Parametric Analysis of the ITER TF Fast Discharge Using the 4C Code

The recently developed and validated 4C code is used to analyse the fast discharge of an ITER TF coil, including the cooling circuits of winding and casing, and the quench venting system. The analysis shows that a quench can be initiated by the fast discharge, depending on the value of the thermal resistance of the conductor turn insulation. Eddy currents heat the structures and these transfer the heat especially to the side pancakes, where the quench is initiated. The hot spot temperature remains below ~37 K in the winding and ~55 K in the structures. The peak pressurization in the winding remains below ~8.5 MPa.