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Takeuchi, Shinji*; Sawada, Atsushi; Takeuchi, Ryuji; Daimaru, Shuji*; Toya, Naruhisa*
Dai-13-Kai Iwa No Rikigaku Kokunai Shimpojiumu Koen Rombunshu (CD-ROM), p.143 - 148, 2013/01
Transformation of transmissivity from derivative of pressure traisnet data obtained from hydraulic packer testing has applied to the testing data from fractured rock of Mizunami site Japan and Onkalo site Finland. The results show hydrogeological conceptual model for the tested area such as connectivity and continuity of the water-conducting features could be established by the proposed methodology. This method would provide useful information to the hydrogeologial and transport modeling and simulation.
Daimaru, Shuji; Takeuchi, Ryuji; Onoe, Hironori; Saegusa, Hiromitsu
JAEA-Data/Code 2012-020, 44 Pages, 2012/09
This report summarize the results of the single borehole hydraulic tests of 79 sections conducted as part of the Construction phase (Phase 2) in the Mizunami Underground Research Laboratory (MIU) Project. The details of each test (test interval depth, geology, etc.) as well as the interpreted hydraulic parameters and analytical method used are presented in this report.
Kunimaru, Takanori; Mikake, Shinichiro; Nishio, Kazuhisa; Tsuruta, Tadahiko; Matsuoka, Toshiyuki; Ishibashi, Masayuki; Ueno, Takashi; Tokuyasu, Shingo; Daimaru, Shuji; Takeuchi, Ryuji; et al.
JAEA-Review 2012-020, 178 Pages, 2012/06
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 technological 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 II. And Phase III started in 2010 fiscal year. This report shows the results of the investigation, construction and collaboration studies in fiscal year 2010, as a part of the Phase II based on the MIU Master Plan updated in 2002.
Daimaru, Shuji; Onoe, Hironori; Takeuchi, Ryuji
JAEA-Research 2012-008, 70 Pages, 2012/06
JAEA is performing the Mizunami Underground Research Laboratory (MIU) project. Currently, the project is under Phase II and Phase III. As part of Phase II, the borehole investigation (10MI22, 10MI23) was conducted at 100m Measurement Niche in -300m Access/Research Gallery in 2010. As a result of long-term pumping test, completely different pressures due to the pumping test were observed in monitoring boreholes on opposite sides of the Main-shaft fault. This observation indicates that the normal direction of the Main-shaft fault is low permeable. And, the Main-shaft fault acts as a flow barrier normal to the fault plane. As a result of hydraulic test, permeability of fracture zone with accompanying host rock zone was from 9.4E-7m/s to 3.8E-11m/s. And, this zone was classified as two sections, permeability of the section is same as the upper highly fractured domain (UHFD :1.0E-7m/s) and the section of its permeability is 4 order lower than UHFD.
Tsuruta, Tadahiko; Takeda, Masaki; Ueno, Takashi; Daimaru, Shuji; Tokuyasu, Shingo; Onoe, Hironori; Shingu, Shinya; Ishibashi, Masayuki; Takeuchi, Ryuji; Matsuoka, Toshiyuki; et al.
JAEA-Technology 2012-001, 134 Pages, 2012/03
Tono Geoscientific Research Unit of Japan Atomic Energy Agency (JAEA) is performing the Mizunami Underground Research Laboratory (MIU) project in order to establish comprehensive techniques for the investigation, analysis and assessment of the deep geological environment in fractured crystalline rock. The borehole investigations (two boreholes; 10MI22 borehole and 10MI23 borehole) have been carried out to obtain information on geological, hydrological and hydrochemical characteristics in and around the Main-shaft fault. These investigations provided that features of fracture and alteration on rock mass in and around the Main-shaft fault. Hydrological and hydrochemical properties based on the geological features were also obtained.
Takeuchi, Shinji; Takeuchi, Ryuji; Toya, Naruhisa*; Daimaru, Shuji
Proceedings of International Conference on Toward and Over the Fukushima Daiichi Accident (GLOBAL 2011) (CD-ROM), 8 Pages, 2011/12
Onoe, Hironori; Takeuchi, Ryuji; Saegusa, Hiromitsu; Daimaru, Shuji; Karino, Tomoyuki
Proceedings of 19th International Conference on Nuclear Engineering (ICONE-19) (CD-ROM), 9 Pages, 2011/10
Sanada, Hiroyuki; Sugita, Yutaka; Daimaru, Shuji; Matsui, Hiroya; Kashiwai, Yoshio*
Journal of MMIJ, 126(10,11), p.569 - 576, 2010/10
When the structures such as rock slopes, underground caverns for the geological disposal of high level radioactive waste and underground power plants are constructed, the potential for displacement and damage in the surrounding rock mass is increased due to stress concentration and creep phenomenon. Therefore, the long-term monitoring of rock stability for construction of rock cavern and slopes is important to maintain stability of rock structures. Recently, development of sensors that use optical fiber have expanded mainly in the field of civil engineering and, in rock and soil mechanics, since several parameters such as temperature, strain, pressure, pH etc. can be obtained by using backscattered light in optical fibers. Additionally, some important advantages using optical fiber are its high resistance to the electric insulation failure, long-term endurance and ability to transmit data over long distances. This paper describes development of a multiple-type displacement sensor using FBG, which has potential for the long-term durability and high accuracy. Laboratory tests were carried out to investigate the relational expression computed from the relationship of the variation in the Bragg wavelength, temperature and displacement. Accuracy of the prototype developed in this research is better than 0.5% or 1/100 mm. The in situ tests involving long-term monitoring using boreholes were conducted to confirm the workability and applicability of the prototype. From the results of the in situ tests, workability is equivalent to the extensometers usually used for long-term monitoring, and the displacement computed from the variation of Bragg wavelength is almost equal to the artificially induced deformation.
Daimaru, Shuji; Takeuchi, Ryuji; Takeda, Masaki; Ishibashi, Masayuki
Proceedings of 13th International Conference on Environmental Remediation and Radioactive Waste Management (ICEM 2010) (CD-ROM), p.149 - 158, 2010/10
no abstracts in English
Takeuchi, Ryuji; Saegusa, Hiromitsu; Oyama, Takuya; Keya, Hiromichi; Sato, Atsuya; Kosaka, Hiroshi; Takeda, Masaki; Daimaru, Shuji; Takeuchi, Shinji
JAEA-Research 2010-018, 133 Pages, 2010/08
The Mizunami Underground Laboratory Project is a comprehensive research project investigating the deep underground environment within crystalline rock. The project goals of the project from surface-based investigation phase (Phase I) through to operation phase (Phase III) are: to establish techniques for investigation, analysis and assessment of the deep geological environment, and to develop a range of engineering for deep underground application. Currently, the project is under the construction phase (Phase II). One of the Phase II goals, which is for the project goal, was set to develop and revise models of the geological environment using the investigation results obtained during excavation, and determine and assess changes in the geological environment in response to excavation. This document presents the overview of results of the research and development on "hydrogeology" performed in fiscal year 2008, with regard to the Phase II goal.
Kashiwai, Yoshio*; Daimaru, Shuji*; Sanada, Hiroyuki; Matsui, Hiroya
JAEA-Technology 2008-047, 77 Pages, 2009/07
This work was performed by Taisei Kiso Sekkei Co., Ltd. under contract with Japan Atomic Energy Agency. The objective of this work is development of multiple stage optical fiber displacement sensors for the long-term deformation monitoring in rock mass of shafts and horizontal tunnels at the Phase 2 of Horonobe Underground Research project. The field test was done for installation to the borehole drilling in bedrock and continuous observation of one month. A prototype of explosion-proof fusion splice was also made for setting work in the flammable circumstance.
Hirata, Yoichi*; Daimaru, Shuji*
JNC TJ7410 2005-008, 28 Pages, 2004/03
We examined this hydraulic pressure gauge under the conditions that was not proved yet, and improved the measurement house and the method to get data.
Onoe, Hironori; Takeuchi, Ryuji; Saegusa, Hiromitsu; Takeda, Masaki; Kosaka, Hiroshi; Daimaru, Shuji; Karino, Tomoyuki
no journal, ,
In this paper, a part of the result of long-term monitoring, hydrogeological modeling and groundwater flow simulation in Phase 2 of MIU project were introduced. And, methodology of model calibration based on the data of hydraulic impacts in Phase 2 was summarized.
Takeuchi, Ryuji; Saegusa, Hiromitsu; Oyama, Takuya; Kosaka, Hiroshi; Sato, Atsuya; Keya, Hiromichi; Daimaru, Shuji; Takeda, Masaki
no journal, ,
no abstracts in English
Onoe, Hironori; Takeuchi, Ryuji; Takeda, Masaki; Daimaru, Shuji; Karino, Tomoyuki; Tsuyuguchi, Koji
no journal, ,
In this paper, a part of the result of long-term monitoring, hydrogeological modeling and groundwater flow simulation in Phase 2 of MIU project were introduced. And, applicability of model calibration methodology based on the data of hydraulic impacts in Phase 2 was confirmed by groundwater flow modeling using Phase 2 data.
Onoe, Hironori; Daimaru, Shuji*; Onuki, Kenji; Karino, Tomoyuki; Takeuchi, Ryuji
no journal, ,
The Mizunami Underground Research Laboratory (MIU) is now under construction by the Japan Atomic Energy Agency, in the Cretaceous Toki granite in the Tono area, Central Japan. In Phase II of the MIU Project, hydrogeological investigations and long-term groundwater pressure monitoring are to be carried out in order to confirm adequacy of the groundwater flow conceptual model constructed in Phase I. In this paper, adequacy of the groundwater flow conceptual model is confirmed using groundwater flow simulation based on data from pumping test was carried out from the -300 m Access/Research Gallery.
Takeuchi, Ryuji; Takeda, Masaki; Ueno, Takashi; Daimaru, Shuji; Tokuyasu, Shingo; Onoe, Hironori; Shingu, Shinya; Ishibashi, Masayuki; Matsuoka, Toshiyuki; Mizuno, Takashi; et al.
no journal, ,
no abstracts in English
Sanada, Hiroyuki; Sugita, Yutaka; Daimaru, Shuji; Matsui, Hiroya; Kashiwai, Yoshio*
no journal, ,
no abstracts in English
Kashiwai, Yoshio*; Daimaru, Shuji*; Sanada, Hiroyuki; Matsui, Hiroya
no journal, ,
Onuki, Kenji; Daimaru, Shuji*; Onoe, Hironori; Takeuchi, Ryuji
no journal, ,
The Mizunami Underground Research Laboratory (MIU) is now under construction by the Japan Atomic Energy Agency, in the Cretaceous Toki granite in the Tono area, Central Japan. In Phase I and Phase II of the MIU Project, distribution of low permeable fault was confirmed in the MIU construction site. And it was estimated that the fault is significant structure for groundwater flow condition around the MIU construction site. In this paper, hydrogeological characteristics of the fault are evaluated based on data from hydraulic packer test was carried out from the -300 m Access/Research Gallery.
Toya, Naruhisa*; Takeuchi, Ryuji; Takeuchi, Shinji; Daimaru, Shuji; Nakano, Katsushi*; Kikuyama, Seiji*
no journal, ,
no abstracts in English