Two-temperature homogenized model for steady-state and transient thermal analyses of a pebble with distributed fuel particles

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dc.contributor.authorCho, Nam-Zinko
dc.contributor.authorYu, Huiko
dc.contributor.authorKim, Jong Woonko
dc.date.accessioned2013-08-08T03:40:54Z-
dc.date.available2013-08-08T03:40:54Z-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.issued2009-05-
dc.identifier.citationANNALS OF NUCLEAR ENERGY, v.36, no.4, pp.448 - 457-
dc.identifier.issn0306-4549-
dc.identifier.urihttp://hdl.handle.net/10203/174245-
dc.description.abstractIn a pebble-bed type very high temperature gas-cooled reactor (VHTGR). a typical fuel pebble consists of over ten thousand five-layer TRISO particles in a graphite-matrix. The high heterogeneity in composition leads to difficulty in explicit thermal calculation of pebble fuels. Thus, a homogenization model becomes essential. Currently, a simple volumetric-average thermal conductivity approach is used. However, this approach is non-conservative and underestimates the fuel temperature. In this paper, we describe a homogenization model that is not only easy to implement but also gives a more realistic temperature distribution in a fuel pebble, providing the fuel-kernel and graphite-matrix temperatures separately. Steady-state and transient thermal analyses are performed using the homogenization model, and the point kinetics model is then coupled with the homogenization model to incorporate fuel-kernel temperature feedback. (C) 2008 Elsevier Ltd. All rights reserved.-
dc.languageEnglish-
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD-
dc.subjectGEOMETRY-
dc.titleTwo-temperature homogenized model for steady-state and transient thermal analyses of a pebble with distributed fuel particles-
dc.typeArticle-
dc.identifier.wosid000265337600004-
dc.identifier.scopusid2-s2.0-62349117144-
dc.type.rimsART-
dc.citation.volume36-
dc.citation.issue4-
dc.citation.beginningpage448-
dc.citation.endingpage457-
dc.citation.publicationnameANNALS OF NUCLEAR ENERGY-
dc.identifier.doi10.1016/j.anucene.2008.11.031-
dc.contributor.localauthorCho, Nam-Zin-
dc.type.journalArticleArticle-
dc.subject.keywordPlusGEOMETRY-
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