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Radionuclide migration in single fracture of granodiorite at the Grimsel Test Site, 2; Mineral and pore investigations

Sato, Hisao*; Akagi, Yosuke*; Tachi, Yukio  ; Matsumoto, Kazuhiro

To validate radionuclide migration model in single fracture in crystalline rocks, the granodiorite sample with single fracture from the Grimsel Test Site in Switzerland was investigated focusing on the minerals and pores distributions. Mineral distributions from fracture surface to matrix were evaluated by X-ray CT, and were validated by comparing the elemental mapping measured by EPMA. Based on these results, the qualitative analysis methods for aperture and connectivity in fracture, and minerals distribution near fracture surface were developed.

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