The analytic nodal diffusion solver ANDES in multigroups for 3D rectangular geometry: Development and performance analysis

Lozano Montero, Juan Andrés and García Herranz, Nuria and Ahnert Iglesias, Carolina and Aragonés Beltrán, José María (2008). The analytic nodal diffusion solver ANDES in multigroups for 3D rectangular geometry: Development and performance analysis. "Annals of Nuclear Energy", v. 35 (n. 12); pp. 2365-2374. ISSN 0306-4549. https://doi.org/10.1016/j.anucene.2008.07.013.

Description

Title: The analytic nodal diffusion solver ANDES in multigroups for 3D rectangular geometry: Development and performance analysis
Author/s:
  • Lozano Montero, Juan Andrés
  • García Herranz, Nuria
  • Ahnert Iglesias, Carolina
  • Aragonés Beltrán, José María
Item Type: Article
Título de Revista/Publicación: Annals of Nuclear Energy
Date: December 2008
ISSN: 0306-4549
Volume: 35
Subjects:
Freetext Keywords: Analytic coarse-mesh finite-difference, ACMFD, ANDES, 3D rectangular geometry
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Nuclear [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

In this work we address the development and implementation of the analytic coarse-mesh finite-difference (ACMFD) method in a nodal neutron diffusion solver called ANDES. The first version of the solver is implemented in any number of neutron energy groups, and in 3D Cartesian geometries; thus it mainly addresses PWR and BWR core simulations. The details about the generalization to multigroups and 3D, as well as the implementation of the method are given. The transverse integration procedure is the scheme chosen to extend the ACMFD formulation to multidimensional problems. The role of the transverse leakage treatment in the accuracy of the nodal solutions is analyzed in detail: the involved assumptions, the limitations of the method in terms of nodal width, the alternative approaches to implement the transverse leakage terms in nodal methods – implicit or explicit _, and the error assessment due to transverse integration. A new approach for solving the control rod ‘‘cusping” problem, based on the direct application of the ACMFD method, is also developed and implemented in ANDES. The solver architecture turns ANDES into an user-friendly, modular and easily linkable tool, as required to be integrated into common software platforms for multi-scale and multi-physics simulations. ANDES can be used either as a stand-alone nodal code or as a solver to accelerate the convergence of whole core pin-by-pin code systems. The verification and performance of the solver are demonstrated using both proof-of-principle test cases and well-referenced international benchmarks.

More information

Item ID: 2298
DC Identifier: http://oa.upm.es/2298/
OAI Identifier: oai:oa.upm.es:2298
DOI: 10.1016/j.anucene.2008.07.013
Official URL: http://www.elsevier.com/wps/find/journaldescription.cws_home/217/description#description
Deposited by: Memoria Investigacion
Deposited on: 20 May 2010 09:47
Last Modified: 20 Apr 2016 12:02
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