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Mechanical support concept of the DEMO breeding blanket

Bachmann, C.; Gliss, C.; Härtl, T.; Hernandez, F. 1; Maione, I.; Steinbacher, T.; Vizvary, Z.
1 Karlsruher Institut für Technologie (KIT)


The DEMO tokamak architecture is based on large vertical breeding blanket (BB) segments that are accessed from a maintenance hall above the tokamak and are vertically replaced through large upper ports of the vacuum vessel (VV). The feasibility of the BB segments mechanical supports is a prerequisite of this vertical segment architecture. Their design directly impacts on the removal kinematics and the remote handling operations required for release and engagement. The supports must withstand large forces acting on the BB in particular due to electromagnetic (EM) loads. At the same time, they must ensure a sufficiently precise positioning of the BB first wall. Their design also takes into account the significant thermal expansion of the blanket segments that are operated at high temperature avoiding excessive support reaction forces.

The BB support concept described in this article does not require fasteners or electrical straps to the VV and therefore much reduces the complexity of the BB remote replacement – a valuable characteristic that would make this concept a milestone in meeting one of the goals defined for the DEMO project: to develop a maintainable fusion power plant design [1].
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Verlagsausgabe §
DOI: 10.5445/IR/1000137729
Veröffentlicht am 22.09.2021
DOI: 10.1016/j.fusengdes.2021.112840
Zitationen: 1
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Geographie und Geoökologie (IFGG)
Institut für Neutronenphysik und Reaktortechnik (INR)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 0920-3796, 1873-7196
KITopen-ID: 1000137729
HGF-Programm 31.13.01 (POF IV, LK 01) Ex-Vessel Plant Systems & Engineering
Erschienen in Fusion Engineering and Design
Verlag Elsevier
Band 173
Seiten Art.-Nr.: 112840
Nachgewiesen in Dimensions
Web of Science
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