EFDA-JET-CP(06)04/02

Conceptual Design for a Bulk Tungsten Divertor Tile in JET

The ITER-like Wall project (ILW) for JET aims at providing the plasma chamber of the tokamak with an environment of mixed materials which will be relevant for the first wall construction on ITER. Tungsten plays a key role in the divertor cladding. For the central tile, also called LB-SRP for "Load-Bearing Septum Replacement Plate", bulk tungsten is envisaged in order to cope with the high heat loads expected (up to 10MW/m2 for 10s). The outer strikepoint in the divertor will be positioned on this tile for the most relevant configurations. Forschungszentrum Jülich (FZJ) has developed a conceptual design for this element, based on an assembly of tungsten blades or lamellae. An appropriate interface with the base carrier of JET, on which modules of two tiles are positioned and fixed by Remote Handling procedures (RH), is a substantial part of the design. Important issues are the electromagnetic forces and expected temperature distribution, together with compliance with the requirements for the plasma-wall interaction, with the JET configuration and with remote handling possibilities. Material choices combine tungsten, TZM., Inconel. and ceramics parts. The completed design has been finalised in a recent proposal to the ILW project, with utmost ITER-relevance.
Name Size  
EFDC060402 605.85 Kb