An innovative diverter concept for a thermonuclear fusion reactor is being studied at the Institute for Advanced Materials of the Joint Research Centre of the European Communities. It is made of a single material, an ultrahigh thermal conductivity carbon fiber reinforced graphite (CFC) composite; the coolant is helium gas. When looking at the new diverter concept, it is necessary to make several numerical calculations in order to investigate the influence of the various parameters to be optimized. This paper shows a new numerical procedure which has been developed to avoid a complete 3D-calculation.
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