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Developments Toward Fully Metallic Actively Cooled Plasma-Facing Components for the Tungsten Divertor in ITER

X. Courtois, M. Firdaouss, P. Gavila, M. Missirlian, M. Richou, D. Serret, J. Bucalossi, A. Grosman, Th. Loarer, Ph. Magaud

Fusion Science and Technology / Volume 64 / Number 4 / November 2013 / Pages 727-734

Technical Paper

The evolution toward fully metallic plasma-facing components (PFCs) involves new major challenges in fusion research. For more than 20 years, CEA has focused its experimental studies on actively cooled carbon PFCs. Now, a new step has been taken with the integration of recent technology and physics knowledge for the foreseen implementation of a full-tungsten divertor in Tore Supra (the WEST project) in support of the ITER divertor strategy. To that purpose, various studies dealing with the W environment have been carried out during the past 2 years: analysis of thermal fatigue testing on the latest monoblock designed for ITER divertor targets, including repaired ones; component surface shaping that withstands local particle flux and the effect of leading edges; cumulated transient and steady-state heat loads and their link with the issue of W recrystallization; and acoustic monitoring of the component cooling regimes to prevent critical heat flux events.

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