Fabrication and factory acceptance test of ITER UPSE installation tool

The ITER upper port stub extension (UPSE) which is welded on the upper position of the vacuum vessel (VV) is classified into 2 categories; one is called as the central (even) UPSE which is welded at upper central position of the VV sector at factory. The other is called as the lateral (odd) UPSE which is welded at upper lateral position of the VV sector. The central UPSE is welded at factory before delivery, but the lateral UPSE is welded after whole nine VVs welded in Tokamak pit. The final design including analysis considering design factor and mock-up test for the lateral UPSE assembly have been developed by the Korean domestic agency (KODA). For the final welding between UPSE and VV, alignment system to adjust the UPSE to its final position is also required to meet the functional requirements requested by IO-CT (ITER Organization Central Team). For the verification of the final design to check alignment system and traveling mechanism, a full scaled mock-up was fabricated and tested according to the technical requirement of the UPSE installation tool [8,9]. In this paper, the structural analysis to verify the structural integrity according to Machinery Directive and factory acceptance test (FAT), full load test to check the maximum bending deflection in the worst case, will be introduced.