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JAEA Reports

Results of pilot borehole investigation in -500m access/research gallery-north (12MI27 and 12MI33 boreholes)

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

JAEA-Technology-2013-044.pdf:11.09MB
JAEA-Technology-2013-044-appendix(CD-ROM).zip:316.8MB

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.

Journal Articles

Development of Melt Refining Decontamination Technology for Low Level Radioactive Metal Waste Contaminated with Uranium

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

Journal Articles

Steam Reforming: Alternative Pyrolytic Technology to Incineration for Volume Reduction and Stabilization of Low-Level Radioactive Organic Liquid Wastes

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

Oral presentation

Current status of the construction work of Mizunami Underground Research Laboratory

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.

Oral presentation

Current status of the construction work of Mizunami Underground Research Laboratory

Suto, Masahiro; Mikake, Shinichiro; Ikeda, Koki; Yamamoto, Masaru

no journal, , 

no abstracts in English

Oral presentation

Mizunami Underground Research Laboratory Project; Closure experiment at -500 m access gallery

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.

Oral presentation

Current status of the construction work of Mizunami Underground Research Laboratory

Suto, Masahiro; Mikake, Shinichiro; Ikeda, Koki; Yamawaki, Hiroyuki

no journal, , 

no abstracts in English

Oral presentation

Research and development on radiation measurement and protection

Uchida, Masahiro; Tsuchiko, Yasuhiro*; Suto, Yudai*; Hoshi, Katsuya

no journal, , 

no abstracts in English

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