This title appears in the Scientific Report :
2009
Please use the identifier:
http://dx.doi.org/10.1088/0031-8949/2009/T138/014032 in citations.
Clamping of solid tungsten components for the bulk W divertor row in JET precautionary design for a brittle material
Clamping of solid tungsten components for the bulk W divertor row in JET precautionary design for a brittle material
For the bulk tungsten divertor row, a development for the ITER-like wall in JET, utmost care was taken to limit the stresses in the solid tungsten plasma-facing components. The bulk W tile is located at the position of the outer strike point for most envisaged plasma configurations. The absence of a...
Saved in:
Personal Name(s): | Mertens, Ph. |
---|---|
Philipps, V. / Pintsuk, G. / Uytdenhouwen, I. / Samm, Ulrich | |
Contributing Institute: |
Plasmaphysik; IEK-4 |
Published in: | Physica scripta, T138 (2009) S. 014032 |
Imprint: |
Bristol
IoP Publ.
2009
|
Physical Description: |
014032 |
DOI: |
10.1088/0031-8949/2009/T138/014032 |
Document Type: |
Journal Article |
Research Program: |
Fusion |
Series Title: |
Physica Scripta Topical Issue
T138 |
Subject (ZB): | |
Publikationsportal JuSER |
For the bulk tungsten divertor row, a development for the ITER-like wall in JET, utmost care was taken to limit the stresses in the solid tungsten plasma-facing components. The bulk W tile is located at the position of the outer strike point for most envisaged plasma configurations. The absence of active cooling makes temperature cycling of the refractory tungsten material close to or through the ductile-to-brittle transition temperature (about 200-300 degrees C) and above the recrystallization threshold around 1250 degrees C hardly avoidable.The clamping concept is aimed at subjecting tungsten exclusively to compression forces. Each tile is segmented in stacks of 24 solid lamellae. The vertical clamping forces and the compressive preload for the stack integrity generate uniform pressures < 6-20MPa. Loads resulting in higher forces were deliberately moved to the supporting structure. The goal of minimizing tensile stresses in tungsten was achieved to the greatest extent, which results in thermo-mechanical values below 150MPa. |