Microstructure and micro/macro-diffusion behavior of tritium in bentonite |
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| Authors: | Y. Ichikawa K. Kawamura N. Fujii K. Kitayama |
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| Affiliation: | a Division of Environmental Engineering and Architecture, Graduate School of Environmental Studies, Nagoya University, Chikusa, Nagoya 464-8601, Japan;b Department of Earth and Planetary Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan;c Nuclear Waste Management Organization of Japan (NUMO), Minato, Tokyo 108-0014, Japan |
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| Abstract: | Diffusion of tritium water, HTO, in bentonite clay is investigated. The method provides a sequential procedure of microscopic characterizations of the clay by a confocal laser scanning microscope (CLSM), the molecular dynamics (MD) simulation and the micro-/macro-analysis by the homogenization analysis (HA) method in which the results of the microscope characterizations and the MD simulations are used. The diffusion properties of HTO calculated by HA agree with the experimental data. Then we simulate the diffusion behavior of HTO in the barrier system of high-level radioactive waste management. |
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| Keywords: | Bentonite Diffusion Tritium Molecular dynamics Multiscale homogenization analysis |
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