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Ota, Ryosuke*; Mitsuyama, Kazuaki*; Tachi, Yukio; Yotsuji, Kenji*; Sato, Tomofumi*; Sato, Hisao*; Martin, A.*
no journal, ,
The radionuclide migration model representing heterogeneities in distributions of minerals and pores was developed for Grimsel granodiorite. This model was applied to quantify the impact of heterogeneities on radionuclide migration and was validated by comparing with the measured data.
Mitsuyama, Kazuaki*; Takeda, Masaki; Sugita, Yutaka; Ono, Hirokazu; Wakasugi, Keiichiro*; Takase, Hiroyasu*; Takahashi, Hirokazu*; Hashimoto, Tomoko*
no journal, ,
no abstracts in English
Takahashi, Hirokazu*; Takeda, Masaki; Sugita, Yutaka; Ono, Hirokazu; Wakasugi, Keiichiro*; Takase, Hiroyasu*; Mitsuyama, Kazuaki*; Hashimoto, Tomoko*
no journal, ,
no abstracts in English
Koo, Shigeru*; Makino, Hitoshi; Yamaguchi, Masaaki; Ebashi, Takeshi; Takahashi, Hirokazu*; Tsuchiya, Terumitsu*; Mitsuyama, Kazuaki*
no journal, ,
no abstracts in English
Takubo, Yusaku*; Takayama, Yusuke; Kawama, Daisuke*; Mitsuyama, Kazuaki*; Sugita, Yutaka; Ishida, Keisuke*
no journal, ,
In order to understand the phenomena and conditions that should be noted when evaluating the infiltration behavior of water in the buffer material during the re-saturation process of the engineered barrier system, Authors are working on a comparative evaluation of previous test results and coupled analysis results. The development status of the technology to evaluate the influence of thermal, chemical, and mechanical processes using coupled analysis is presented.
Yotsuji, Kenji*; Tachi, Yukio; Mitsuyama, Kazuaki*
no journal, ,
In the geological disposal of radioactive wastes, clay-sand mixed media play a key role in the barrier system, and a quantitative understanding of the radionuclide diffusion behavior in these media is important for safety assessment. In this paper, structural models of clay-sand mixed media were developed, and radionuclides were randomly walked in the structural models to simulate radionuclide migration. At that time, the volume fraction of sand was systematically changed, and then the critical behavior of the structural factors of the medium was evaluated.