Modeling study on geological environment at Horonobe URL site

Shimo, Michito*; Yamamoto, Hajime*; Kumamoto, So*; Fujiwara, Yasushi*; Ono, Makoto*

The Horonobe underground research project has been carried out by Japan Nuclear Cycle Development Institute to study the geological environment of sedimentary rocks in deep underground. The objectives of this study are to develop a geological environment model, which incorporate current findings and latest data obtained through the geological, geophysical, and borehole investigations at Horonobe site, and to predict the hydrological and geochemical impacts caused by the URL shaft excavation to the surrounding area.