Electromagnetic and structure analysis for EAST vacuum vessel with plasma facing components during VDE

Experimental Advanced Superconducting Tokamak (EAST) is a superconducting magnet tokamak and its goal is to achieve the magnetic confinement fusion. The major plasma disruption (MD) or the vertical displacement event (VDE) all will produce toroidal eddy current in the vacuum vessel (VV) with plasma facing components (PFCs) and cause mechanical forces, which represent one of the most vital loads for tokamak. This paper is focused on calculational methods and results for the electromagnetic loads on the simplified but practical model of EAST VV with PFCs respect to VDE scenarios based on outputs from DINA, which are one of major sources of electromagnetic loads on VV and PFCs. Commercial finite element method software, ANSYS, was employed to evaluate the eddy current on the VV and PFCs modules with the 22.5° sector model for major conducting structure of the tokamak. As the results of calculating the eddy currents and electromagnetic forces, stress and deformation on EAST VV with PFCs can be obtained. According to the analysis results, some advices to more effectively protect EAST vacuum vessel and PFCs from being destroyed in VDE is given out.