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Tsuyuguchi, Koji; Kuroiwa, Hiroshi; Kawamoto, Koji; Yamada, Nobuto; Onuki, Kenji; Iwatsuki, Teruki; Takeuchi, Ryuji; Ogata, Nobuhisa; Suto, Masahiro; Mikake, Shinichiro
JAEA-Technology 2013-044, 89 Pages, 2014/02
This document summarizes the data of pilot boreholes (12MI27, 12MI33) in the -500m Access/Research Gallery-North. The geological, hydraulic and geochemical data were obtained. In addition, groundwater monitoring system was installed in closure test gallery for the flooding test in phase III research. The results of investigation, biotite granite with medium to coarse-grained equigranular texture are characterized. Rock mass classification is B from CH class. Minor fault with fault gouge that was not presumed by an original model are observed in 12MI33. Density of fracture in 12MI27 near the Main-shaft fault tends to be compared to 12MI33. Water inflow in both boreholes is less. Permeability ranges from 4.8E-10 to 6.1E-09m/sec at the zone without alteration and with low inflow, from 1.1E-07 to 2.7E-07m/sec at the zone without alteration and with high inflow, respectively. Groundwater chemistry is rich in Na and Cl ion.
Sudo, Makoto; Miyamoto, Yasuaki; Fukumoto, Masahiro; Suto, Osamu
Journal of Physics and Chemistry of Solids, 66(2-4), p.608 - 611, 2005/00
Times Cited Count:6 Percentile:30.15(Chemistry, Multidisciplinary)None
Takai, Masakazu; Sudo, Makoto; Nakazawa, Osamu; Fukumoto, Masahiro; Suto, Osamu
Journal of Physics and Chemistry of Solids, 66, p.694 - 696, 2004/00
Times Cited Count:6 Percentile:30.15(Chemistry, Multidisciplinary)None
Suto, Masahiro; Mikake, Shinichiro; Ikeda, Koki; Yamamoto, Masaru
no journal, ,
Japan Atomic Energy Agency (JAEA)'s task is to provide the scientific and technical basis for safe geological disposal of high-level radioactive waste. This involves researches on development and improvement of techniques for characterization of the deep geological environment and a wide range of engineering for deep underground application in crystalline rock at "Mizunami Underground Research Laboratory (MIU)". MIU is currently being constructed. The Main and Ventilation Shafts had reached GL-500m. This report describes the current status of the construction Work.
Suto, Masahiro; Mikake, Shinichiro; Ikeda, Koki; Yamamoto, Masaru
no journal, ,
no abstracts in English
Iwatsuki, Teruki; Sato, Toshinori; Takeuchi, Ryuji; Onoe, Hironori; Onuki, Kenji; Saegusa, Hiromitsu; Hasegawa, Takashi; Kuroiwa, Hiroshi; Tsuyuguchi, Koji; Ikeda, Koki; et al.
no journal, ,
Closure experiment of gallery of MIU is planned to understand the recovery process of geological environments after the closure. Flooding test gallery and monitoring boreholes are designed at 500 m access gallery to observe recovery of water pressure, chemistry around cement and burial materials, rock stress. Evaluation of numerical analysis methods on hydraulic, chemical and mechanical change will be conducted based on the results of upcoming closure experiment.
Suto, Masahiro; Mikake, Shinichiro; Ikeda, Koki; Yamawaki, Hiroyuki
no journal, ,
no abstracts in English
Uchida, Masahiro; Tsuchiko, Yasuhiro*; Suto, Yudai*; Hoshi, Katsuya
no journal, ,
no abstracts in English