内蒙古城市土壤放射性水平分析及外照射水平估算  

Analysis of soil radioactivity level and estimation of external exposure level in major cities of Inner Mongolia Autonomous Region

作　　者：王玮 李鑫 郑鑫 李妍 朱云龙 高蓉 WANG Wei;LI Xin;ZHENG Xin;LI Yan;ZHU Yunlong;GAO Rong(Inner Mongolia Autonomous Region Nuclear and Radiation Monitoring Center,Inner Mongolia Autonomous Region,Baotou 014060)

机构地区：[1]内蒙古自治区核与辐射监测中心,内蒙古包头014060

出　　处：《辐射防护通讯》2025年第1期34-39,共6页Radiation Protection Bulletin

摘　　要：本文分析了内蒙古2016—2023年(“十三五”至“十四五”中期)12个地级市(盟)政府所在地城市土壤中放射性水平。结果表明,12个盟市城市土壤γ能谱测得的天然放射性核素^(238)U、^(232)Th、^(226)Ra、^(40)K含量处于本底涨落水平,与1983—1990年内蒙古自治区土壤中天然放射性水平调查结果相当,人工放射性核素^(137)Cs未见异常;通过外照射指数与等效镭浓度对12个盟市环境中γ辐射水平进行评价,评价结果为12个盟市外照射指数、等效镭浓度均在容许值范围内,内蒙古12个盟市城市土壤的外照射水平属于安全范畴。This paper analyzes the radioactivity levels in the surface soil of 12 major cities in Inner Mongolia Autonomous Region from 2016 to 2023(from the 13th Five-year Plan to the middle of the 14th Five-year Plan).The results show that there is no significant change of^(238)U,^(232)Th,^(226)Ra,^(40)K radioactivity level in 12 major cities compared with the range of the survey results of the natural radioactivity level in the soil of Inner Mongolia Autonomous Region from 1983 to 1990,and no abnormalities were observed in the artificial radionuclide^(137)Cs.Evaluation ofγradiation levels in 12 major urban environments were made by using external exposure index and equivalent radium concentration.The evaluation results showed that the external exposure index and the equivalent radium concentration in 12 major cities were within the allowable value range.The external exposure level of soil in the 12 major cities in Inner Mongolia Autonomous Region is in compliance with national regulation.

关 键 词：土壤 放射性水平 外照射指数 等效镭浓度 内蒙古 

分 类 号：R73[医药卫生—肿瘤]