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Lee, Deokjung
Computational Reactor physics & Experiment lab (CORE Lab)
Research Interests
  • Reactor Analysis computer codes development

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Convergence analysis of coarse mesh finite difference method applied to two-group three-dimensional neutron diffusion problem

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Title
Convergence analysis of coarse mesh finite difference method applied to two-group three-dimensional neutron diffusion problem
Author
Lee, Deokjung
Keywords
CMFD; Convergence analysis; Current correction factor; Eigenvalue problem; NEACRP; Transient problems
Issue Date
201209
Publisher
TAYLOR & FRANCIS LTD
Citation
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY, v.49, no.9, pp.926 - 936
Abstract
This article presents the convergence analysis of the coarse mesh finite difference (CMFD) method applied to two-group (2-G) three-dimensional (3D) neutron diffusion problem. Two CMFD algorithms are examined: one-node (1-N) CMFD and two-node (2-N) CMFD. Two test problems are used for the study of the convergence behavior: a model problem of homogeneous 2-G 3D eigenvalue problem and the NEACRP LWR transient benchmark problem. The convergence rates of the 1-N and 2-N CMFD algorithms are numerically measured in terms of the convergence of current correction factors (CCFs). The numerical test results are presented as well as the comparison with the previous analytical study. Overall, 1-N CMFD with the CCF relaxation shows a comparable performance to 2-N CMFD for the realistic 3D rod ejection transients.
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DOI
http://dx.doi.org/10.1080/00223131.2012.712478
ISSN
0022-3131
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