Thermal Diffusion of Tritium and Protium in Alpha Phase of Zirconium

M. Sugisaki; H. Furuya, H, Sekiya; K. Hashizume

doi:dx.doi.org/10.13182/FST88-A25220

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Thermal Diffusion of Tritium and Protium in Alpha Phase of Zirconium

M. Sugisaki, H. Furuya, H, Sekiya, K. Hashizume

Fusion Science and Technology / Volume 14 / Number 2P2A / September 1988 / Pages 723-728

Tritium Properties and Interactions with Material / Proceedings of the Third Topical Meeting on Tritium Technology in Fission, Fusion and Isotopic Applications (Toronto, Ontario, Canada, May 1-6, 1988) / dx.doi.org/10.13182/FST88-A25220

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Heat of transports Q* of hydrogen isotopes in the ^α-phase of Zr have been measured in temperature regions from 623K to 673K for H and from 523K to 623K for T by analysing the redistribution process under a thermal gradient. An isotope mass dependence of Q* has not been unequivocally established though a tendency that Q*(H)>Q*(T) has been observed. These data have been discussed on the basis of the biased-jump diffusion model, and a large negative bias effect has been pointed out as characteristics of Q* of hydrogen isotopes in group-IV metals in comparison with the case of group-V metals.