县锂铍稀有金属矿区天然放射性水平评价  

Evaluation of natural radioactivity level of lithium-beryllium rare metal mining area in Jiulong County, Sichuan

作　　者：张永恒 李勇 侯学文 ZHANG Yongheng;LI Yong;HOU Xuewen(Research Institute No.280,CNNC,Guanghan,Sichuan 618300,China;Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]核工业二八〇研究所,四川广汉618300 [2]成都理工大学,成都610059

出　　处：《世界核地质科学》2019年第3期174-178,共5页World Nuclear Geoscience

摘　　要：主要论述了九龙县锂铍稀有金属矿区天然放射性评价的方法和结果,在矿区地表开展γ辐射空气吸收剂量率、238U、232Th、40K活度浓度测量,同时对矿体、围岩进行化学取样分析,以及矿区主要的地表水、地下水样进行水中总α、总β放射性活度及镭、钍、钾、氡含量取样分析。结果表明,全区γ辐射空气吸收剂量率平均值为106.4 nGy·h^-1,锂、铍矿体的238U、232Th、40K活度浓度平均值分别为0.098、0.056、0.801、0.079 Bq·g^-1、0.110 Bq·g^-1和1.155 Bq·g^-1。矿区水体总α放射性平均值为0.047 1 Bq·L^-1,总β放射性平均值为0.093 1 Bq·L^-1。本次通过对矿区的放射性水平的调查,对矿区锂铍矿安全开发与利用决策提供参考依据。This paper mainly discussed the methods and results of natural radioactivity evaluation in the lithium-beryllium rare metal mining area of Jiulong County.The air absorbed dose rate of gamma radiation,238U,232Th and 40K activity concentration were measured on the surface of the mining area.At the same time,chemical sampling and analysis of ore bodies and wall rocks were carried out.The main surface water and groundwater samples in the mining area were also analyzed for total alpha,total beta radioactivity and the content of radium,thorium,potassium and radon.The results show that the average absorbed dose rate of gamma radiation in the whole area is 106.4 nGy·h^-1.The average activity concentration of 238U,232Th and 40K in lithium and beryllium ore bodies are 0.098,0.056,0.801,0.079,0.110 and 1.155 Bq·g^-1,respectively.The average value of total alpha radioactivity and total beta radioactivity in mine water is 0.047 1 Bq·L^-1 and 0.093 1 Bq·L^-1 respectively.Through the investigation of the radioactive level in the mining area,this paper provides a reference for the decision-making of the safe development and utilization of the lithium beryllium mine area.

关 键 词：空气吸收剂量率 活度浓度 锂铍矿 天然放射性水平 四川 

分 类 号：X837[环境科学与工程—环境工程]