Engineering analyses of ITER divertor diagnostic rack design

•The approach developed early has been used for the assessment of new design of DTS racks and neutron shield units.•Results of most critical EM and seismic analyses indicate that introduced changes significantly improved the system behaviour under these loads.•However further research is required to finalize the design and check it upon meeting all structural, thermal, seismic, EM and fatigue requirements. The divertor port racks used as a support structure of the divertor Thomson scattering equipment has been carefully analyzed to be consistent with electromagnetic and seismic loads. It follows from the foregoing simulations that namely these analyses demonstrate critical challenges associated with the structure design. Based on the results of the reference structure [2] a modified design of the diagnostic racks is proposed and updated simulation results are given. The results signify a significant improvement over the previous reference layout and the design will be continued towards finalization.