Abstract
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.
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