Design feature of 'Monju' heavy components

Development of the ''Monju'', same as the experimental reactor ''Joyo'', is promoted as a national project, and our company is engaged in the design and manufacture of its heavy components, such as the reactor vessel (R/V), guard vessel (G/V), core internal (C/I), containment vessel (C/V) and steam generator (S/G). The design feature of these heavy components are introduced in this paper, together with special design considerations relating to them. (author)