EU-DEMO TF WP4 Coil Current Discharge Thermalhydraulical Analyses and Models: Impact of Radial Plates on the Operation Domain with Safety Consideration

Abstract In the framework of EU-DEMO superconducting magnets cryogenics and thermalhydraulical analyses, the FAOW-STREAM model developed (CEA/IRFM) has been used to predict the behaviour of TFC WP4 coils (ITER like design with radial plates) in the case of a Fast current Safety Discharge (FSD). This FAOW-STREAM model has already been partly validated by WEST TFC quench and JT-60SA TFC FSD analyses. The paper presents the implementation of the model and calculation inputs, the outcome and results, in particular the increase of helium pressure and temperature (in the coil itself and in exhaust relief circuit), and main conclusion showing effects in the operation domain, in particular a potential quench induced (and at which current) and safety considerations.