Design definition of the K-DEMO in-vessel blanket arrangement, blanket sector maintenance details and upper lever RM enclosure

Abstract A number of blanket arrangements and maintenance options are being investigated within various fusion DEMO studies. The defined segmentation, general arrangement and maintenance approach for the vacuum vessel blankets has a major impact on the overall device configuration. The K-DEMO blanket arrangement is centered on an approach to minimize the number of blanket segments that are accessed through vertical maintenance ports. Minimizing the segment number reduces the number of piping services that interface with it and exit the vacuum vessel. The defined design of interfacing components was made to enhance this plan. Concept design details of the prescribed K-DEMO machine configuration have evolved in sufficient detail to allow the merits (or shortcomings) of this design approach to be evaluated with respect to other blanket segmentation and maintenance options. Coupled with the designed in-vessel blanket arrangement and maintenance approach a conceptual design of an intermediary maintenance enclosure above the machine core has been developed to interface, handle and move a blanket sector from the device core through the vertical ports without using an individual cask enclosure located at each vertical port opening. The results of this activity along with an overview of the latest K-DEMO general arrangement will be presented.