Progress on the integration of ITER diagnostics equatorial port plugs in Europe

Neutronic analysis of the ITER Equatorial Port Plug 1

“…The Equatorial Port Plug of the original model has been completely removed and the three-drawers structure with the 100% SS (SS-316) framework containing them has been described. Inside each drawer a three layer shielding structure (70% SS/30% water for the 1st layer, 30% SS/70% water for the 2nd and 3rd layers) has been assumed, according to a structural analysis previously performed [2], while 100% SS walls have been modeled for the side drawers. All the planes surrounding the Equatorial Port have been shifted to define a 20 mm straight gap surrounding the Port itself.…”

“…1) and its feasibility is under investigation: it is based on a modular structure with three independent vertical drawers in which the diagnostic systems have to be rearranged and integrated. In this frame, several analyses are ongoing in order to verify the impact of the rearrangement of the diagnostics in the drawers on the diagnostics performances and the effectiveness of the new Port Plug concept in terms of shielding capability [2]. The paper describes the results of three-dimensional neutronic analyses performed in support of the EPP1 design validation.…”