Radiochemical characteristics of tritium to be considered in fusion reactor facility design

The results of research and development related to radiochemical characteristics of tritium to be considered in a fusion reactor facility design are summarized. Reactions induced by tritium beta-decay under presence of high purity tritium, which might give an impact to tritium inventory control and safety, have been identified and investigated. Results of researches of radiolysis of tritiated water implied necessity of some measures to prevent hydrogen explosion and avoid a corrosive condition. A calorimetric method to measure tritium decay heat has been applied successfully to accountancy of the ITER fuel storage system with satisfaction of the required specification.