Analytic Coarse-Mesh Finite-Difference Method Generalized for Heterogeneous Multidimensional Two-Group Diffusion Calculations

García Herranz, Nuria; Cabellos de Francisco, Oscar Luis; Aragonés Beltrán, José María y Ahnert Iglesias, Carolina (2003). Analytic Coarse-Mesh Finite-Difference Method Generalized for Heterogeneous Multidimensional Two-Group Diffusion Calculations. "Nuclear Science And Engineering", v. 144 (n. 1); pp. 23-35. ISSN 0029-5639.

Descripción

Título: Analytic Coarse-Mesh Finite-Difference Method Generalized for Heterogeneous Multidimensional Two-Group Diffusion Calculations
Autor/es:
  • García Herranz, Nuria
  • Cabellos de Francisco, Oscar Luis
  • Aragonés Beltrán, José María
  • Ahnert Iglesias, Carolina
Tipo de Documento: Artículo
Título de Revista/Publicación: Nuclear Science And Engineering
Fecha: Mayo 2003
Volumen: 144
Materias:
Escuela: E.T.S.I. Industriales (UPM)
Departamento: Ingeniería Nuclear [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

In order to take into account in a more effective and accurate way the intranodal heterogeneities in coarse-mesh finite-difference (CMFD) methods, a new equivalent parameter generation methodology has been developed and tested. This methodology accounts for the dependence of the nodal homogeneized two-group cross sections and nodal coupling factors, with interface flux discontinuity (IFD) factors that account for heterogeneities on the flux-spectrum and burnup intranodal distributions as well as on neighbor effects. The methodology has been implemented in an analytic CMFD method, rigorously obtained for homogeneous nodes with transverse leakage and generalized now for heterogeneous nodes by including IFD heterogeneity factors. When intranodal mesh node heterogeneity vanishes, the heterogeneous solution tends to the analytic homogeneous nodal solution. On the other hand, when intranodal heterogeneity increases, a high accuracy is maintained since the linear and nonlinear feedbacks on equivalent parameters have been shown to be as a very effective way of accounting for heterogeneity effects in two-group multidimensional coarse-mesh diffusion calculations.

Más información

ID de Registro: 44293
Identificador DC: http://oa.upm.es/44293/
Identificador OAI: oai:oa.upm.es:44293
URL Oficial: http://www.ans.org/pubs/journals/nse/a_2340
Depositado por: Memoria Investigacion
Depositado el: 10 Ene 2017 08:55
Ultima Modificación: 12 Ene 2017 11:40
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