The Age Dating of Deep Paleogroundwater in Jijicao Preselected Site for High Level Radioactive Waste Geological Disposal

2nd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Zhou, Zhichao^1 ; Wang, Ju^1 ; Su, Rui^1 ; Guo, Yonghai^1 ; Li, Jiebiao^1 ; Zhao, Jingbo^1 ; Ji, Ruili^1 ; Zhang, Ming^1 ; Ma, Lihong^1

Beijing Research Institute of Uranium Geology, Beijing, China^1

关键词: Deep boreholes;    Deep groundwaters;    Geological disposals;    Ground-water circulation;    Groundwater mixing;    High level radioactive wastes;    Residence time;    Site investigations;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/170/2/022101/pdf
DOI  :  10.1088/1755-1315/170/2/022101

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The geological disposal of high-level radioactive waste is concerned with the systematic characteristics of the long-time scale of groundwater. As part of the china site investigations and research associated with the disposal of high-level radioactive waste, the paleogroundwater in deep boreholes have been employed in order to characterize groundwater flow in the fractured bedrock at Jijicao preselected site. By obtaining the deep groundwater samples from deep borehole, this study focused on krypton isotope data, the groundwater mixing and relationship were analyzed, and the paleogroundwater dating results were corrected. It found that the age of deep groundwater is 25ka and 46ka, the characteristics of slow groundwater circulation rate and long residence time are conductive to the safe disposal of high-level radioactive waste.