R&D on fusion material. R&D on fusion blanket structural and functional materials

Fusion material development is the key R&D issues to realize the fusion blanket system which is expected to transform fusion energy to thermal energy and breed tritium under high energy fusion neutron bombardment. The structural material is expected to endure not only variation of mechanical loads but also high heat load and high energy neutron damage, and functional materials such as tritium breeder and neutron multiplier are expected to be chemically stable during the service. The current status of these fusion materials are summarized. (author)