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Diffusion of Cs, I, and HDO in a pre-Neogene sedimentary rock

先新第三紀堆積岩を対象としたCs, I, HDO拡散挙動に関する研究

Hou, L.*; 戸田 賀奈子*; 深津 勇太  ; 石寺 孝充 ; 斉藤 拓巳*

Hou, L.*; Toda, Kanako*; Fukatsu, Yuta; Ishidera, Takamitsu; Saito, Takumi*

To investigate the barrier performance of a pre-Neogene sedimentary rock for deep geological disposal of high-level radioactive waste, the heterogeneity of the rock matrices and the diffusion behaviors of cesium, iodine, and HDO were examined. The structures of the rock samples examined by X-ray Computed Tomography are used to interpret the diffusion behaviors of the ions and HDO. The research reveals that the rock's heterogeneity significantly influences radionuclide diffusion, challenging traditional models and underscoring the need for advanced modeling.

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