Eddy Current Analysis of TF Coil Case for EAST

Plasma major disruptions and plasma vertical displacement events represent two extreme examples of fast transient electromagnetic processes, which will induce large current and electromagnetic loads that exceed those of loads during magnet normal operation and seismic loads. Eddy current and electromagnetic loads of the conducting structures need to be analyzed to verify the mechanical reliability of the tokamak during these transients. An integrated module, which consists of the mechanical design of the three-dimensional computer-aided design (CAD) solid modeling, generation of the finite element modeling, and external parameters input into the module, was integrated to perform the calculation of the electromagnetic loads and power losses. The developed integrated module can be used to calculate the Eddy current, electromagnetic forces, and power losses of the toroidal field (TF) coil-case for EAST tokamak during plasma disruptions and vertical displacement events. The simplified geometric model with 22.5° sector for EAST tokamak was used in view of the toroidal symmetry. The plasma current and position as functions of time are given by the numerical method. In this article, the module integration and evaluation of the electromagnetic loads and power losses on the conducting structures of the EAST tokamak by the finite element methods are described.