Mizunami Underground Research Laboratory Project, Annual report for fiscal year 2018

Takeuchi, Ryuji  ; Iwatsuki, Teruki  ; Matsui, Hiroya ; Nohara, Tsuyoshi   ; Onoe, Hironori ; Ikeda, Koki; Mikake, Shinichiro ; Hama, Katsuhiro ; Iyatomi, Yosuke ; Sasao, Eiji   

The Mizunami Underground Research Laboratory (MIU) Project is being pursued by the Japan Atomic Energy Agency (JAEA) to enhance the reliability of geological disposal technologies through investigations of the deep geological environment in the crystalline rock (granite) at Mizunami City, Gifu Prefecture, central Japan. On the occasion of JAEA reformation in 2014, JAEA identified three remaining important issues on the geoscientific research program based on the synthesized latest results of research and development (R&D): "Development of countermeasure technologies for reducing groundwater inflow", "Development of modeling technologies for mass transport" and "Development of drift backfilling technologies". The R&D on three remaining important issues have been carrying out in the MIU Project. In this report, the current status of R&D and construction activities of the MIU Project in fiscal year 2018 is summarized.