Final report on the surface-based investigation (phase I) at the Mizunami Underground Laboratory project

Saegusa, Hiromitsu; Seno, Yasuhiro; Nakama, Shigeo ; Tsuruta, Tadahiko  ; Iwatsuki, Teruki  ; Amano, Kenji  ; Takeuchi, Ryuji  ; Matsuoka, Toshiyuki; Onoe, Hironori ; Mizuno, Takashi   ; Oyama, Takuya ; Hama, Katsuhiro ; Sato, Toshinori  ; Kuji, Masayoshi; Kuroda, Hidetaka; Semba, Takeshi ; Uchida, Masahiro; Sugihara, Kozo; Sakamaki, Masanori

The Mizunami Underground Laboratory (MIU) Project is a comprehensive research project investigating the deep underground environment within crystalline rock being conducted by Japan Atomic Energy Agency at Mizunami City in Gifu Prefecture, central Japan. This report summarizes the results of the Surface-based Investigation Phase, identifies future issues and provides direction for research to be conducted during Construction Phase and Operation Phase. The results compiled in this report will be utilized for the technical knowledge base on geological disposal of HLW, and can be used to enhance the technical basis for waste disposal in general and for development of government regulations.