Low Activation Characteristics of Several Heats of V-4Cr-4Ti Ingot

Several heats of V-4Cr-4Ti ingot made in Japan, China and USA were chemically analyzed in detail. l-ow activation characteristics were estimated by using the criteria on waste disposal and materials recycling. V-4Cr-4Ti alloy heats fabricated in Japan and China satisfy the low activation criteria for shallou land burial, while the US heats does not because of Nb and Mo content. Neither single (1 cycle) nor muitiple (120 cycles) hands-on recycling criteria is satisfied by the current vanadium heats. However, Japaner;e and the Chinese heats meet the quasi-remote recycling criteria. Single and multiple remote recyclirg is satisfied, or will be not much difficult for the Japanese and the Chinese heats. Further reducticn in highly radioactive impurity element is feasible by minor improvements of fabrication process.