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Oral presentation

Development of Li resource recycle technology for tritium breeding materials in Broader Approach

Hoshino, Tsuyoshi; Hayashi, Kimio; Nakamura, Mutsumi*; Nemoto, Tadahiro*; Tatenuma, Katsuyoshi*

no journal, , 

no abstracts in English

Oral presentation

Development of mass production technology of advanced solid breeder material for ITER-TBM

Hoshino, Tsuyoshi; Nemoto, Tadahiro*; Nakamura, Mutsumi*; Suzuki, Akihiro*; Hayashi, Kimio; Tatenuma, Katsuyoshi*; Terai, Takayuki*

no journal, , 

no abstracts in English

Oral presentation

Matrix diffusion and sorption of Cs$$^{+}$$, Na$$^{+}$$, I$$^{-}$$ and HTO in granodiorite; Laboratory results and their extrapolation to the in-situ condition

Tachi, Yukio; Ebina, Takanori*; Takahashi, Hiroaki; Nemoto, Kazuaki; Suyama, Tadahiro*; Martin, A.*

no journal, , 

Matrix diffusion and sorption of radionuclides in crystalline host rocks are key processes controlling safe geological disposal of radioactive waste. Diffusion and sorption parameters for Cs$$^{+}$$, Na$$^{+}$$, I$$^{-}$$ and HTO were determined by laboratory experiments using granodiorite samples from the Grimsel Test Site, Switzerland. The De values derived were in the order Cs$$^{+}$$ $$>$$ Na$$^{+}$$ $$>$$ HTO $$>$$ I$$^{-}$$. The capacity factor and Kd values show the same trends. Depth profiles of Cs$$^{+}$$ and Na$$^{+}$$ obtained by abrasing samples after a diffusion period showed typical dual profiles. The results of in-situ long-term diffusion tests at GTS were interpreted by using GoldSim code and transport parameters based on laboratory results and their extrapolations to in-situ conditions. These model calculations could the in-situ LTD results of Cs$$^{+}$$ and Na$$^{+}$$ reasonably well, although it was difficult to interpret HTO results. Key findings from these comparative studies between laboratory experiments and in-situ LTD tests were discussed.

Oral presentation

Corrosion property of sheath materials using MI cables at conditions simulated severe accident, 2

Nakano, Hiroko; Hirota, Noriaki; Takeuchi, Tomoaki; Shibata, Hiroshi; Nemoto, Tadahiro*; Hanamoto, Yukio*; Tsuchiya, Kunihiko

no journal, , 

no abstracts in English

Oral presentation

Corrosion behavior of sheath materials using signal cables under light water reactor severe accident environment, 2

Nakano, Hiroko; Hirota, Noriaki; Takeuchi, Tomoaki; Shibata, Hiroshi; Nemoto, Tadahiro*; Hanamoto, Yukio*; Tsuchiya, Kunihiko

no journal, , 

no abstracts in English

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