铀矿区居民室内氡污染水平调查与原因分析  

Investigation and analysis of indoor radon pollution in the uranium ore district

作　　者：王志勇[1,2] 刘畅荣[2] 王汉青[2] 周星火[3] 

机构地区：[1]中南大学能源科学与工程学院,湖南长沙410083 [2]湖南工业大学土木工程学院,湖南株洲412008 [3]南华大学核资源与安全工程学院,湖南衡阳421001

出　　处：《环境污染与防治》2010年第6期15-18,共4页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.10775047)

摘　　要：铀矿区某居民点室内氡污染较重,氡浓度和居民所受到的个人辐射剂量远高于国家限值。为了查明氡污染的原因,在现场测量的基础上,通过大气扩散高斯模式计算分析了铀矿井排风口、堆浸场、废石场等气载源项对居民点的辐射剂量贡献。结果表明,各气载源项释放的氡对居民点氡浓度的贡献只有38.08Bq/m3,约占门窗开启的室内氡浓度的16.3%。而居民室内的土壤氡析出对室内氡浓度的贡献为154.29Bq/m3,约占门窗开启的室内氡浓度的65.9%。由此可见,居民点氡浓度过高主要是由于土壤氡析出所致。Indoor radon pollution in residential area of uranium ore district was serious,the radon concentration and personal radiation dose were much higher than maximum value of nation standard.In order to find out the reason of radon pollution,the contribution of airborne pollution source terms including uranium mine ventilation shaft,heap leaching field and waste rock yards to indoor radon concentration was analyzed through the calculations of Gaussian atmospheric diffusion model and based on the measurement in the field.The results showed that the contribution of airborne pollution source terms to indoor radon concentration was only 38.08 Bq/m3,accounting for 16.3% of the total.But the radon concentration caused by radon exhalation from the soil was 154.29 Bq/m3,whose contribution to indoor radon concentration was 65.9%.It could be seen that the higher radon concentration of the residence was mainly due to radon exhalation from the soil.

关 键 词：铀矿区 氡 污染 

分 类 号：X591[环境科学与工程—环境工程]