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dc.contributor.authorHwang, Byoungcheol
dc.contributor.authorMoriyama, Kiyofumi
dc.contributor.authorHwang, Gisuk
dc.contributor.authorKaviany, Massoud
dc.contributor.authorLee, Mooneon
dc.contributor.authorKim, Eunho
dc.contributor.authorPark, Hyun Sun
dc.identifier.citationHwang, Byoungcheol; Moriyama, Kiyofumi; Hwang, Gisuk; Kaviany, Massoud; Lee, Mooneon; Kim, Eunho; Park, Hyun Sun. 2018. Sensitivity and uncertainty analyses of ex-vessel molten core cooling in a flooded cavity during a severe accident. Nuclear Engineering and Design, vol. 328:pp 121-133en_US
dc.descriptionClick on the DOI link to access the article (may not be free).en_US
dc.description.abstractSensitivity and uncertainty analyses of molten core cooling under the ex-vessel phase of a severe accident of a light water reactor was performed with the COOLAP-I (COOLability Analysis Program-I) model, a parametric model considering one-dimensional heat transfer of a porous debris particle bed, covering a broad range of phenomena from the melt jet release to the long-term cooling process. COOLAP-I improved the previous version by including particle generation by the fuel-coolant interaction (FCI), and internal heat generation by the decay heat. With nine representative input parameters, an uncertainty analysis using Latin hypercube sampling (LHS) method with 300 samples were conducted, and the cooling characteristics such as total enthalpy, maximum temperature, decay heat ratio, and cake (a lump of connected particles) fraction, were examined for the elapsed time of up to 50 h. This analysis demonstrates the impacts of the water pool depth, the jet breakup-related parameters, and the accumulation area of the debris particles on the cake formation by particle agglomeration and analyzes the long-term coolability of debris particle bed in plant scale conditions.en_US
dc.description.sponsorshipNuclear Safety Research Program through the Korea Foundation of Nuclear Safety (KOFONS), granted financial resource from the Nuclear Safety and Security Commission (NSSC), Republic of Korea (No. 1305008).en_US
dc.publisherElsevier Ltd.en_US
dc.relation.ispartofseriesNuclear Engineering and Design;v.328
dc.subjectEx-vessel coolabilityen_US
dc.subjectDebris particle beden_US
dc.subjectParticle agglomerationen_US
dc.subjectUncertainty analysisen_US
dc.subjectSevere accidenten_US
dc.subjectNuclear safetyen_US
dc.titleSensitivity and uncertainty analyses of ex-vessel molten core cooling in a flooded cavity during a severe accidenten_US
dc.rights.holder© 2017 Elsevier B.V. All rights reserved.en_US

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