6533b85cfe1ef96bd12bc0ec

RESEARCH PRODUCT

Initial layout of DEMO buildings and configuration of the main plant systems

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Abstract The realization of a Demonstration Fusion Power Reactor (DEMO) to follow ITER, with the capability of generating several hundred MW of net electricity and operating with a closed fuel-cycle is viewed by Europe and many of the nations engaged in the construction of ITER as the remaining crucial step towards the exploitation of fusion power. The development of suitable configurations of plant systems inside the tokamak building to allow for the various maintenance operations and to meet the numerous system operating functions and safety requirements is one of the initial priorities. A task to establish an initial layout of the DEMO buildings and the integration of the main plant systems was launched by EUROfusion with an industrial partner with experience in the construction of nuclear power plants. This paper provides an overview of the main plant systems to be integrated in the tokamak building including requirements due to their prescribed functions as well as from the overall safety and maintenance approach. These are transferred into layout requirements such as the need for separation of certain components, fire zones, access zoning, etc. In addition, the design requirements for the building itself are summarized. Some considerations of the lesson being learnt from ITER design and construction experience are provided too.