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Effect of design geometry of the DEMO first wall on the plasma heat load

Bazylev, B.; Igitkhanov, Yu.; Boccaccini, L.V.

Abstract:
In this work we consider the effect of W armour surface shaping on the heat load otimization for the W/EUROFER DEMO sandwich type first wall (FW) blanket module with the water coolant. The most severe damage of the FW is expected during the transients and the run away electron (RE) impact. The W armour melting and melt splashing are expected under DEMO conditions, were the plasma stored energies are so high that could drive shallow melting on the top surfaces of armour. This impact may lead to modifications of surface topology and requires a three dimensional thermo-hydraulic analysis. For this purpose the ENDEP and 3D MEMOS codes are developed and verified against ILW JET experiments. To avoid excessive heating and consequent thermal erosion during the heat loads in DEMO I operation we profile the W armour surface. A parametric analysis has been carried out to assess the influence of geometrical and thermo-hydraulic parameters. The expected energy density deposition to the FW pannel armour surfaces during transients (ELMs), and the ranaway electrons in DEMO are much higher than expected in ITER [1]. The damage of tungsten castellat ... mehr


Zugehörige Institution(en) am KIT Institut für Neutronenphysik und Reaktortechnik (INR)
Publikationstyp Vortrag
Jahr 2015
Sprache Englisch
Identifikator KITopen ID: 230101706
HGF-Programm 31.03.06; LK 01
Erschienen in 17th International Conference on Fusion Reactor Materials, Aachen, October 12- 16, 2015
URLs Abstract (PDF)
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