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JAEA Reports

Monitoring of groundwater inflow into research galleries in the Mizunami Underground Research Laboratory Project (MIU Project); Fiscal year 2019

Onoe, Hironori; Takeuchi, Ryuji

JAEA-Data/Code 2020-015, 22 Pages, 2020/11

JAEA-Data-Code-2020-015.pdf:2.3MB
JAEA-Data-Code-2020-015-appendix(DVD-ROM).zip:2.42MB

Japan Atomic Energy Agency (JAEA) has been conducting Mizunami Underground Research Laboratory (MIU) Project, which is a broad scientific study of the deep geological environment as a basis of research and development for geological disposal of high-level radioactive waste, targeting in crystalline rock. The main goals of the MIU Project from Phase I to Phase III are: to establish techniques for investigation, analysis and assessment of the deep geological environment, and to develop a base of engineering for deep underground application. The groundwater inflow monitoring into shafts and research galleries, has been conducted to achieve the Phase II goals. Furthermore, these monitoring were ceased at the end of FY2019 due to the completion of the MIU project. This report describes the results of the groundwater inflow monitoring from April 2019 to March 2020.

JAEA Reports

Results of single borehole hydraulic tests in the Mizunami Underground Research Laboratory Project (FY2016 - FY2019)

Onoe, Hironori; Takeuchi, Ryuji

JAEA-Data/Code 2020-011, 50 Pages, 2020/11

JAEA-Data-Code-2020-011.pdf:2.44MB

This report summarize the results of the single borehole hydraulic test carried out at the -300 m Stage and the -500 m Stage of the Mizunami Underground Research Laboratory from FY 2016 to FY 2019. The details of each test (test interval depth, geology, etc.) as well as the interpreted hydraulic parameters and analytical methods used are presented in this report. Furthermore, the previous results of the single borehole hydraulic tests carried out in the Regional Hydrogeological Study Project and the Mizunami Underground Research Laboratory Project before FY 2016 are also summarized in this report.

JAEA Reports

Data of long term hydro-pressure monitoring on Mizunami Underground Research Laboratory Project for fiscal year 2017-2019

Onoe, Hironori; Takeuchi, Ryuji

JAEA-Data/Code 2020-010, 112 Pages, 2020/10

JAEA-Data-Code-2020-010.pdf:6.22MB
JAEA-Data-Code-2020-010-appendix1(DVD-ROM).zip:169.12MB
JAEA-Data-Code-2020-010-appendix2(DVD-ROM).zip:338.45MB
JAEA-Data-Code-2020-010-appendix3(DVD-ROM).zip:448.05MB

The Mizunami Underground Research Laboratory (MIU) Project has three overlapping phases: Surface-based Investigation phase (Phase I), Construction phase (Phase II), and Operation phase (Phase III), the project is being carried out under the Phase III. The main goals of the MIU Project from Phase I to Phase III are: to establish techniques for investigation, analysis and assessment of the deep geological environment, and to develop a base of engineering for deep underground application. One of the Phase III goals is to construct geological environment models and grasp deep geological changes when expanding the research gallery by research and investigations using research galleries. The long term hydro-pressure monitoring has been continued to achieve the Phase III goals. Furthermore, these monitoring were ceased at the end of FY2019 due to the completion of the MIU project. This report describes the results of the long term hydro-pressure monitoring from April 2017 to March 2020.

JAEA Reports

Data of long term hydro-pressure monitoring on Tono Regional Hydrogeological Study; Project for fiscal year 2019

Onoe, Hironori; Takeuchi, Ryuji

JAEA-Data/Code 2020-008, 41 Pages, 2020/08

JAEA-Data-Code-2020-008.pdf:3.14MB
JAEA-Data-Code-2020-008-appendix(CD-ROM).zip:93.51MB

Japan Atomic Energy Agency (JAEA) has been conducting a wide range of geoscientific research in order to build scientific and technological basis for geological disposal of nuclear wastes. This study aims to establish comprehensive techniques for the investigation, analysis and assessment of the deep geological environment in fractured crystalline rock. The Regional Hydrogeological Study (RHS) project is a one of the geoscientific research program at Tono Geoscience Center. This project started since April 1992 and main investigations were finished to FY2004. Since FY2005, hydrogeological and hydrochemical monitoring have been continued using the existing monitoring system. Furthermore, these monitoring were ceased at the end of FY2019 due to the completion of the RHS project. This report describes the results of the long term hydro-pressure monitoring for FY2019.

Journal Articles

Method for groundwater monitoring on the disposal of radioactive waste

Murakami, Hiroaki; Iwatsuki, Teruki; Takeuchi, Ryuji; Nishiyama, Nariaki*

Genshiryoku Bakkuendo Kenkyu (CD-ROM), 27(1), p.22 - 33, 2020/06

Geological disposal of radioactive waste requires the large amounts of fundamental technical knowledge throughout the project. Monitoring is carried out to collect site-relevant information for the creation of an environmental database, to assist in the decision-making process, etc. We summarized the current technical level and problems of the groundwater monitoring in the world. Through the research and technology development so far, the technologies have been developed for drilling borehole in the geological environment survey prior to monitoring and the selection of the monitoring site. However, the following technical developments are remaining issues: long-term operation method of monitoring equipment, retrieving method of monitoring equipment after long-term operation, transport method of backfill material for borehole sealing, technical basis for the sealing performance when the borehole-protective casing and strainer tube are left.

JAEA Reports

Study of groundwater sampling casing for monitoring device

Okihara, Mistunobu*; Yahagi, Ryoji*; Iwatsuki, Teruki; Takeuchi, Ryuji; Murakami, Hiroaki

JAEA-Technology 2019-021, 77 Pages, 2020/03

JAEA-Technology-2019-021.pdf:5.33MB

One of the major subjects of the ongoing geoscientific research program, the Mizunami Underground Research Laboratory (MIU) Project in the Tono area, central Japan, is accumulation of knowledge on monitoring techniques of the geological environment. In this report, the conceptual design of the monitoring system for groundwater pressure and water chemistry was carried out. The currently installed and used system in research galleries at various depths was re-designed to make it possible to collect groundwater and observe the water pressure on the ground.

JAEA Reports

Mizunami Underground Research Laboratory Project Annual Report for Fiscal Year 2018

Takeuchi, Ryuji; Iwatsuki, Teruki; Matsui, Hiroya; Nohara, Tsuyoshi; Onoe, Hironori; Ikeda, Koki; Mikake, Shinichiro; Hama, Katsuhiro; Iyatomi, Yosuke; Sasao, Eiji

JAEA-Review 2020-001, 66 Pages, 2020/03

JAEA-Review-2020-001.pdf:7.6MB

The Mizunami Underground Research Laboratory (MIU) Project is being pursued by the Japan Atomic Energy Agency (JAEA) to enhance the reliability of geological disposal technologies through investigations of the deep geological environment in the crystalline rock (granite) at Mizunami City, Gifu Prefecture, central Japan. On the occasion of JAEA reformation in 2014, JAEA identified three remaining important issues on the geoscientific research program based on the synthesized latest results of research and development (R&D): "Development of countermeasure technologies for reducing groundwater inflow", "Development of modeling technologies for mass transport" and "Development of drift backfilling technologies". The R&D on three remaining important issues have been carrying out in the MIU Project. In this report, the current status of R&D and construction activities of the MIU Project in fiscal year 2018 is summarized.

JAEA Reports

Data of long term hydro-pressure monitoring on Tono Regional Hydrogeological Study Project for fiscal year 2018

Onoe, Hironori; Takeuchi, Ryuji

JAEA-Data/Code 2019-010, 41 Pages, 2019/12

JAEA-Data-Code-2019-010.pdf:3.9MB
JAEA-Data-Code-2019-010-appendix(CD-ROM).zip:122.73MB

Japan Atomic Energy Agency (JAEA) has been conducting a wide range of geoscientific research in order to build scientific and technological basis for geological disposal of nuclear wastes. This study aims to establish comprehensive techniques for the investigation, analysis and assessment of the deep geological environment in fractured crystalline rock. The Regional Hydrogeological Study (RHS) project is a one of the geoscientific research program at Tono Geoscience Center. This project started since April 1992 and main investigations were finished to FY 2004. Since FY 2005, hydrogeological and hydrochemical monitoring have been continued using the existing monitoring system. This report describes the results of the long term hydro-pressure monitoring from April 2018 to March 2019.

JAEA Reports

Mizunami Underground Research Laboratory Project, Plan for fiscal year 2019

Takeuchi, Ryuji; Iwatsuki, Teruki; Matsui, Hiroya; Ikeda, Koki; Mikake, Shinichiro; Hama, Katsuhiro; Iyatomi, Yosuke; Matsuoka, Toshiyuki; Sasao, Eiji

JAEA-Review 2019-014, 30 Pages, 2019/10

JAEA-Review-2019-014.pdf:4.72MB

The Mizunami Underground Research Laboratory (MIU) Project is being pursued by the Japan Atomic Energy Agency(JAEA) to enhance the reliability of geological disposal technologies through investigations of the deep geological environment in the crystalline host rock(granite) at Mizunami City, Gifu Prefecture, central Japan. On the occasion of the reform of the entire JAEA organization in 2014, JAEA identified three important remaining issues on the geoscientific research program based on the synthesized latest results of research and development (R&D): "Development of countermeasure technologies for reducing groundwater inflow", "Development of modeling technologies for mass transport" and "Development of drift backfilling technology". The R&D on three remaining important issues have been carrying out in the MIU Project. This report summarizes the R&D activities planned for fiscal year 2019 on the basis of the MIU Master Plan updated in 2015 and Investigation Plan for the Third Medium to Long-term Research Phase.

JAEA Reports

Monitoring of groundwater inflow into research galleries in the Mizunami Underground Research Laboratory Project (MIU Project); From fiscal year 2016 to 2018

Onoe, Hironori; Takeuchi, Ryuji

JAEA-Data/Code 2019-009, 22 Pages, 2019/10

JAEA-Data-Code-2019-009.pdf:2.57MB
JAEA-Data-Code-2019-009-appendix(CD-ROM).zip:2.34MB

Tono Geoscience Center of Japan Atomic Energy Agency (JAEA) 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). As for The MIU Project (Phase II) was carried out from 2004 fiscal year, and has been started the Phase III in 2010 fiscal year. The groundwater inflow monitoring into shafts and research galleries, has been maintained to achieve the Phase II goals, begins in 2004 fiscal year and follows now. This document presents the results of the groundwater inflow monitoring from fiscal year 2016 to 2018.

JAEA Reports

Mizunami Underground Research Laboratory Project; Annual report for fiscal year 2017

Takeuchi, Ryuji; Iwatsuki, Teruki; Matsui, Hiroya; Nohara, Tsuyoshi; Onoe, Hironori; Ikeda, Koki; Mikake, Shinichiro; Hama, Katsuhiro; Iyatomi, Yosuke; Sasao, Eiji

JAEA-Review 2019-005, 76 Pages, 2019/06

JAEA-Review-2019-005.pdf:24.91MB

The Mizunami Underground Research Laboratory (MIU) project is being pursued by the Japan Atomic Energy Agency (JAEA) to enhance the reliability of geological disposal technologies through investigations of the deep geological environment in the crystalline rock (granite) at Mizunami City, Gifu Prefecture, central Japan. On the occasion of the research program and management system revision of the entire JAEA organization in 2014, JAEA identified three remaining important issues on the geoscientific research program based on the latest results of the synthesizing research and development: "Development of countermeasure technologies for reducing groundwater inflow", "Development of modeling technologies for mass transport" and "Development of drift backfilling technologies". The research and development on three remaining important issues have been carrying out on the MIU project. In this report, the current status of the research and development activities and construction in fiscal year 2017 is summarized.

Journal Articles

Development of evaluation method for variability of groundwater flow conditions associated with long-term topographic change and climate perturbations

Onoe, Hironori; Kosaka, Hiroshi*; Matsuoka, Toshiyuki; Komatsu, Tetsuya; Takeuchi, Ryuji; Iwatsuki, Teruki; Yasue, Kenichi

Genshiryoku Bakkuendo Kenkyu (CD-ROM), 26(1), p.3 - 14, 2019/06

In this study, it is focused on topographic changes due to uplift and denudation, also climate perturbations, a method which is able to assess the long-term variability of groundwater flow conditions using the coefficient variation based on some steady-state groundwater flow simulation results was developed. Spatial distribution of long residence time area which is not much influenced due to long-term topographic change and recharge rate change during the past one million years was able to estimate through the case study of the Tono area, Central Japan. By applying this evaluation method, it is possible to identify the local area that has low variability of groundwater flow conditions due to topographic changes and climate perturbations from the regional area quantitatively and spatially.

JAEA Reports

Data of long term hydro-pressure monitoring on Tono Regional Hydrogeological Study Project for fiscal year 2017

Keya, Hiromichi; Onoe, Hironori; Takeuchi, Ryuji

JAEA-Data/Code 2019-001, 49 Pages, 2019/03

JAEA-Data-Code-2019-001.pdf:6.06MB
JAEA-Data-Code-2019-001-appendix(CD-ROM).zip:178.77MB

A wide range of geoscientific research aims to establish comprehensive techniques for the investigation, analysis and assessment of the deep geological environment in fractured crystalline rock. The Regional Hydrogeological Study (RHS) project is a one of the geoscientific research program at Tono Geoscience Center. This project started since April 1992 and main investigations were finished to March 2004. Since 2005, hydrogeological and hydrochemical monitoring have been continued using the existing monitoring system. This report describes the results of the long term hydro-pressure monitoring from April 2017 to March 2018.

JAEA Reports

Data of long term hydro-pressure monitoring on Tono Regional Hydrogeological Study Project for fiscal year 2015-2016

Keya, Hiromichi; Takeuchi, Ryuji; Iwatsuki, Teruki

JAEA-Data/Code 2018-020, 58 Pages, 2019/03

JAEA-Data-Code-2018-020.pdf:3.19MB
JAEA-Data-Code-2018-020-appendix1(CD-ROM).zip:203.36MB
JAEA-Data-Code-2018-020-appendix2(CD-ROM).zip:168.01MB

A wide range of geoscientific research aims to establish comprehensive techniques for the investigation, analysis and assessment of the deep geological environment in fractured crystalline rock. The Regional Hydrogeological Study (RHS) project is a one of the geoscientific research program at Tono Geoscience Center. This project started since April 1992 and main investigations were finished to March 2004. Since 2005, hydrogeological and hydrochemical monitoring have been continued using the existing monitoring system. This report describes the results of the long term hydro-pressure monitoring from April 2015 to March 2017.

JAEA Reports

Data of long term hydro-pressure monitoring on Mizunami Underground Research Laboratory Project for fiscal year 2015-2016

Keya, Hiromichi; Takeuchi, Ryuji; Iwatsuki, Teruki

JAEA-Data/Code 2018-019, 107 Pages, 2019/03

JAEA-Data-Code-2018-019.pdf:11.01MB
JAEA-Data-Code-2018-019-appendix1(DVD-ROM).zip:419.48MB
JAEA-Data-Code-2018-019-appendix2(DVD-ROM).zip:374.0MB
JAEA-Data-Code-2018-019-appendix3(DVD-ROM).zip:312.2MB

The MIU Project has three overlapping phases: Surface-based Investigation phase (Phase I), Construction phase (Phase II), and Operation phase (Phase III), the project is being carried out under the Phase III. The main goals of the MIU Project from Phase I to Phase III are: to establish techniques for investigation, analysis and assessment of the deep geological environment, and to develop a base of engineering for deep underground application. One of the Phase III goals is to construct geological environment models and grasp deep geological changes when expanding the research gallery by research and investigations using research galleries. The long term hydro-pressure monitoring has been continued to achieve the Phase III goals. This report describes the results of the long term hydro-pressure monitoring from April 2015 to March 2017.

JAEA Reports

Mizunami Underground Research Laboratory Project, Plan for fiscal year 2018

Takeuchi, Ryuji; Iwatsuki, Teruki; Matsui, Hiroya; Ikeda, Koki; Mikake, Shinichiro; Hama, Katsuhiro; Iyatomi, Yosuke; Sasao, Eiji

JAEA-Review 2018-019, 29 Pages, 2018/12

JAEA-Review-2018-019.pdf:6.16MB

The Mizunami Underground Research Laboratory (MIU) Project is being pursued by the Japan Atomic Energy Agency (JAEA) to enhance the reliability of geological disposal technologies through investigations of the deep geological environment in the crystalline host rock (granite) at Mizunami, Gifu Prefecture, central Japan. On the occasion of the reform of the entire JAEA organization in 2014, JAEA identified three important issues on the geoscientific research program: "Development of countermeasure technologies for reducing groundwater inflow", "Development of modelling technologies for mass transport" and "Development of drift backfilling technology", based on the latest results of the synthesizing research and development (R&D). The R&D on three remaining important issues have been carrying out on the MIU Project. This report summarizes the R&D activities planned for fiscal year 2018 on the basis of the MIU Master Plan updated in 2015 and Investigation Plan for the Third Medium to Long-term Research Phase.

JAEA Reports

Data of long term hydro-pressure monitoring on Mizunami Underground Research Laboratory Project for fiscal year 2013-2014

Keya, Hiromichi; Beppu, Shinji*; Takeuchi, Ryuji

JAEA-Data/Code 2018-011, 112 Pages, 2018/10

JAEA-Data-Code-2018-011.pdf:10.11MB
JAEA-Data-Code-2018-011-appendix1(DVD-ROM).zip:388.14MB
JAEA-Data-Code-2018-011-appendix2(DVD-ROM).zip:467.11MB
JAEA-Data-Code-2018-011-appendix3(DVD-ROM).zip:325.24MB

Mizunami Underground Research Laboratory (MIU) Project has three overlapping phases: Surface-based investigation phase (Phase I), Construction phase (Phase II), and Operation phase (Phase III), with a total duration of 20 years. Currently, the project is being carried out under the Phase II and the Phase III. One of the Phase II goals of Project is set to develop and revise models of the geological environment using the investigation results obtained during excavation, and determine and assess the changes in the geological environment in response to excavation. The long term hydro-pressure monitoring has been continued to achieve the Phase II goals. This paper describes the results of the long term hydro-pressure monitoring from April 2013 to March 2015.

JAEA Reports

Data of long term hydro-pressure monitoring on Tono Regional Hydrogeological Study Project for fiscal year 2013$$sim$$2014

Beppu, Shinji*; Keya, Hiromichi; Takeuchi, Ryuji

JAEA-Data/Code 2018-010, 58 Pages, 2018/10

JAEA-Data-Code-2018-010.pdf:7.0MB
JAEA-Data-Code-2018-010-appendix(DVD-ROM).zip:285.7MB

This study aims to establish comprehensive techniques for the investigation, analysis and assessment of the deep geological environment in fractured crystalline rock. The Regional Hydrogeological Study (RHS) Project is a one of the geoscientific research program at Tono Geoscience Center. This project started since April 1992 and main investigations were finished to March 2004. Since 2005, hydrogeological and hydrochemical monitoring have been continued using the existing monitoring system. This report describes the results of the long term hydro-pressure monitoring from April 2013 to March 2015.

JAEA Reports

Mizunami Underground Research Laboratory Project annual report for fiscal year 2016

Ishibashi, Masayuki; Hama, Katsuhiro; Iwatsuki, Teruki; Matsui, Hiroya; Takeuchi, Ryuji; Nohara, Tsuyoshi; Onoe, Hironori; Ikeda, Koki; Mikake, Shinichiro; Iyatomi, Yosuke; et al.

JAEA-Review 2017-026, 72 Pages, 2018/01

JAEA-Review-2017-026.pdf:18.23MB

The Mizunami Underground Research Laboratory (MIU) project is being pursued by the Japan Atomic Energy Agency (JAEA) to enhance the reliability of geological disposal technologies through investigations of the deep geological environment in the crystalline host rock (granite) at Mizunami, Gifu Prefecture, central Japan. On the occasion of the research program and management system revision of the entire JAEA organization in 2014, JAEA identified three important issues on the geoscientific research program: "Development of countermeasure technologies for reducing groundwater inflow", "Development of modeling technologies for mass transport" and "Development of drift backfilling technologies", based on the latest results of the synthesizing research and development (R&D). The R&D on three important issues have been carrying out on the MIU project. In this report, the current status of R&D activities and construction in 2016 is summarized.

JAEA Reports

Mizunami Underground Research Laboratory Project, Plan for fiscal year 2017

Ishibashi, Masayuki; Hama, Katsuhiro; Iwatsuki, Teruki; Matsui, Hiroya; Takeuchi, Ryuji; Ikeda, Koki; Mikake, Shinichiro; Iyatomi, Yosuke; Sasao, Eiji; Koide, Kaoru

JAEA-Review 2017-019, 29 Pages, 2017/10

JAEA-Review-2017-019.pdf:3.21MB

The Mizunami Underground Research Laboratory (MIU) project is being pursued by the Japan Atomic Energy Agency (JAEA) to enhance the reliability of geological disposal technologies through investigations of the deep geological environment in the crystalline host rock (granite) at Mizunami City in Gifu Prefecture, central Japan. On the occasion of the reform of the entire JAEA organization in 2014, JAEA identified three important issues on the geoscientific research program: "Development of countermeasure technologies for reducing groundwater inflow", "Development of modelling technologies for mass transport" and "Development of drift backfilling technology", based on the latest results of the synthesizing research and development (R&D). These R&D on three remaining important issues have been carrying out on the MIU project. This report summarizes the R&D activities planned for fiscal year 2017 based on the MIU Master Plan updated in 2015 and so on.

253 (Records 1-20 displayed on this page)