Benchmarking of calculation schemes in Apollo2 and COBAYA3 for VVER lattices

Zheleva, Nonka and Ivanov, Plamen and Todorova, Galina and Kolev, Nikola and Herrero Carrascosa, José Javier (2013). Benchmarking of calculation schemes in Apollo2 and COBAYA3 for VVER lattices. In: "International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2013)", 05/05/2013 - 09/05/2013, San Valley, EEUU. ISBN 978-0-89448-700-2. pp. 1-14.

Description

Title: Benchmarking of calculation schemes in Apollo2 and COBAYA3 for VVER lattices
Author/s:
  • Zheleva, Nonka
  • Ivanov, Plamen
  • Todorova, Galina
  • Kolev, Nikola
  • Herrero Carrascosa, José Javier
Item Type: Presentation at Congress or Conference (Article)
Event Title: International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2013)
Event Dates: 05/05/2013 - 09/05/2013
Event Location: San Valley, EEUU
Title of Book: International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2013)
Date: 2013
ISBN: 978-0-89448-700-2
Subjects:
Freetext Keywords: APOLLO2, MOC, COBAYA3 pin-by-pin, VVER-1000, lattice benchmarks
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

This paper presents solutions of the NURISP VVER lattice benchmark using APOLLO2, TRIPOLI4 and COBAYA3 pin-by-pin. The main objective is to validate MOC based calculation schemes for pin-by-pin cross-section generation with APOLLO2 against TRIPOLI4 reference results. A specific objective is to test the APOLLO2 generated cross-sections and interface discontinuity factors in COBAYA3 pin-by-pin calculations with unstructured mesh. The VVER-1000 core consists of large hexagonal assemblies with 2mm inter-assembly water gaps which require the use of unstructured meshes in the pin-by-pin core simulators. The considered 2D benchmark problems include 19-pin clusters, fuel assemblies and 7-assembly clusters. APOLLO2 calculation schemes with the step characteristic method (MOC) and the higher-order Linear Surface MOC have been tested. The comparison of APOLLO2 vs.TRIPOLI4 results shows a very close agreement. The 3D lattice solver in COBAYA3 uses transport corrected multi-group diffusion approximation with interface discontinuity factors of GET or Black Box Homogenization type. The COBAYA3 pin-by-pin results in 2, 4 and 8 energy groups are close to the reference solutions when using side-dependent interface discontinuity factors.

More information

Item ID: 25989
DC Identifier: http://oa.upm.es/25989/
OAI Identifier: oai:oa.upm.es:25989
Official URL: http://www.mc2013.org/
Deposited by: Memoria Investigacion
Deposited on: 14 May 2014 12:36
Last Modified: 22 Sep 2014 11:39
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