Manufacturing technologies of breeding blanket components using reduced activation ferritic/martensitic steel

Hirose, Takanori; Tanigawa, Hiroyasu; Enoeda, Mikio

This paper summarizes manufacturing technologies of the water-cooled-solid-breeder blanket module for a fusion reactor using reduced activation ferritic/martensitic steel (RAFM). Although RAFM is very similar to commercial 9 Cr heat resistant steel, RAFM in the blanket is to be used as thin wall structure. Moreover, it is necessary to employ some new manufacturing technologies for the components such as hot-isostatic-pressing and fiber-laser-welding. Some full-scale mock-ups of the blanket have been developed using conventional and newly developed method. The mock-ups have been developed in industrial scale, and the mock-ups demonstrated integrity in the service condition of the blanket without non-nuclear environment. The mock-ups demonstrated their soundness under the service condition of the blanket.