Abstract
Abstract The TITAN reactors are compact, high-neutron-wall-loading fusion power reactors based on the reversed-field-pinch confinement concept. The compact design of the TITAN fusion power core (FPC) reduces the system to a few small and relatively low-mass components, making the toroidal segmentation of the FPC unnecessary. Therefore, a “single-piece” FPC maintenance procedure, in which the first wall and the blanket are removed and replaced as a single unit, is possible. This unique approach permits the complete FPC to be made of a few factory-fabricated pieces, assembled on site into a single torus, and tested to full operational conditions before installation in the reactor vault. The low cost of the FPC means a complete, “ready-for-operation” unit can be kept on site for replacement in case of unscheduled events. All of these features are expected to improve the plant availability. This paper describes the plant layout for the TITAN reactors and their maintenance procedures. A comparison between single-piece maintenance and modular approaches is also given. An important advantage of the single-piece maintenance approach, pretesting the FPC to full operational limit, is also explored.
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