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Shibata, Masahiro; Sawada, Atsushi; Tachi, Yukio; Makino, Hitoshi; Wakasugi, Keiichiro; Mitsui, Seiichiro; Kitamura, Akira; Yoshikawa, Hideki; Oda, Chie; Ishidera, Takamitsu; et al.
JAEA-Research 2014-030, 457 Pages, 2015/03
JAEA and NUMO have conducted a collaborative research work which is designed to enhance the methodology of repository design and post-closure performance assessment in preliminary investigation stage. With regard to (1) study on rock suitability in terms of hydrology, based on some examples of developing method of hydro-geological structure model, acquired knowledge are arranged using the tree diagram, and model uncertainty and its influence on the evaluation items were discussed. With regard to (2) study on scenario development, the developed approach for "defining conditions" has been reevaluated and improved from practical viewpoints. In addition, the uncertainty evaluation for the effect of use of cementitious material, as well as glass dissolution model, was conducted with analytical evaluation. With regard to (3) study on setting radionuclide migration parameters, based on survey of precedent procedures, multiple-approach for distribution coefficient of rocks was established, and the adequacy of the approach was confirmed though its application to sedimentary rock and granitic rock. Besides, an approach for solubility setting was developed including the procedure of selection of solubility limiting solid phase. The adequacy of the approach was confirmed though its application to key radionuclides.
Shibata, Masahiro; Sawada, Atsushi; Tachi, Yukio; Hayano, Akira; Makino, Hitoshi; Wakasugi, Keiichiro; Mitsui, Seiichiro; Oda, Chie; Kitamura, Akira; Osawa, Hideaki; et al.
JAEA-Research 2013-037, 455 Pages, 2013/12
Following FY2011, JAEA and NUMO have conducted a collaborative research work which is designed to enhance the methodology of repository design and performance assessment in preliminary investigation stage. With regard to (1) study on rock suitability in terms of hydrology, the tree diagram of methodology of groundwater travel time has been extended for crystalline rock, in addition, tree diagram for sedimentary rock newly has been organized. With regard to (2) study on scenario development, the existing approach has been improved in terms of a practical task, and applied and tested for near field focusing on the buffer. In addition, the uncertainty of some important processes and its impact on safety functions are discussed though analysis. With regard to (3) study on setting radionuclide migration parameters, the approaches for parameter setting have been developed for sorption for rocks and solubility, and applied and tested through parameter setting exercises for key radionuclides.
Takebe, Shinichi; Fujiwara, Keiji*; Moriyama, Hirotake*
Nihon Genshiryoku Gakkai "Shisetsu, Kankyo Hoshano Dotai" Kenkyu Senmon Iinkai Hokokusho, p.1 - 9, 2003/03
no abstracts in English
Hara, Keiji; Fujiwara, Hiroshi*; *
Waste Management 2002 Conference (WM'02), 0 Pages, 2002/00
None
Hara, Keiji; Oda, Hideki*; Fujiwara, Hiroshi*; Tsukamoto, Masaki*; Mano, Tadashi
Genshiryoku Bakkuendo Kenkyu, 6(2), p.233 - 253, 2000/05
None
Fukumoto, Naoyuki*; Fujiwara, Makoto*; Kuramoto, Keiji*; Ageishi, Masaya*; Nagata, Masayoshi*; Uyama, Tadao*; Ogawa, Hiroaki; Kasai, Satoshi; Hasegawa, Koichi; Shibata, Takatoshi
Proceedings of American Physical Society 39th Annual Meeting of the Division of Plasma Physics, 1 Pages, 1997/00
no abstracts in English