Design and qualification of components for high-temperature reactors

Abstract The status of development of the main components belonging to the HTR-M and the HTR-500 is described. Depending on the different design features of both reactor types, the main design activities and R&D efforts were directed to different components. But the activities together cover the whole range of components necessary for both projects. For instance, the graphitic core structures and main circulators of the HTR-500 and the HTR-M are of similar design, and the hot gas ducts and steam generators developed for the HTR-M are applicable to the HTR-500. In addition, the combined activities of KFA, HRB and Interatom were found to be very successful and economic.