Hydrogen diffusion in liquid lithium from 500 deg. C to 650 deg. C

In order to provide data for designing an Y hot trap to recover tritium from flowing liquid Li, diffusion coefficients and solubility constants of hydrogen in Li were determined with a capillary method between 500 deg. C and 650 deg. C. The diffusivity of hydrogen in Li determined here were correlated to D Li-H = 1.38 exp(-162[kJ/mol]/R g T). The correlation was consistent with one extrapolated from the previous Alire's correlation at higher temperature. Discrepancies among other previous diffusivity data were discussed in terms of the interaction of Li with H. The solubility determined was consistent with values extrapolated from the previous Sieverts' constant by Veleckis et al