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Yokota, Hideharu; Tomura, Goji; Maekawa, Keisuke
Proceedings of 3rd International Workshop and Conference on Earth Resources Technology 2009 (CD-ROM), p.169 - 178, 2009/12
Japan Atomic Energy Agency has been carrying out Horonobe Underground Research Laboratory Project for understanding of characteristics of the geological environment as a part of research and development programs on geological disposal of high-level radioactive waste. As developing techniques for long-term monitoring of geological environment, we have been measuring the groundwater pressure using boreholes in order to monitor any influences due to the construction of the underground facilities. The results from examination of relations with the data of the long-term monitoring of groundwater pressure, geological characteristics obtained from the drilling cores, logging data and hydraulic characteristics of the boreholes suggest the existing of the continuative hydrogeological structure at the neighborhood of a feature geological boundary, and that the distribution of continuative hydrogeological structures around the underground facilities depends on the geological characteristics not the depth from ground level.
Iwatsuki, Teruki; Sato, Haruo; Tanai, Kenji; Inagaki, Manabu; Sawada, Atsushi; Niinuma, Hiroaki; Ishii, Eiichi; Maekawa, Keisuke; Tomura, Goji; Sanada, Hiroyuki; et al.
JAEA-Research 2009-002, 156 Pages, 2009/05
JAEA-Research-2009-002.pdf:12.86MB
The research and development plan for geological investigation, engineering technology and safety assessment during the drilling of a shaft down to intermediate depth are summarized according to the Midterm Plan till 2009 Fiscal year of JAEA. This report describes subject, current status and programme in the "Phase 2: Construction phase" (investigations during construction of the underground facilities). Furthermore regarding R&D plan in next Midterm Plan of JAEA, preliminary ideas are summarized.
Kurikami, Hiroshi; Takeuchi, Ryuji; Yabuuchi, Satoshi; Seno, Shoji*; Tomura, Goji; Shibano, Kazunori; Hara, Minoru; Kunimaru, Takanori
Doboku Gakkai Rombunshu, C, 64(3), p.680 - 695, 2008/09
Japan Atomic Energy Agency has been conducting the Horonobe Underground Research Laboratory (URL) project in Horonobe, Hokkaido, as a part of the research and development program on geological disposal of high-level radioactive waste. This paper shows the results of hydrogeological investigations in the surface-based investigation phase of the project. Hydrological and meteorological investigations show that the infiltration rates of the drainage basins varies and that the infiltration rate depends on the flora and the topography. The hydraulic tests using the deep boreholes reveals that hydraulic conductivity of the scale of a few decameters to a hundred meter varies widely and decreases with depth in the same formation, while the laboratory hydraulic tests suggest that hydraulic conductivity of the intact rock is influenced by the stress history. The hydraulic tests and the long-term monitorings of hydraulic pressure clarify relatively high pressure in the deep underground. Furthermore, groundwater flow analysis shows that the groundwater in and around the URL area flows regionally from the east to the west and depends locally on the geography and geology.
Tomura, Goji; Kurikami, Hiroshi; Shibano, Kazunori; Kunimaru, Takanori; Hara, Minoru
JAEA-Research 2007-063, 46 Pages, 2007/11
JAEA-Research-2007-063.pdf:8.1MB
Horonobe Underground Research Center of Japan Atomic Energy Agency has been investigating surface hydrogeological features in and around the Horonobe Underground Research Laboratory (URL) area as a part of Horonobe URL project. In the surface hydrogeological investigation, for the purpose of understanding of groundwater recharge rate and groundwater flow in the shallower part, which are required for the setting of boundary and initial condition of the groundwater flow analysis, meteorological observations, observation of river flux and water quality, soil moisture observation, groundwater level observation, etc are being continued. This report shows present status and results of surface hydrogeological investigation in the Horonobe URL project.
Kunimaru, Takanori; Shibano, Kazunori; Kurikami, Hiroshi; Tomura, Goji; Hara, Minoru; Yamamoto, Hajime*
JAEA-Data/Code 2007-015, 113 Pages, 2007/11
JAEA-Data-Code-2007-015.pdf:6.62MB
In the Horonobe Underground Research Laboratory (URL) Project, ground water from boreholes, river water and precipitation have been preiodically analyzed for the environmental monitoring since the fiscal year 2001. This report shows the data set of water chemistry since the fiscal year 2001 to the fiscal year 2006.
Ota, Kunio; Abe, Hironobu; Yamaguchi, Takehiro; Kunimaru, Takanori; Ishii, Eiichi; Kurikami, Hiroshi; Tomura, Goji; Shibano, Kazunori; Hama, Katsuhiro; Matsui, Hiroya; et al.
JAEA-Research 2007-044, 434 Pages, 2007/03
JAEA-Research-2007-044.pdf:54.58MBJAEA-Research-2007-044(errata).pdf:0.08MB
The Horonobe URL Project started in 2000. Research and development activities are planned over three phases, that will span a total duration of about 20 years: the 1st surface-based investigarion phase (6 years), the 2nd URL construction phase (8 years) and rhe 3rd operation phase (12 years). Geological, geophysical, geo-mechanical, hydrogeological, and hydro-geochemical investigations have been carried out during the surface-based investigation.
Tomura, Goji; Maekawa, Keisuke; Kurikami, Hiroshi; Shibano, Kazunori; Kunimaru, Takanori; Hara, Minoru
no journal, ,
no abstracts in English
Maekawa, Keisuke; Kawamura, Makoto; Kato, Tomoko; Tomura, Goji; Inagaki, Manabu
no journal, ,
no abstracts in English
Tomura, Goji; Maekawa, Keisuke; Yokota, Hideharu
no journal, ,
Horonobe Underground Research Center of Japan Atomic Energy Agency has carried out investigated surface hydrogeological investigation in and around the Horonobe Underground Research Laboratory (URL) area as a part of Horonobe URL project. We continue meteorological observation, observation of river flux and water quality, soil moisture observation and groundwater level observation in order to understand recharge rate and groundwater flow in the shallow part, which are required for the setting of boundary and initial condition of the groundwater flow analysis. This report show current status and results of surface hydrogeological investigation in the Horonobe URL project.
Maekawa, Keisuke; Tomura, Goji; Yokota, Hideharu
no journal, ,
no abstracts in English
Sanada, Hiroyuki; Hanakawa, Toshiyuki; Ota, Kunio; Abe, Hironobu; Yamaguchi, Takehiro; Kunimaru, Takanori; Ishii, Eiichi; Kurikami, Hiroshi; Tomura, Goji; Shibano, Kazunori; et al.
no journal, ,
no abstracts in English
Kunimaru, Takanori; Ota, Kunio; Abe, Hironobu; Yamaguchi, Takehiro; Ishii, Eiichi; Kurikami, Hiroshi; Tomura, Goji; Shibano, Kazunori; Hama, Katsuhiro; Matsui, Hiroya; et al.
no journal, ,
The Horonobe Underground Research Laboratory (URL) Project is being pursued by the Japan Atomic Energy Agency (JAEA) to enhance the reliability of relevant disposal technologies through investigations of the deep geological environment within the host sedimentary formations at Horonobe, northern Hokkaido. The project consists of two major research areas, "Geoscientific Research" and "R&D on Geological Disposal", and proceeds in three overlapping phases, "Phase I: Surface-based investigation", "Phase II: Construction" and "Phase III: Operation", over a period of 20 years. The present report summarises the results of the Phase I geoscientific research carried out from March 2001 to March 2005. Integration of work from different disciplines into a "geosynthesis" ensures that the Phase I goals have been successfully achieved and identifies key issues that need to be addressed in the Phase II/III investigations.
Yokota, Hideharu; Yabuuchi, Satoshi; Tomura, Goji; Maekawa, Keisuke
no journal, ,
no abstracts in English
