Groundwater pressure records by geochemical monitoring system in the Horonobe Underground Research Laboratory (FY 2019-2021)

Dei, Shuntaro  

Japan Atomic Energy Agency had been conducting "geoscientific study" and "research and development on geological disposal" in the Horonobe Underground Research Laboratory (URL) for safe geological disposal of high-level radioactive waste. In the Horonobe underground research project for FY 2020 and subsequent years, the pressure and water quality of groundwater have been continuously monitored using monitoring systems in order to obtain the data necessary for conducting the remaining important issues. This report presents groundwater pressure which have been obtained from April 2019 to March 2022 by the monitoring systems installed at the 140 m and 350 m gallery.