Overview of the ITER Tokamak complex building and integration of plant systems toward construction

The ITER Tokamak complex consists of Tokamak, diagnostic and tritium buildings. The Tokamak machine is located in the bio-shield pit of the Tokamak building. Plant systems are implemented in the three buildings and are strongly interfacing with the Tokamak The reference baseline (3D) configuration is a set of over 1000 models that today defines in an exhaustive way the overall layout of Tokamak and plant systems, needed for fixing the interfaces and to complete the construction design of the buildings. During the last two years, one of the main ITER challenges was to improve the maturity of the plant systems layout in order to confirm their integration in the building final design and freeze the interface definitions in-between the systems and to the buildings. The paper gives an overview of the final configuration of the ITER nuclear buildings and highlights the large progress made on the final integration of the plant systems in the Tokamak complex. The revised design of the Tokamak machine supporting system is also described.