Application of Inelastic Method and Its Comparison with Elastic Method for the Assessment of In-Box LOCA Event on EU DEMO HCPB Breeding Blanket Cap Region

The Helium Cooled Pebble Bed (HCPB) breeding blanket, being developed by the Karlsruhe Institute of Technology (KIT) and its partners is one two driver blanket candidates to be selected for European demonstration fusion power plant (EU DEMO). in-box Loss Coolant Accident (LOCA) a postulated initiating event (BB) that must accounted within design basis. In this paper, BB cap region analyzed ability withstand an LOCA event. Initially, assessment performed using conventional elastic codes nuclear pressure vessels. However, it thought rules are not ‘equipped’ assess material damage modes which essentially inelastic. Therefore, non-linear inelastic analysis further better understand in material. Two predominant failure relevant addressed: exhaustion ductility plastic flow localization. While HCPB has been predominantly based on design-by-analysis studies, results from present study show may overly conservative given loading could lead inefficient designs. To our knowledge, first attempt investigate structural integrity DEMO blankets under conditions methods.