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Abstract

Since 1992, reliable High Heat Flux PFCs based on copper alloy heat sink structures and a CFC armour have been developed. The final result is an actively cooled high heat flux element that is capable of removing up to 10 MW.m{-2} in stationary operating conditions. About 600 of these high performance individual components have than been manufactured and assembled in order to equip a Toroidal Pump Limiter (TPL). This major in-vessel component consists of a flat toroidal continuous disk (R(i)=2.2m, R(e)=2.7m) covering a 7.6 m{2} area and made of 574 radial high heat flux elements called �fingers�. Following a first successful manufacture of 200 �short finger elements� dedicated to RF antenna limiters; the fabrication of actively cooled long finger elements required for the TPL was launched in 1997 in the framework of CIEL Project. Although some issues appeared during series fabrication, requiring repair processes to be developed, the final deliveries was successfully achieved end of 2001.

THe paper deals with the experience feedback build-up along the four years duration of the components manufacture. We will show where issues were encountered, how solutions were found to achieve the fabrication of components and will highlight what are them main technical lessons to be learned: acceptance criteria, choice of materials margins of processes. Finally a proposal of an alternative optimized design is presented, fruit of the experience gained from this up to now, unique series manufacture of actively cooled plasma facing HHF components. We believe that such experience will certainly be of use to ITER as well as to Wendetstein 7-X as far as PFC is concerned.

Additional information

Authors: CORDIER J J, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);BAYETTI P, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);CHAPPUIS PH, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);DUROCHER A, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);ESCOURBIAC F, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);GROSMAN A, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);LIPA M, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);MITTEAU R, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);SCHLOSSER J, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);VAN HOUTTE D, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: An article published in: 20th IEEE/NPSS Symposium on Fusion Engineering (SOFE2003)
Availability: This article is available from CEA Caderache: http://www.cea.fr/fr/actualites/librairie.htm
Record Number: 200417415 / Last updated on: 2004-02-24
Category: PUBLICATION
Original language: en
Available languages: en