Neutronics modeling of bubbles in bubbly flow regime in boiling water reactors

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dc.contributor.authorTurkmen, Mehmet
dc.contributor.authorTiftikci, Ali
dc.date.accessioned2025-03-23T19:39:13Z
dc.date.available2025-03-23T19:39:13Z
dc.date.issued2019
dc.departmentSinop Üniversitesi
dc.description.abstractThis study mainly focused on the neutronics modeling of bubbles in bubbly flow in boiling water reactors. The bubble, ring and homogenous models were used for radial void fraction distribution. Effect of the bubble and ring models on the infinite multiplication factor and two-group flux distribution was investigated by comparing with the homogenous model. Square pitch unit cell geometry was used in the calculations. In the bubble model, spherical and non-spherical bubbles at random positions, sizes and shapes were produced by Monte Carlo method. The results show that there are significant differences among the proposed models from the viewpoint of physical interaction mechanism. For the fully-developed bubbly flow, k(inf) is overestimated in the ring model by about 720 +/- 6 pcm with respect to homogeneous model whereas underestimated in the bubble model by about -65 +/- 9 pcm with a standard deviation of 15 pcm. In addition, the ring model shows that the coolant must be separated into regions to properly represent the radial void distribution. Deviations in flux distributions principally occur in certain regions, such as corners. As a result, the bubble model in modeling the void fraction can be used in nuclear engineering calculations. (C) 2019 Korean Nuclear Society, Published by Elsevier Korea LLC.
dc.identifier.doi10.1016/j.net.2019.02.020
dc.identifier.endpage1250
dc.identifier.issn1738-5733
dc.identifier.issue5
dc.identifier.scopus2-s2.0-85067924136
dc.identifier.scopusqualityQ1
dc.identifier.startpage1241
dc.identifier.urihttps://doi.org/10.1016/j.net.2019.02.020
dc.identifier.urihttps://hdl.handle.net/11486/6291
dc.identifier.volume51
dc.identifier.wosWOS:000473127300006
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherKorean Nuclear Soc
dc.relation.ispartofNuclear Engineering and Technology
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20250323
dc.subjectBubble model
dc.subjectRing model
dc.subjectHomogenous model
dc.subjectVoid fraction
dc.subjectBubbly flow
dc.subjectMCNP
dc.titleNeutronics modeling of bubbles in bubbly flow regime in boiling water reactors
dc.typeArticle

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