Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Sugita, Nobutaka*; Nakajima, Masayuki*; Nakamura, Toshiaki*
JNC TJ7450 2004-002, 698 Pages, 2004/03
JNC-TJ7450-2004-002.pdf:168.94MB
The research is carry out as part of Phase I (Surface-based Investigation Phase) in MIU (Mizunami Underground Research Laboratory) Project located on the MIU construction site in Mizunami City, Gihu Prefecture. The purpose of this research is to investigate the Physical property of rock in depyh from surface to the of 500m. Physical and mechanical properties of Mizunami Group and Toki granite have been obtained in our laboratory by using the core obtained from MIZ-1 bore hole.
Takano, Hitoshi*; Kimura, Hitoshi*
JNC TJ7440 2005-090, 210 Pages, 2004/03
JNC-TJ7440-2005-090.PDF:8.35MB
no abstracts in English
Takano, Hitoshi*; Kimura, Hitoshi*
JNC TJ7440 2005-089, 35 Pages, 2004/03
JNC-TJ7440-2005-089.PDF:1.02MB
no abstracts in English
Hosoya, Shinichi*
JNC TJ7440 2005-066, 80 Pages, 2004/03
JNC-TJ7440-2005-066.PDF:2.29MB
no abstracts in English
Futakuchi, Katsuhito*; Hiroki, Minenari*; Sakuramoto, Yuji*
JNC TJ8400 2004-010, 33 Pages, 2004/02
JNC-TJ8400-2004-010.pdf:7.57MB
The alteration characteristics of volcanic glass in geological medium are investigated as natural analogues of geological disposal of high-level radioactive wastes. This study leads to the following conclusion. The activation energy was calculated for changes from volcanic glasses to clinoptilolite is 176.27KJ/mol.
Maemura, Tsuneyuki*
JNC TJ7430 2005-008, 124 Pages, 2004/02
JNC-TJ7430-2005-008.pdf:19.87MB
no abstracts in English
Hasegawa, Osanu*; Takano, Hitoshi*
JNC TJ6420 2004-001, 50 Pages, 2004/02
JNC-TJ6420-2004-001.pdf:1.61MB
In order to evaluate the possibility of slope failure and landsliding, aerial photograph interpretation has been carried out around mill tailing and waste rock yards.Almost of small-scale slope failure features are recognized in steep slope area (over 20
dip), in which Cretaceous granitic rocks and Tertiary volcanic rocks are distributed. Furthermore small-scale slope failure features are also recognized in artificially deforested area. Therefore it seems that many factors are related to occurrence of slope failure.Landslide features are recognized at 2 localities in the distribution of Tertiary stratified volcanic rocks. The landslide may be closely related to the geological setting. In addition, these slope failure and landslide topographic features have no relation to lineament or active fault. Mill tailing and waste rock yards are especially located in gently slope area (under 20 dip). It is suggested that these yards are topographically on stable landform. Although, there exist steep gradient slopes (over 20 dip) at upward of Choja and Kannokura waste rock yards. And slope failure features are recognized around these yards. Therefore it may be inferred that slope failure will take place there.
Tsuchiya, Terumitsu*; Narita, Norifumi*; Tani, Kazuyuki*
JNC TJ7400 2005-022, 45 Pages, 2004/01
no abstracts in English
Tsuchiya, Terumitsu*; Narita, Norifumi*
JNC TJ7440 2005-059, 151 Pages, 2003/03
JNC-TJ7440-2005-059.PDF:30.48MB
no abstracts in English
Wakahama, Hiroshi*; Nakata, Mitsuhiko*; Hiroki, Minenari*; Futakuchi, Katsuhito*; Okada, Akio*
JNC TJ7440 2003-004, 128 Pages, 2003/03
JNC-TJ7440-2003-004.pdf:15.57MB
This report describes the results of installation of the long-term groundwater monitoring system into borehole DH-2 as a part of the Regional Hydrogeological Study and Mizunami Underground Research Laboratory Project. DH-2 was driglled with 100mm diameter through Toki-granite to the depth of 501meter below the ground level, in which 5inch-steel-casing pipe was inserted to the depth of 171m. The monitoring system was composed of concentrically arranged seven open PVC(polyvinyl chloride)-stand-pipes("Piezo-pipes"), housed within outer 4inch PVC-casings, followed by 3inch PVC-casings, packers and several stainless steel units. In the system, seven monitoring zones were isolated by expandable rubber type packers inflating with water. From the view point of quality assessment, leak-off tests were conducted for all of 7 packers before the shipment and the installation at the site. In terms of individual casing joints, air-tight inspections were carried out ...
Takano, Hitoshi*; Sugimoto, Yoshihiro*; Yamashita, Tadashi*; Yamada, Naoyuki*
JNC TJ6420 2003-011, 127 Pages, 2003/02
JNC-TJ6420-2003-011.pdf:4.56MB
Drilling and high resolution electrical survey was carried out to make a geological structure model around mill tailing yard. Following by drill investigation, Distribution of the granite which became fragility was confirmed by the development of fractures with hydrothermal vein. However, fresh bedrock is distributed deeper than 40m. Permeability of weathering granite is about in 1.15
10
m/sec. The value agrees previous findings. In fresh granite, permeability is 4.3310
m/sec, and it value is larger than existing data. It is for developing of fractures in fresh granite. At high resolution electrical survey, analysis is done by 3 dimensions. By analyzing it with 3 dimensions, good resistivity distribution was provided. From resistivity distribution, tailing, weathered granite or sedimentary rock and fresh granite are classified. Resistivity distribution was taken out from lines or seismic exploration refraction method, and compared between two methods. As a result, low resistivity region is fitted low velocity zone and high resistivity region is fitted high velocity zone. Topography and 4 geological models are created. These models are output as versatile text data to show relation of a coordinate and the point of contact.
Futakuchi, Katsuhito*; Sakuramoto, Yuji*; Hiroki, Minenari*
JNC TJ8400 2003-006, 50 Pages, 2003/01
JNC-TJ8400-2003-006.pdf:10.85MB
The alteration characteristics of volcanic glass and bentonite in geological medium are investigated as natural analogues of geological disposal of high-level radioactive wastes. For the study of alterlation of volcanic glass, literature survey, petrographical observation by using optical microscope, chemical analysis of pore water and groundwater, and microbiostratigraphical study were carried out. The volcanic ashes were collected from a borehole, which had been drilled in the Kanto region by the National Research Institute for Earth Science and Disaster Prevention. The volcanic glass was wholly altered in thin sections. Chemical analysis of pore water indicate the chloride-rich composition. And chemical analysis of groundwater, which are pumped up near the studied borehole, indicate the mixing product of connate marine water and fresh groundwater. Fossil evidence suggests that the studied volcanic glass is 3.65
4.2Ma. in age, and is correlated with upper Miura Group. This study leads to the following conclusion. The volcanic glass, under the temperature condition 70C, was wholly altered to montomorillonite and clinoptilolite. This case must be occurred in the connate marine water at last 0.5 Ma..
*; *
JNC TJ7420 2002-002, 67 Pages, 2002/03
JNC-TJ7420-2002-002.pdf:6.12MB
no abstracts in English
Futakuchi, Katsuhito*; Sakuramoto, Yuji*; Hiroki, Minenari*
JNC TJ8400 2001-046, 61 Pages, 2002/02
JNC-TJ8400-2001-046.pdf:2.45MB
The alteration characteristics of volcanic glass and bentonite in geological medium are investigated as natural analogues of geological disposal of high-level radioactive wastes. For the study of volcanic glass, volcanic ashes are collected from boreholes, which were drilled in the Kanto region by the National Research Institute for Earth Science and Disaster Prevention. The volcanic glass, under the temperature condition 70C, was altered to montomorillonite and clinoptilolite, but another volcanic glass, under the temperature condition up to 50C, was not altered. Both cases may be occurred in the connate marine water at last 0.5 Ma For the study of bentonite, slight alkaline hot spring water (pH: up to 9) and rocks in Rausu area, Hokkaido Prefecture, have been studied to examine the zeolitization of montmorillonite. X-ray diffraction analysis show that montmorillonite, kaolinite, mordenite, and alunite were recognized as the alteration minerals. Alkaline (pH:up to 9) and high temperature (about 90C) water (Na
- Cl
type) were found at several outcrops, chemical and isotopic analysis show that those alkali hot spring waters were meteoric origin, increasing of salinity were as a result of seepage through the marine sedimentary strata, and high temperature was derived from the heat source. Stability relationship for system anorthite - kaolinite - montmorillonite - silica minerals - aqueous solution shows that montmorillonite was stable in those spring water.
Maemura, Tsuneyuki*; Hosono, Takayasu*
JNC TJ7400 2001-014, 169 Pages, 2002/02
JNC-TJ7400-2001-014.pdf:5.35MB
no abstracts in English
Maemura, Tsuneyuki*; Tokumaru, Masanori*
JNC TJ7400 2001-001, 108 Pages, 2001/02
JNC-TJ7400-2001-001.pdf:3.03MB
no abstracts in English
*; Hashii, Tomoki*; *; *; *; Sugita, Nobutaka*; *
JNC TJ7440 2000-022, 1478 Pages, 2000/02
JNC-TJ7440-2000-022-1.pdf:220.51MBJNC-TJ7440-2000-022-2.pdf:436.34MB
no abstracts in English
Nishida, Kaoru*; Maemura, Tsuneyuki*
JNC TJ7400 2000-004, 102 Pages, 2000/02
JNC-TJ7400-2000-004.pdf:5.64MB
no abstracts in English
Futakuchi, Katsuhito*; *; *; *; Hashimoto, Shuji*
JNC TJ8400 99-044, 72 Pages, 1999/02
The alteration characteristics of volcanic glass and bentonite and immobility of iodine in geological medium are investigated as a part of the natural analogue study of geological disposal of high-level radioactive waste. For the study of volcanic glass, volcanic ashes (08) are collected at Kamogawa area in Chiba Prefecture which ejected Pleistocene (ca. 1.0 Ma.) to examine the hydration in underground condition. Optical analysis, espetially reflaction index measurement show that volcanic ashes (08) were wholly hydrated. For the study of bentonite, marine argillaceous rocks in Nishikubiki area, Niigata Prefecture have been studied to determine the thermal history of this area. In order to estimate the temperature on contact of inturusive body and argillaceous rocks, measurement of homoginized temperature of fluid inclusion and observation under the optical microscope. For the study of iodine immobility in geological medium, iodine-bearing groundwater in Mobara Gas field, Chiba Prefecture, were discussed.