Tritium accountancy and storage by hydrogen adsorption alloy in fusion fuel cycle

Yamanishi, Toshihiko; Hayashi, Takumi; Kawamura, Yoshinori

The fusion fuel cycle is composed of isotope separation, impurity processing, and tritium storage systems. The tritium is a fuel of fusion reactor, and the tritium storage system recovering and supplying tritium plays an important role in the fuel cycle. There are several alloys which can be used for the storage of tritium; ZrCo alloy has been applied for ITER from the following reasons. The alloy of ZrCo is quite stable in comparison with Uranium. The equilibrium pressure is quite low at room temperature. In this report, recent activities and results on this ZrCo tritium storage bed has been described. Some important ceramic materials, which have been used for hydrogen recovery as the proton conductors, are also reported.