Design and Analysis Progress of US ITER Diagnostic Upper Port #14

ITER is the world’s largest fusion device currently under construction in the South of France with >50 diagnostic systems to be installed inside the port plugs (PPs), the interspace (IS), or the port cell (PC) region of various diagnostic ports. Four tenant diagnostic systems will be integrated into the upper port 14 (U14), the upper wide angle viewing system, the disruption mitigation system, the glow discharge cleaning (GDC) system and the plasma position reflectometry, an ex-vessel tenant installed in the U14 IS region. Multiphysics analyses were performed for an in-vessel and ex-vessel component design integration following the ITER port integration requirements and the ITER guideline for load specification. Electromagnetic (EM), inertial, and heating loads of the main U14 components under various conditions for the diagnostic shield module (DSM) and its internal shielding block attachment design have been summarized. The structural design of in-port components is based on an optimization of the EM load distribution to limit the load impact to the diagnostic first wall and the tenant diagnostics and to mitigate the effect of dynamic amplification from asymmetric plasma vertical displacement event inertial loads. The DSM needs to provide a sufficient stiffness for the protection of onboard diagnostics and structural integrity of the port integration under the design-driving EM and inertial loads. The in-port diagnostics and mounting supports, on the other hand, are designed to meet the remote handling requirement, while taking into account the thermal loads due to temperature gradient from nuclear heating, as well as matching the relative stiffness among the structural components within the port assembly. Progress on an integrated design and analysis is reported including a seismic analysis of the IS/PC region for extracting tenant interface loads. The design-driving loads for tenant systems are presented for the attachment structure design as part of the PP engineering tasks.