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Heterogeneous design and mechanical analysis of HELIAS 5-B helium-cooled pebble bed breeding blanket concept

Bongiovì, Gaetano; Marra, Giovanni; Mozzillo, Rocco; Tarallo, Andrea

Abstract:
One of the most challenging objectives of the European research concerning nuclear fusion technology, promoted by the EUROfusion consortium, is to bring stellarator-type nuclear fusion devices to maturity. To this purpose, studies on a large HELIcal-axis advanced stellarator (HELIAS), extrapolated from Wendelstein 7-X and based on a 5-fold symmetry (HELIAS 5-B), are currently ongoing. The HELIAS 5-B stellarator reactor will be endowed with a breeding blanket (BB) system to allow for the self-sustainability of the nuclear fusion reaction and make it suitable for electricity generation. In this paper, we present the first ever heterogeneous mechanical design and the preliminary structural assessment of a bean-shaped ring of a HELIAS 5-B BB sector. The proposed mechanical design, which is based on the helium-cooled pebble bed (HCPB) BB concept and developed according to the “sandwich” architecture, foresees an actively cooled segment box connected to a back-supporting structure equipped with manifolds. The internal region (breeding zone) is reinforced by actively cooled steel plates. The proposed heterogeneous design was checked against nominal loads and an in-box loss of coolant accidental scenario, which is a typical design driver for BBs. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000140107
Veröffentlicht am 17.11.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Neutronenphysik und Reaktortechnik (INR)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 0363-907X, 1099-114X
KITopen-ID: 1000140107
HGF-Programm 31.13.04 (POF IV, LK 01) In Vessel Components
Erschienen in International journal of energy research
Verlag John Wiley and Sons
Vorab online veröffentlicht am 13.10.2021
Nachgewiesen in Web of Science
Scopus
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