Abstract
A post-irradiation annealing experiment was performed to determine the mechanism of reactions of tritium with irradiation-induced defects in a candidate solid breeder material, Li 2O. The chemical state distribution of tritium was observed to depend on neutron fluence and to vary with time and temperature during the annealing. The results were analyzed by taking into account the reactions of tritium with irradiation defects and the rate constants were determined. By using the rate constants, a simple model was developed to predict the effect of irradiation on the tritium recovery, that is the production of noncondensable tritium species, at in situ conditions of actual blanket systems. The prediction agreed very well with the observation in an in situ tritium recovery experiment.
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