The Influence of Plasma Current Evolutions on Eddy Currents and Dynamic Loads in ITER Structure Elements. Modeling Initial Data for Vibration and Dynamics Analysis

摘要

During operation of a fusion reactor the multiple fast Plasma processes occur, leading to eddy currents generation in conducting parts of the machine, heating of its structure and large dynamic loads resulting from the interaction of eddy currents and magnetic fields. Several codes were successfully elaborated to solve the problem of eddy currents and resulting effects. Here the code ISTRA-VIKHR and some modeling results of the influence of complex "fast" Plasma disruption on elements of ITER structure option are presented. The code models thin 3-D conducting shells in well-known approach. The special features of ISTRA-VICHR are the multiple-option interface with Plasma-physical code DINA, and the universal approach to the modeling both eddy currents and Plasma- and Halo-currents, both poloidal and toroidal distributions. The resulting time histories of currents, fields, and forces in each finite element are written as inputs to the codes analyzing vibrations and dynamics of the machine's structure elements. The results of simulation of processes in ITER Vacuum Vessel during 1000 ms Plasma operation are presented. The eddy currents and dynamic loads in ITER structure elements are calculated.