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Numerical Simulation of the Solid Particle Sedimentation and Bed Formation Behaviors Using a Hybrid Method

Sheikh, Md Abdur Rob; Liu, Xiaoxing; Matsumoto, Tatsuya; Morita, Koji; Guo, Liancheng; Suzuki, Tohru; Kamiyama, Kenji

Abstract:
In the safety analysis of sodium-cooled fast reactors, numerical simulations of various thermal-hydraulic phenomena with multicomponent and multiphase flows in core disruptive accidents (CDAs) are regarded as particularly difficult. In the material relocation phase of CDAs, core debris settle down on a core support structure and/or an in-vessel retention device and form a debris bed. The bed’s shape is crucial for the subsequent relocation of the molten core and heat removal capability as well as re-criticality. In this study, a hybrid numerical simulation method, coupling the multi-fluid model of the three-dimensional fast reactor safety analysis code SIMMER-IV with the discrete element method (DEM), was applied to analyze the sedimentation and bed formation behaviors of core debris. Three-dimensional simulations were performed and compared with results obtained in a series of particle sedimentation experiments. The present simulation predicts the sedimentation behavior of mixed particles with different properties as well as homogeneous particles. The simulation results on bed shapes and particle distribution in the bed agree well with experimental measurements. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000129594
Veröffentlicht am 10.02.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Thermische Energietechnik und Sicherheit (ITES)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 1996-1073
KITopen-ID: 1000129594
HGF-Programm 32.01.12 (POF III, LK 01) Transmutation:Sicherheitsanal.u.Studien
Erschienen in Energies
Verlag MDPI
Band 13
Heft 19
Seiten Art.-Nr. 5018
Vorab online veröffentlicht am 24.09.2020
Schlagwörter hybrid simulation method; multi-fluid model; discrete element method, sedimentation, bed formation
Nachgewiesen in Scopus
Web of Science
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