Mizunami Underground Research Laboratory Project, Annual report for fiscal year 2014

Hama, Katsuhiro ; Mikake, Shinichiro ; Ishibashi, Masayuki; Sasao, Eiji   ; Kuwabara, Kazumichi; Ueno, Tetsuro; Onuki, Kenji*; Beppu, Shinji; Onoe, Hironori ; Takeuchi, Ryuji  ; Saegusa, Hiromitsu; Munemoto, Takashi; Kato, Toshihiro; Iwatsuki, Teruki  ; Iwasaki, Riyo; Ikeda, Koki; Sato, Toshinori  ; Osawa, Hideaki  ; Koide, Kaoru

Japan Atomic Energy Agency (JAEA) at Tono Geoscience Center (TGC) is pursuing a geoscientific research and development project namely the Mizunami Underground Research Laboratory (MIU) Project in crystalline rock environment in order to construct scientific and technical basis for geological disposal of High-level Radioactive Waste (HLW). The MIU Project has three overlapping phases: Surface-based Investigation phase (Phase I), Construction phase (Phase II), and Operation phase (Phase III). The MIU Project has been ongoing the Phase III, as the Phase II was concluded for a moment with the completion of the excavation of horizontal tunnels at GL-500m level in February 2014. This report presents the results of the investigations, construction and collaboration studies in fiscal year 2014.