Computational fluid dynamics analysis of an open-pool nuclear research reactor core for fluid flow optimization using a channel box

dc.creatorSCURO, N.L.
dc.creatorANGELO, G.
dc.creatorANGELO, E.
dc.creatorPIRO, M.H.A.
dc.creatorUMBEHAUN, P.E.
dc.creatorTORRES, W.M.
dc.creatorANDRADE, D.A.
dc.date2023
dc.date2023-05-18T14:33:02Z
dc.date2023-05-18T14:33:02Z
dc.date.accessioned2023-09-28T14:26:02Z
dc.date.available2023-09-28T14:26:02Z
dc.identifier0029-5639
dc.identifierhttp://repositorio.ipen.br/handle/123456789/34060
dc.identifier6
dc.identifier197
dc.identifier10.1080/00295639.2022.2142437
dc.identifier0000-0002-6689-3011
dc.identifier36.8
dc.identifier50
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/9004269
dc.descriptionA channel box installation in the IEA-R1 research reactor core was numerically investigated to increase fluid flow in fuel assemblies (FAs) and side water channels (SWCs) between FAs by minimizing bypasses in specific regions of the reactor core, which is expected to reduce temperatures and oxidation effects in lateral fuel plates (LFPs). To achieve this objective, an isothermal three-dimensional computational fluid dynamics model was created using Ansys CFX to analyze fluid flow distribution in the Brazilian IEA-R1 research reactor core. All regions of the core and realistic boundary conditions were considered, and a detailed mesh convergence study is presented. Results comparing both scenarios are presented in the percentage of use of the primary circuit pump. It is indicated that 21.4% of fluid bypass to unnecessary regions can be avoided with the channel box installation, which leads to the total mass flow from the primary circuit for all FAs increasing from 68.9% (without a channel box) to 77.6% (with a channel box). For the SWCs, responsible for cooling LFPs, an increment from 9.7% to 22.4%, avoiding all nondesired cross three-dimensional effects, was observed, resulting in a more homogeneous fluid flow and vertical velocities. It was concluded that the installation of a channel box numerically indicates an expressive mass flow increase and homogeneous fluid flow distribution for flow dynamics in relevant regions. This gives greater confidence to believe that lower temperatures, and consequently oxidation effects in LFPs, can be expected with a channel box installation.
dc.descriptionInstituto de Pesquisas Energ??ticas e Nucleares (IPEN)
dc.descriptionNatural Sciences and Engineering Research Council of Canada (NSERC)
dc.descriptionIPEN: 01341.000396/2018
dc.descriptionNSERC: 950-231328
dc.format1100-1116
dc.relationNuclear Science and Engineering
dc.rightsopenAccess
dc.subjectcomputer codes
dc.subjectfluid mechanics
dc.subjectreactor cores
dc.subjectdistribution
dc.subjectfluid flow
dc.titleComputational fluid dynamics analysis of an open-pool nuclear research reactor core for fluid flow optimization using a channel box
dc.typeArtigo de peri??dico
dc.coverageI


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