A4 Conference proceedings

Enhancing the Performance of Fission Source Convergence with Functional Expansion Tallies in Serpent 2 Monte Carlo Code


Open Access publication

Publication Details
Authors: Jambrina Ana, Leppänen Jaakko, Suikkanen Heikki
Publisher: EDP Sciences: EPJ Open Access / EDP Sciences
Publication year: 2020
Language: English
Related Journal or Series Information: EPJ Web of Conferences
Title of parent publication: PHYSOR2020 – International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future
Volume number: 247
Start page: 1
End page: 12
Number of pages: 12
eISBN: 978-1-5272-6447-2
ISSN: 2101-6275
eISSN: 2100-014X
JUFO-Level of this publication: 1
Open Access: Open Access publication
Location of the parallel saved publication: http://urn.fi/URN:NBN:fi-fe20201214100472

Abstract

This paper presents an upgrade to the built-in response matrix based solver implemented in Serpent 2 Monte Carlo code aiming to improve the fission source convergence when obtaining the forward solution to the k-eigenvalue criticality source problems. The functional expansion tallies are introduced in an attempt to improve the accuracy of the cell-wise form factors that feed the response matrix solver, replacing the current mesh-based approach. The functional expansion tallies reconstruct the binning surface and collision tallies, by using high-order series expansion to represent the original and continuous spatial distributions. This new feature is implemented to Serpent 2 and tested by single-assembly and full-core PWR calculations (BEAVRS benchmark). The results show enhanced performance of the convergence acceleration methodology based on an improved initial guess of the fission source.


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Last updated on 2021-17-03 at 15:29