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Shielding Design Optimization of the Helium-Cooled Pebble Bed Breeding Blanket for the EU DEMO Fusion Reactor

Palermo, Iole ; Hernández, Francisco A. 1; Pereslavtsev, Pavel 1; Rapisarda, David; Zhou, Guangming 1
1 Institut für Neutronenphysik und Reaktortechnik (INR), Karlsruher Institut für Technologie (KIT)

Abstract:

The helium-cooled pebble bed (HCPB) breeding blanket (BB) is one of the two driver-blanket candidates for the European DEMO fusion reactor. Recent design activities were focused, among other objectives, on the achievement of an efficient shielding system to adequately protect the vacuum vessel (VV) and toroidal field coils (TFCs). Several shielding options have been studied in terms of architecture (e.g., in-BB shield and ex-BB shield) and materials (e.g., B$_{4}$C, WC, WB, YHx, and ZrHx). In this study, the B$_{4}$C material was selected as the most attractive option considering not only shielding performance but also availability, industrialization, experience, and cost factors. Subsequently, we performed a parametric study by implementing different thicknesses of a B$_{4}$C external shield and reporting information of its effect on shielding performance, structural behavior, swelling and tritium breeding. Furthermore, a detailed structure for the VV was developed considering an internal layered configuration comprising steels/water with different boron contents. Corresponding shielding analyses were conducted regarding influence on neutron attenuation when implementing such a VV structure for both the baseline consolidated design of the HCPB and one of the previously developed and improved BSS configurations. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000150414
Veröffentlicht am 06.09.2022
Originalveröffentlichung
DOI: 10.3390/en15155734
Scopus
Zitationen: 4
Web of Science
Zitationen: 3
Dimensions
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Neutronenphysik und Reaktortechnik (INR)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 1996-1073
KITopen-ID: 1000150414
HGF-Programm 31.13.01 (POF IV, LK 01) Ex-Vessel Plant Systems & Engineering
Erschienen in Energies
Verlag MDPI
Band 15
Heft 15
Seiten Art.Nr. 5734
Vorab online veröffentlicht am 07.08.2022
Nachgewiesen in Dimensions
Web of Science
Scopus
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