(2016) Coupled FEM-DBEM approach on multiple crack growth in cryogenic magnet system of nuclear fusion experiment 'Wendelstein 7-X'. Frattura ed Integrità Strutturale 26: 92–103.Ĭitarella R, Lepore M, Perrella M, et al. (2013) Coupled FEM-DBEM method to assess crack growth in magnet system of Wendelstein 7-X. (2015) Detailed design of the large-bore 8T superconducting magnet for the NAFASSY test facility. FEM-DBEM approach to analyse crack scenarios in a baffle cooling pipe undergoing heat flux from the plasma. The aim of this study is to assess the most dangerous initial crack configurations in one of the most critical baffles by using numerical models based on a FEM-DBEM approach.Ĭitation: R. Due to heat load cycles occurring during each Operational Phase (OP), thermal stresses are generated in the heat sinks, braze root and cooling pipes, capable to drive fatigue crack-growth and, possibly, a water leak through the pipe thickness. After the assembly process of heat shields and baffles, several cracks were found in the braze and cooling pipes. The water-cooled Plasma Facing Components (PFC) protect the Plasma Vessel (PV) against radiative and convective heat from the plasma. Wendelstein 7-X is the world’s largest nuclear fusion experiment of stellarator type, in which a hydrogen plasma is confined by a magnet field generated with external superconducting coils, allowing the plasma to be heated up to the fusion temperature.
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