Modelling of the stress-strain state of ITER upper ports ##02 & 08 constructions’ components under thermal, electromagnetic and seismic loads

Based on the fusion energy problem, this article shows results of the studies, which have been done to justify the current Upper port plug (UPP) of ITER upper ports No02 and No08 design. As for the previous UPP design, some structure elements were absent. ITER port plugs are supposed to be working under various types of loads. Particularly, these loads are thermal, inertial and electromagnetic (EM). Most of the ITER strength calculations are performed using finite element method (FEM). For example, UPP construction consists of many different parts, so it is necessary to consider their contact interaction. Nonlinear problem formulation has been used to obtain accurate results of the calculations. In addition, bolt pretension has been taken into account, that has not been considered in the previous version of the UPP design analysis. Firstly, results of thermo-hydraulic analysis illustrate the problem with the boron carbide (B4C) bricks during Baking mode in the UPP shielding. Secondly, load combination of seismic and EM loads show the UPP structure strength assessment. This article, in general, represents some results shown in the Structural Integrity Report and obtained during the process of the UPP design justification following ACC-MR code.