Experiments on tritium behavior in beryllium, (3)

It is necessary to understand the tritium behavior in Be, in the case that Be is used as the neutron multiplier in fusion reactor. Therefore, the electrolytic polishing method was examined to determine tritium distribution in Be. In the preliminary experiment, we examined for the effect of the polishing solution, the distance between two electrodes, the temperature and stir of the polishing solution and current density for polishing. In the next experiment, the suitable polishing condition, i.e. the relation between voltage and current density was examined. Under this condition, the various tests were conducted to get the relation between electric quantity and the polished depth of Be or generated hydrogen volume, and the treatment efficiency of generated hydrogen. Furthermore, the tritium analysis in polishing solution were examined. From the results, the polishing condition was determined and the possibility of measuring tritium distribution in Be was ascertained. (author)