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Kajimoto, Ryoichi; Yokoo, Tetsuya*; Nakamura, Mitsutaka; Kawakita, Yukinobu; Matsuura, Masato*; Endo, Hitoshi*; Seto, Hideki*; Ito, Shinichi*; Nakajima, Kenji; Kawamura, Seiko
Physica B; Condensed Matter, 562, p.148 - 154, 2019/06
Times Cited Count：15 Percentile：60.55(Physics, Condensed Matter)Seto, Hideki; Ito, Shinichi; Yokoo, Tetsuya*; Endo, Hitoshi*; Nakajima, Kenji; Shibata, Kaoru; Kajimoto, Ryoichi; Kawamura, Seiko; Nakamura, Mitsutaka; Kawakita, Yukinobu; et al.
Biochimica et Biophysica Acta; General Subjects, 1861(1), p.3651 - 3660, 2017/01
Times Cited Count：32 Percentile：80.4(Biochemistry & Molecular Biology)J-PARC, Japan Proton Accelerator Research Complex provides short pulse proton beam at a repetition rate 25 Hz and the maximum power is expected to be 1 MW. Materials and Life Science Experimental Facility (MLF) has 23 neutron beam ports and 21 instruments have already been operated or under construction / commissioning. There are 6 inelastic / quasi-elastic neutron scattering spectrometers and the complementary use of these spectrometers will open new insight for life science.
Kawamura, Hideki*; Ando, Kenichi*; Noda, Masaru*; Tanaka, Tatsuya*; Matsuda, Takeshi*; Fujii, Haruhiko*; Hashimoto, Shuji*; Ueda, Tadashi*; Matsui, Hiroya; Takeuchi, Shinji; et al.
JAEA-Technology 2009-081, 182 Pages, 2010/03
JAEA-Technology-2009-081.pdf:28.89MB
Grouting has practical importance for the reduction of groundwater inflow into excavations during construction of underground facilities. Considering the performance assessment of a radioactive waste repository, the performance of the engineered barrier system could be adversely affected by a high pH plume generated from grout. Therefore, a quantitative estimation of the effectiveness of grouting and grout material is essential. This study has been performed in the Mizunami URL being excavated in crystalline rock as a part of the Project for Grouting Technology Development for the Radioactive Waste Repository funded by METI, Japan. The aims were to evaluate the applicability of existing grouting technology and to develop methodology to determine the distribution of grout and change in hydraulic properties of the grouted rock volume. The target rock is the volume of rock around a planned refuge niche where the pre-excavation grouting was performed at 200-m depth from ground surface. After excavation of the refuge niche, ten boreholes were drilled and different kinds of investigations were carried out during and after drilling. The results were integrated and groundwater flow analysis of pre and post excavation grouting conditions were carried out to estimate quantitatively the effect of pre-excavation grouting. The results suggest that current pre-excavation grouting technology is effective for reduction of groundwater inflow into excavations and that hydraulic conductivity of the surrounding rock can be reduced by more than one order of magnitude.
Masuda, Sumio*; Kawamura, Hideki*; McKinley, I. G.*; Kitayama, Kazumi*; Umeki, Hiroyuki
Proceedings of Radioactive Waste Management; The Next Step: Confidence, Safety and Implementation, 8 Pages, 2006/06
Many of the "standard" designs for deep geological radwaste repositories were developed decades ago and have altered little since. Changing boundary conditions - both technical and socio-economic - are driving increasing interest in the consideration of alternatives, particularly for disposal of higher activity and longer-lived wastes. This was particularly the case in Japan, following the decision by NUMO to proceed with site selection based on a volunteering process. The work by NUMO to examine alternatives provides a good illustration of the range of possibilities which are available to allow flexible tailoring of design to fit both the characteristics of volunteer sites and the desires of local communities. On an even larger scale, however, the 21st century can be expected to bring challenges that will affect the future nuclear power generation at both national and global levels. As repository project are planned and implemented over timescales of many decades, such uncertainties should be taken into account to ensure that waste disposal projects initiated now remain appropriate to the future generations who will build, operate and close them.
Masuda, Sumio*; Kawamura, Hideki*; McKinley, I. G.*; Neall, F. B.*; Umeki, Hiroyuki
Proceedings of 11th International High-Level Radioactive Waste Management Conference (IHLRWM) (CD-ROM), p.507 - 514, 2006/00
There has been increasing international interest in repository designs, particularly for high-level radioactive waste (HLW) or spent fuel (SF), which maintain the option of ease of retrieval for long periods of time. Such delayed closure may be driven by either a need to slowly gain social acceptance or a desire to maintain the future option of reprocessing of spent fuel in view of the resurgence of interest in nuclear power. In either case, there are advantages in repository concepts which are specifically developed with this requirement in mind, rather than attempting to modify designs developed under different boundary conditions. The CARE concept is an example of such a design. In the present paper, the basic concept is outlined and examined with respect to optimisation of both operational and post-closure safety.
Kawamura, Hideki*; Noda, Masaru*; Nishikawa Naohito*; Sato, Shoko*; Tanaka, Tatsuya*
JNC TJ7410 2003-002, 515 Pages, 2003/03
JNC-TJ7410-2003-002.pdf:25.77MB
Tono Geoscience Center (TGC) of Japan Nuclear Cycle Development Institute has been conducting the Regional Groundwater Investigation and Mizunami Underground Laboratory (MIU) Project in order to develop investigation technologies and evaluation methods of geological environment. At present, towards the next progeress reporting on research and development for geological disposal of HLW in Japan, based on the existing research and development results, the Projects which are conducted at Tono Geoscience Center are required for promoting the MIU program smoothly and effeciently with regard to the current Japanese HLW program. According to such situation, for planning of the geological environment investigation and research at TGC and the next progress reporting, this study has investigated and summarizes overseas environmental impact assessments for final disposal, overseas site characterization and site selection, and overseas research plan of underground research laboratories. Based on the results of investigation, some technologies which have possibility to be applied to the MIU Project have been studied. Also overseas quality assurance programs have been investigated, and examples of the application of their concepts to MIU project have been considered.
Kawamura, Hideki*; Noda, Masaru*
JNC TJ7410 2002-002, 140 Pages, 2002/03
JNC-TJ7410-2002-002.pdf:3.45MB
no abstracts in English
Kawamura, Hideki*; Noda, Masaru*
JNC TJ7410 2002-003, 173 Pages, 2001/03
JNC-TJ7410-2002-003.pdf:8.54MB
no abstracts in English
Kawamura, Hideki*; Noda, Masaru*
JNC TJ7410 2002-001, 128 Pages, 2000/02
JNC-TJ7410-2002-001.pdf:5.02MB
no abstracts in English
Kajimoto, Ryoichi; Nakamura, Mitsutaka; Shibata, Kaoru; Yamada, Takeshi*; Endo, Hitoshi*; Ito, Shinichi*; Yokoo, Tetsuya*; Nakajima, Kenji; Kawamura, Seiko; Kawakita, Yukinobu; et al.
no journal, ,
Kajimoto, Ryoichi; Yokoo, Tetsuya*; Nakamura, Mitsutaka; Shibata, Kaoru; Kawakita, Yukinobu; Matsuura, Masato*; Endo, Hitoshi*; Seto, Hideki*; Ito, Shinichi*; Nakajima, Kenji; et al.
no journal, ,
no abstracts in English
Kajimoto, Ryoichi; Yokoo, Tetsuya*; Nakamura, Mitsutaka; Kawakita, Yukinobu; Matsuura, Masato*; Endo, Hitoshi*; Seto, Hideki*; Ito, Shinichi*; Nakajima, Kenji; Kawamura, Seiko
no journal, ,
Kajimoto, Ryoichi; Yokoo, Tetsuya*; Nakamura, Mitsutaka; Kawakita, Yukinobu; Matsuura, Masato*; Endo, Hitoshi*; Seto, Hideki*; Ito, Shinichi*; Nakajima, Kenji; Kawamura, Seiko
no journal, ,
no abstracts in English
