D R A F T - 16-Jan-2006
WBS 1.6 BLANKET SYSTEM

First Wall Panels for Blanket Modules

Procurement Package 1.6-1A
"Blanket First Wall "
ITER Cost 2001 for Sharing: 87.0 kIUA
Sharing: China = 10%; EU = 30%; Japan = 10 %;
South Korea = 10 %; Russia = 20%; USA = 20%
Function, Scope of Supply:

The primary first wall (FW) is the main plasma facing part of the blanket system. It covers a surface of 680 m2 around the plasma. Its main functions are:
- to provide a low-impurity plasma-compatible surface
- to withstand radiation and charged particle flux from the plasma during normal operation
- to provide a suitable protection to the shield from direct contact with the plasma and runaway electrons during off-normal events
- to provide a first high-dose shield which is removable in hot cell
The first wall consists of separate panels mounted on the body of the blanket shielding modules (see 1.6-1A). The FW is a faceted and built by multiple flat panels. A blanket module has four separate FW panels each supported by a central leg.

Description, Technologies :

The First wall/shield modules comprise a plasma facing first wall (FW) section, and a shielding section. The FW is designed to be de-mountable from the shielding section to reduce the module cost and the radioactive waste. Two horizontal and a vertical key are attached on the vacuum vessel in the inboard region and extended into keyways of the module to support the electromagnetic poloidal and toroidal forces. In the outboard region, three stub keys are attached at the flexible connector housings, and extend into keyways in the module. The keys are designed to open towards the centre of the module to avoid the key and key way sticking together under thermal expansion of the module and vacuum vessel.
The shield block it is a welded construction of machined stainless steel parts.

Main EIDI Activities Codes
50400
FORGING & PLATES/ MANUFACTURING TECHNIQUES
50800
PRECISION MACHINING WORK / MANUFACTURING TECHNIQUES
50100
SUPPLY OF RAW MATERIALS
50900
SPECIALIZED MANUFACTURING TECHNIQUES