Release Characteristics of Tritium from High-Purity Lithium Oxide
Fusion Science and Technology / Volume 8 / Number 2P2 / September 1985 / Pages 2054-2060
Fusion Reactor / Proceedings of the Second National Topical Meeting on Tritium Technology in Fission, Fusion and Isotopic Applications (Dayton, Ohio, April 30 to May 2, 1985) / dx.doi.org/10.13182/FST85-A24587
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Rates of tritium release from neutron-irradiated lithium oxide were determined from isothermal release experiments. High-purity, monocrystalline lithium oxide was purged ex-reactor with helium and helium-hydrogen gas streams. Overall release was found to be controlled by solid-phase diffusion, and was predominantly in the form of condensible species. The diffusion coefficient, D, was given by
The result of an independent concentration profile analysis at 923 K was in agreement with the gas release diffusion coefficient. Sweeping the Li2O with hydrogen-containing gas was found to enhance tritium removal during the early stage of each run.
