Neighborhood-corrected interface discontinuity factors for multi-group pin-by-pin diffusion calculations for LWR

Herrero Carrascosa, José Javier; García Herranz, Nuria; Cuervo Gómez, Diana y Ahnert Iglesias, Carolina (2012). Neighborhood-corrected interface discontinuity factors for multi-group pin-by-pin diffusion calculations for LWR. "Annals of Nuclear Energy", v. 46 ; pp. 106-115. ISSN 0306-4549. https://doi.org/10.1016/j.anucene.2012.03.022.

Descripción

Título: Neighborhood-corrected interface discontinuity factors for multi-group pin-by-pin diffusion calculations for LWR
Autor/es:
  • Herrero Carrascosa, José Javier
  • García Herranz, Nuria
  • Cuervo Gómez, Diana
  • Ahnert Iglesias, Carolina
Tipo de Documento: Artículo
Título de Revista/Publicación: Annals of Nuclear Energy
Fecha: Agosto 2012
Volumen: 46
Materias:
Palabras Clave Informales: Interface discontinuity factor; Pin-by-pin computations; Environment effect; ACMFD
Escuela: E.T.S.I. Industriales (UPM)
Departamento: Ingeniería Nuclear [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

Texto completo

[img]
Vista Previa
PDF (Document Portable Format) - Se necesita un visor de ficheros PDF, como GSview, Xpdf o Adobe Acrobat Reader
Descargar (5MB) | Vista Previa

Resumen

Performing three-dimensional pin-by-pin full core calculations based on an improved solution of the multi-group diffusion equation is an affordable option nowadays to compute accurate local safety parameters for light water reactors. Since a transport approximation is solved, appropriate correction factors, such as interface discontinuity factors, are required to nearly reproduce the fully heterogeneous transport solution. Calculating exact pin-by-pin discontinuity factors requires the knowledge of the heterogeneous neutron flux distribution, which depends on the boundary conditions of the pin-cell as well as the local variables along the nuclear reactor operation. As a consequence, it is impractical to compute them for each possible configuration; however, inaccurate correction factors are one major source of error in core analysis when using multi-group diffusion theory. An alternative to generate accurate pin-by-pin interface discontinuity factors is to build a functional-fitting that allows incorporating the environment dependence in the computed values. This paper suggests a methodology to consider the neighborhood effect based on the Analytic Coarse-Mesh Finite Difference method for the multi-group diffusion equation. It has been applied to both definitions of interface discontinuity factors, the one based on the Generalized Equivalence Theory and the one based on Black-Box Homogenization, and for different few energy groups structures. Conclusions are drawn over the optimal functional-fitting and demonstrative results are obtained with the multi-group pin-by-pin diffusion code COBAYA3 for representative PWR configurations.

Más información

ID de Registro: 15205
Identificador DC: http://oa.upm.es/15205/
Identificador OAI: oai:oa.upm.es:15205
Identificador DOI: 10.1016/j.anucene.2012.03.022
URL Oficial: http://www.sciencedirect.com/science/article/pii/S0306454912001016
Depositado por: Memoria Investigacion
Depositado el: 03 Dic 2013 19:05
Ultima Modificación: 21 Abr 2016 15:12
  • Open Access
  • Open Access
  • Sherpa-Romeo
    Compruebe si la revista anglosajona en la que ha publicado un artículo permite también su publicación en abierto.
  • Dulcinea
    Compruebe si la revista española en la que ha publicado un artículo permite también su publicación en abierto.
  • Recolecta
  • e-ciencia
  • Observatorio I+D+i UPM
  • OpenCourseWare UPM