Technical development on the ³H-³He method dating the age of groundwater

Abstract

Some geohydrologic investigations before disposing of radiowastes into underground facilities are necessary, because the safety assessment should be required assuming that hazardous radionuclides might be released into geoenvironments from the radioactive contaminated materials. The flow velocity of groundwater, the recharged origin and the basin have to be determined through in-si tu observations. In this study, the ³H-³He dating method has been researched and developed in some technical points to estimate the age of groundwater. This method was preliminarly applied to the confined aquifer in Mishima la-va flow to estimate the groundwater flow velocity and reasonable results compared with past some investigations were drawn.