北山地下实验室场区及周边环境空气氡浓度水平调查研究  

Investigation and study on environmental radon concentration around the Beishan URL

作　　者：夏子通[1] 凌辉[1,2] 范文哲 贺三军 XIA Zitong;LING Hui;FAN Wenzhe;XIAO Sanjun(Beijing Research Institute of Uranium Geology,Beijing 100029,China;CAEA Innovation Center for Geological Disposal of High-Level Radioactive Waste,Beijing 100029,China;University of South China,Hengyang 421001,China)

机构地区：[1]核工业北京地质研究院,北京100029 [2]中国国家原子能机构高放废物地质处置创新中心,北京100029 [3]南华大学,湖南衡阳421001

出　　处：《世界核地质科学》2025年第1期146-154,共9页World Nuclear Geoscience

基　　金：中国国家原子能机构核设施退役与放射性废物治理专项(编号:科工二司[2020]194号)资助。

摘　　要：采用径迹法对北山地下实验室场区和周边区域的空气氡浓度进行为期一年的调查,查明区域的氡浓度本底水平,分析人为活动和气象因素对氡浓度的影响。结果表明,区域空气氡浓度范围介于10~64 Bq·m^(-3)之间,平均值为27 Bq·m^(-3),场区外、科研管理区和运行维护区的氡浓度水平差异较小,人为活动对区域氡浓度的影响较为有限;根据皮尔逊相关系数分析结果,氡浓度与温度呈正相关,不同季节的氡浓度差异与温度相关性分析结果一致;风速对氡浓度的影响较为复杂,两者没有表现出明显的相关性。本研究为北山地下实验室的氡气长期监测及健康风险评估提供数据支撑和经验反馈。A year-long investigation of air radon concentration at Beishan URL site and its surrounding areas was carried out using solid-state nuclear track detectors at 24 points,with quarterly sampling and measurements conducted.The results indicated that the annual radon concentration in the region ranged from 10 to 64 Bq·m^(-3),with a geometric mean(GM)of 27 Bq·m^(-3).The overall radon levels exhibited distinct seasonal variations,with the highest concentrations occurring from April to June and the lowest from January to March.The differences in radon concentrations between different areas were small and remained relatively stable.Construction disturbances in the active construction zones had a localized impact on radon concentrations,but due to favorable air diffusion conditions,this effect did not result in a widespread increase in radon levels.This suggests that the direct impact of human activities on regional radon concentrations is limited.According to the Pearson correlation coefficient analysis,a significant positive correlation was observed between temperature and radon concentrations,with radon levels increasing as temperatures rose at most measurement points.In contrast,the influence of wind speed on radon concentrations was more complex,with considerable variability in correlation across different points,likely influenced by other factors,warranting further investigation.This study provides data support and practical insights for long-term radon monitoring and health risk assessment at the Beishan URL.

关 键 词：氡 北山地下实验室 皮尔逊相关系数 花岗岩 固体径迹法 

分 类 号：X75[环境科学与工程—环境工程]