Abstract
Abstract The research carried out over the past years within the Breeding Blanket (BB) project has demonstrated the importance of considering electromagnetic (EM) loads for the structural assessment of BB segments and the design of some interface components (e.g. attachment system with VV). These loads act on the structure during normal and off-normal operation and their distribution and magnitude strongly depend on the tokamak magnetic configuration, BB segment design and its electrical connections with the other conductive structures, as well as on the considered plasma scenario. The following work focuses on the Helium Cooled Pebble Bed (HCPB) BB. It reports an update of the electromagnetic loads for the DEMO2017 baseline during the plasma flat top and a VDE-up with a current quench time of 74 ms. Ferromagnetic and Lorentz loads (comprehensive of halo current contribution) have been calculated using an ANSYS FEM model. The obtained results are compared with the previous one (DEMO2015 baseline), showing the impact due to the change in the HCPB design and electrical contacts with the VV.
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