Improved modules for the blanket of RTO/RC ITER

This paper describes innovative design aspects that are considered to optim ise the blanket modules for the reduced technical objective/reduced cost in ternational thermonuclear experimental reactor. The blanket modules have a vertical straight profile facing the plasma, and the first wall is built in small and flat panels. Copper may be applied only in front of the first ro w of cooling passages. The radial cooling of the shield block avoids a comp lex by-pass at the back and opens up the possibility to use cast instead of forged steel. Slits in the shield block and in the first wall reduce the e lectromagnetic forces enough to allow the support of the modules on the ves sel and the mechanical attachment of the first wall panels. (C) 2000 Elsevi er Science B.V. All rights reserved.