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Tritium and Lithium Diffusion Mechanism in Neutron-Irradiated β-6LiAl

H. Sugai, M. Yahagi, H. Hamanaka, K. Kuriyama, T. Hshimoto

Fusion Science and Technology / Volume 41 / Number 3P2 / May 2002 / Pages 1030-1034

Blanket Material and Process / Proceedings of the Sixth International Conference on Tritium Science and Technology Tsukuba, Japan November 12-16, 2001

In the Japan Atomic Energy Research Institute (JAERI), technology for tritium production by use of 6LiAl alloy has been developed with the aim of furnishing tritium for fusion research. The alloy contains β-phase, i.e., intermetallic compound β-LiAl, which has a large influence on the tritium behavior in 6Li-Al alloy. Since β-LiAl has a unique crystal structure and a large amount of Li vacancy at room temperature, the tritium behavior in β-LiAl is affected by the defect structure and the lithium diffusion. In this paper, on the basis of a simultaneous measurement of tritium release rate and electrical reseistivity, it is suggested that the tritium diffusion has a strong correlation with the lithium diffusion in the neutron-irradiated β-6LiAl.

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