The ITER tokamak, like all tokamaks, can experience disruptions: large scale MHD instabilities which quench the current and magnetic field. At the same time, electromagnetic forces are produced on conducting structures surrounding the plasma.
In this work, a thin conducting shell model is developed to calculate these forces. A theory is derived for the dependence of the wall force on plasma current and on the wall constant, which is the time required for the magnetic field to penetrate the wall. The scaling of the wall force is compared with simulations and experimental data [1] and is in reasonable agreement.

The simulations were done with the M3D extended MHD code [2]. A double resistive wall was implemented to model the effect of the ITER blanket which surrounds the plasma. The disruptions are produced by resistive wall modes or external kink modes.
Numerically, the study of disruptions is very challenging. In the M3D extended MHD code, dealiasing was applied in the toroidal direction.
Advection terms were treated with a numerical upwind method. These techniques were adequate to provide sufficient numerical smoothing to simulate entire disruption events.