铀矿山废石堆与尾矿库覆盖抑氡实验效果对比研究  

Comparison on radon suppression effects of covering tests between waste rock heap and tailing ponds

作　　者：张辉[1] 徐乐昌[1] 李先杰[1] 

机构地区：[1]核工业北京化工冶金研究院,北京101149

出　　处：《辐射防护》2017年第5期387-392,共6页Radiation Protection

摘　　要：覆土抑氡是铀矿冶场址退役重要手段,覆土实验研究结果可为退役治理工程的设计与环境影响评价等工作提供科学依据。研究针对废石堆与尾矿库两种典型铀矿冶退役覆盖场地,设计覆土试验,确定了覆盖介质、覆土场地尺寸、压实度、监测方法等。根据覆土实验结果对比讨论两种场地氡析出率、覆土厚度、介质扩散系数之间的关系,建立了相应的函数关系表达式。结果表明,两种覆盖场地覆土厚度与氡抑制效果显著相关,但废石堆与尾矿库在覆盖过程中覆土厚度与氡抑制效果在不同的覆土层表现不同。研究结果可应用于指导覆土施工现场工作。It is of great importance for soil covering as radon suppression approach in uranium mining and metallurgy site decommission. The results of soil covering test can provide scientific basis for the design and environmental impact assessment of decommissioning work. Two typical uranium mining decommissioning sites,waste rock heap and tailings are studied. According to the soil covering test results,the relationship between radon flux rate,soil thickness and diffusion coefficient of two kinds of sites are discussed,and the corresponding function is established. The results show that the thickness of overlying soil is significantly related to the radon suppression effect of two kinds of covering sites. The research results can be applied to guide the onsite project.

关 键 词：覆土实验 氡析出率 辐射防护 

分 类 号：X753[环境科学与工程—环境工程]