Abstract
Effects of oxygen potential on tritium recovery from Li 2 O were quantitatively studied by in-situ tritium release experiments named TTTEx at the University of Tokyo using sweep gases of He + H 2 and He + H 2 +H 2 O. The oxygen potential in the experimental system was calculated from the chemical composition of the sweep gas. It was found to be influenced by the oxygen concentration at the surface of samples which was strongly affected by the method of pre-treatment. The tritium release rate was found to be affected both by the oxygen potential and by the swamping effect with H 2 and/or H 2 O in the sweep gas. Chemical form of the recovered tritium also had a strong relationship with the oxygen potential in the sweep gases.
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