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Participation in the NEA/OECD MATiS-H Benchmark exercise. Study of spacer grids in a rod bundle

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Participation in the NEA/OECD MATiS-H Benchmark exercise. Study of spacer grids in a rod bundle

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dc.contributor.author Peña Monferrer, Carlos es_ES
dc.contributor.author Chiva Vicent, Sergio es_ES
dc.contributor.author Muñoz-Cobo González, José Luís es_ES
dc.contributor.author Vela, E.
dc.contributor.author Pelayo, F.
dc.date.accessioned 2016-10-10T09:22:44Z
dc.date.available 2016-10-10T09:22:44Z
dc.date.issued 2012-10
dc.identifier.uri http://hdl.handle.net/10251/71522
dc.description.abstract Nuclear fuel bundles contain spacers essentially for mechanical stability and to influence the flow dynamic and heat transfer phenomena along the fuel rods. This work presents the analysis of the turbulence effects of a split-type and swirl-type spacer grid geometries on single-phase in a PWR (Pressurized Water Reactor) rod bundle. Various Computational Fluid Dynamics (CFD) calculations have been performed and the results validated with the experiments of the OECD/NEA-KAERI Rod Bundle CFD Benchmark Exercise on Turbulent Mixing in a Rod Bundle with Spacers at the MATiS-H facility. The aim of this Benchmark is to provide validated CFD analysis tools providing a firm basis for quantifying the CHF Margin reliably for normal operation and operational transients conditions and allowing eventually the use of CMFD Codes for predicting DNB under accidental conditions [1]. Simulation of turbulent phenomena downstream of the spacer grid presents high complexity issues. A wide range of length scales are present increasing the difficulty of defining in detail the transient nature of turbulent flow. Calculations were performed with the commercial code ANSYS R CFX R and CFD modelling using Large Eddy Simulation (LES) turbulence models by comparison with measurements to determine their suitability in the prediction of the turbulence phenomena. One of the most important aspects to be taken into account in order to properly simulate the flow downstream of the spacer grids is the use of a suitable turbulence model. Time-averaged values for all three velocity components, timeaveraged RMS values of the fluctuating component of all three velocity components in several cross-planes downstream of the spacer grid and circulation data in a selected sub-channel are in good agreement with the measured data. These results could be of great value for future studies of spacer grid including heat transfer from the rods and as a basis of spacer grid simplifications. es_ES
dc.format.extent 8 es_ES
dc.language Inglés es_ES
dc.publisher Sociedad Nuclear Española es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject CFX es_ES
dc.subject LES es_ES
dc.subject Spacer Grid es_ES
dc.subject MATiS-H es_ES
dc.subject OECD es_ES
dc.subject NEA es_ES
dc.subject IBE-2 es_ES
dc.subject.classification INGENIERIA NUCLEAR es_ES
dc.title Participation in the NEA/OECD MATiS-H Benchmark exercise. Study of spacer grids in a rod bundle es_ES
dc.title.alternative Participación en el Benchmark MATiS-H de la NEA/OCDE: Usos de códigos CFD aplicados a seguridad nuclear. Estudio de las rejillas espaciadoras en los elementos combustibles es_ES
dc.type Comunicación en congreso es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros Industriales - Escola Tècnica Superior d'Enginyers Industrials es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto de Ingeniería Energética - Institut d'Enginyeria Energètica es_ES
dc.description.bibliographicCitation Peña Monferrer, C.; Chiva Vicent, S.; Muñoz-Cobo González, JL.; Vela, E.; Pelayo, F. (2012). Participation in the NEA/OECD MATiS-H Benchmark exercise. Study of spacer grids in a rod bundle. Sociedad Nuclear Española. http://hdl.handle.net/10251/71522 es_ES
dc.description.accrualMethod Senia es_ES
dc.relation.conferencename 38ª Reunión Anual de la Sociedad Nuclear Española es_ES
dc.relation.conferencedate Octubre, 17-19, 2012 es_ES
dc.relation.conferenceplace Cáceres, Spain es_ES
dc.relation.publisherversion https://www.sne.es/es/ es_ES
dc.type.version info:eu repo/semantics/publishedVersion es_ES
dc.relation.senia 241333 es_ES


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