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

Ana Jambrina; Jaakko Leppänen; Heikki Suikkanen

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

Ana Jambrina (Corresponding author), Jaakko Leppänen, Heikki Suikkanen

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

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.

Original language	English
Title of host publication	Proceedings of the International Conference on Physics of Reactors, PHYSOR 2020
Subtitle of host publication	Transition to Scalable Nuclear Energy
Publisher	American Nuclear Society (ANS)
Number of pages	12
ISBN (Print)	978-1-5272-6447-2
Publication status	Published - 2020
MoE publication type	A4 Article in a conference publication
Event	International Conference on Physics of Reactors, PHYSOR 2020: Cancelled - Cambridge, United Kingdom Duration: 29 Mar 2020 → 2 Apr 2020 https://www.physor2020.com/

Conference

Conference	International Conference on Physics of Reactors, PHYSOR 2020
Country	United Kingdom
City	Cambridge
Period	29/03/20 → 2/04/20
Other	Cancelled
Internet address	https://www.physor2020.com/

Keywords

Kraken
SMR
shutdown margin
reactivity coefficient
reactivity worth

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Jambrina, A., Leppänen, J., & Suikkanen, H. (2020). Enhancing the Performance of Fission Source Convergence with Functional Expansion Tallies in Serpent 2 Monte Carlo Code. In Proceedings of the International Conference on Physics of Reactors, PHYSOR 2020: Transition to Scalable Nuclear Energy American Nuclear Society (ANS). https://drive.google.com/file/d/1OyUNC3kg0SzaBOTaXbguJfgYldtD7K3T/view

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

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.",

keywords = "Kraken, SMR, shutdown margin, reactivity coefficient, reactivity worth",

author = "Ana Jambrina and Jaakko Lepp{\"a}nen and Heikki Suikkanen",

year = "2020",

language = "English",

isbn = "978-1-5272-6447-2",

booktitle = "Proceedings of the International Conference on Physics of Reactors, PHYSOR 2020",

publisher = "American Nuclear Society (ANS)",

address = "United States",

note = "International Conference on Physics of Reactors, PHYSOR 2020 : Cancelled ; Conference date: 29-03-2020 Through 02-04-2020",

url = "https://www.physor2020.com/",

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Jambrina, A, Leppänen, J & Suikkanen, H 2020, Enhancing the Performance of Fission Source Convergence with Functional Expansion Tallies in Serpent 2 Monte Carlo Code. in Proceedings of the International Conference on Physics of Reactors, PHYSOR 2020: Transition to Scalable Nuclear Energy. American Nuclear Society (ANS), International Conference on Physics of Reactors, PHYSOR 2020, Cambridge, United Kingdom, 29/03/20. <https://drive.google.com/file/d/1OyUNC3kg0SzaBOTaXbguJfgYldtD7K3T/view>

Enhancing the Performance of Fission Source Convergence with Functional Expansion Tallies in Serpent 2 Monte Carlo Code. / Jambrina, Ana (Corresponding author); Leppänen, Jaakko; Suikkanen, Heikki.

Proceedings of the International Conference on Physics of Reactors, PHYSOR 2020: Transition to Scalable Nuclear Energy. American Nuclear Society (ANS), 2020.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

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T1 - Enhancing the Performance of Fission Source Convergence with Functional Expansion Tallies in Serpent 2 Monte Carlo Code

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AU - Leppänen, Jaakko

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PY - 2020

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N2 - 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.

AB - 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.

KW - Kraken

KW - SMR

KW - shutdown margin

KW - reactivity coefficient

KW - reactivity worth

M3 - Conference article in proceedings

SN - 978-1-5272-6447-2

BT - Proceedings of the International Conference on Physics of Reactors, PHYSOR 2020

PB - American Nuclear Society (ANS)

T2 - International Conference on Physics of Reactors, PHYSOR 2020

Y2 - 29 March 2020 through 2 April 2020

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