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dc.contributor.authorHwang, Gisuk
dc.contributor.authorKaviany, Massoud
dc.contributor.authorMoriyama, Kiyofumi
dc.contributor.authorPark, Hyun Sun
dc.contributor.authorHwang, Byoungcheol
dc.contributor.authorLee, Mooneon
dc.contributor.authorKim, Eunho
dc.contributor.authorPark, Jin Ho
dc.contributor.authorNasersharifi, Yahya
dc.identifier.citationHwang, Gisuk; Kaviany, Massoud; Moriyama, Kiyofumi; Park, Hyun Sun; Hwang, Byoungcheol; Lee, Mooneon; Kim, Eunho; Park, Jin Ho; Nasersharifi, Yahya. 2016. FARO tests corium-melt cooling in water pool: roles of melt superheat and sintering in sediment. Nuclear Engineering and Design, vol. 305, 15 August 2016:pp 569–581en_US
dc.descriptionClick on the DOI link to access the article (may not be free).en_US
dc.description.abstractThe FARO tests have aimed at understanding an important severe accident mitigation action in a light water reactor when the accident progresses from the reactor pressure vessel boundary. These tests have aimed to measure the coolability of a molten core material (corium) gravity dispersed as jet into a water pool, quantifying the loose particle diameter distribution and fraction converted to cake under range of initial melt superheat and pool temperature and depth. Under complete hydrodynamic breakup of corium and consequent sedimentation in the pool, the initially superheated corium can result in debris bed consisting of discrete solid particles (loose debris) and/or a solid cake at the bottom of the pool. The success of the debris bed coolability requires cooling of the cake, and this is controlled by the large internal resistance. We postulate that the corium cake forms when there is a remelting part in the sediment. We show that even though a solid shell forms around the melt particles transiting in the water pool due to film-boiling heat transfer, the superheated melt allows remelting of the large particles in the sediment (depending on the water temperature and the transit time) using the COOLAP (Coolability Analysis with Parametric fuel-cooant interaction models) code. With this remelting and its liquid-phase sintering of the non-remelted particles, we predict the fraction of the melt particles converting to a cake through liquid sintering. Our predictions are in good agreement with the existing results of the FARO experiments. We address only those experiments with pool depths sufficient/exceeding the length required for complete breakup of the molten jet. Our analysis of the fate of molten corium aimed at devising the effective scenarios for its safe cooling in the containment so that predicted the minimum pool depth for no cake formation as functions of the melt superheat and water (subcooled/saturation) temperatures.en_US
dc.description.sponsorshipNational Research Foundation of Korea (NRF) under grants by the Korean Government (MSIP, NRF-2013M2A8A1040987), and by the Department of Mechanical Engineering, Wichita State University, USA.en_US
dc.publisherElsevier B.V.en_US
dc.relation.ispartofseriesNuclear Engineering and Design;v.305
dc.subjectCoolant interactionsen_US
dc.subjectDebris beden_US
dc.titleFARO tests corium-melt cooling in water pool: roles of melt superheat and sintering in sedimenten_US
dc.rights.holder(C) 2016 Elsevier B.V. All rights reserved.en_US

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