云南磷酸盐伴生放射性普查成果分析  

Analysis of the Survey Results of Phosphate Associated Radioactivity in Yunnan

作　　者：李云艳 闫俊丞 朱尤志 LI Yun-yan;YAN Jun-cheng;ZHUYou-zhi(Yunnan Radioactive Environment Supervision Station,Kunming Yunnan 650032,China)

机构地区：[1]云南省辐射环境监督站,云南昆明650032

出　　处：《环境科学导刊》2024年第2期48-51,共4页Environmental Science Survey

摘　　要：基于云南省磷酸盐行业企业的伴生放射性普查数据,结合云南磷酸盐资源分布,对云南磷酸盐天然放射性水平进行了统计和分析。结果表明:云南省磷酸盐保有资源储量居全国第2位,磷酸盐企业主要分布于昆明市(占比80%)、玉溪市、曲靖市、昭通市及红河州;云南省磷酸盐γ辐射剂量率监测平均值为152 nGy/h,高出对照点γ辐射剂量率约1倍;放射性核素伴随整个工艺流程均有不同程度的转移;磷酸盐原矿、废石废渣、普钙重钙及废料等固体污染物放射性水平相当,U-Ra基本平衡,U-Th明显偏U,^(232)Th含量较低;磷酸盐原料中,大部分^(238)U和^(226)Ra活度浓度集中在120~300 Bq/kg。Based on the survey data of associated radioactivity of phosphate industry enterprises in Yunnan Province and the distribution of phosphate resources in Yunnan province,the natural radioactivity level of phosphate in Yunnan Province was statistically analyzed.The results showed that the reserves of phosphate resources in Yunnan Province ranked second in China,and phosphate enterprises were mainly distributed in Kunming(80%),Yuxi,Qujing,Zhaotong and Honghe Prefecture.The average monitoring value of phosphate gamma radiation dose rate in Yunnan Province is 152 nGy/h,which is about 1 times higher than the control point.Radionuclides were transferred to different degrees along with the whole process.The levels of solid pollutants such as raw phosphate ore,waste rock and waste slag,common calcium heavy calcium and waste were similar,U-RA was basically balanced,U-TH was obviously biased towards U,and ^(232)Th content was low.In phosphate raw materials,most of the ^(238)U and ^(226)Ra activity concentrations were concentrated between 120 and 300 Bq/kg.The migration rule and enrichment effect of radionuclides in phosphate should be studied.

关 键 词：磷酸盐 伴生放射性矿 污染源普查 云南 

分 类 号：X591[环境科学与工程—环境工程]