Acceleration of fission source convergence in the Serpent 2 Monte Carlo code using a response matrix based solution for the initial source distribution

Jaakko Leppänen

doi:10.1016/j.anucene.2018.12.044

Acceleration of fission source convergence in the Serpent 2 Monte Carlo code using a response matrix based solution for the initial source distribution

Jaakko Leppänen (Corresponding Author)

BA25 Nuclear safety

Research output: Contribution to journal › Article › Research › peer-review

Abstract

This paper presents a new response matrix based solver implemented in the Serpent 2 Monte Carlo code for the purpose of producing an improved initial guess to accelerate source convergence in criticality source simulations. The solver obtains coupling coefficients required for the response matrix solution from Monte Carlo simulations, and provides a spatial distribution that approximates the converged fission source. The implemented methodology is demonstrated by single-assembly and full-core PWR calculations. The results show that the improved initial guess leads to faster source convergence in terms of both inactive cycles and overall running time.

Original language	English
Pages (from-to)	63-68
Number of pages	6
Journal	Annals of Nuclear Energy
Volume	128
Early online date	9 Jan 2019
DOIs	https://doi.org/10.1016/j.anucene.2018.12.044
Publication status	E-pub ahead of print - 9 Jan 2019
MoE publication type	Not Eligible

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Spatial distribution

Monte Carlo simulation

Keywords

Criticality source simulation
Monte Carlo
Response matrix method
Serpent 2
Source convergence acceleration

Cite this

Leppänen, J. (2019). Acceleration of fission source convergence in the Serpent 2 Monte Carlo code using a response matrix based solution for the initial source distribution. Annals of Nuclear Energy, 128, 63-68. https://doi.org/10.1016/j.anucene.2018.12.044

Leppänen, Jaakko. / Acceleration of fission source convergence in the Serpent 2 Monte Carlo code using a response matrix based solution for the initial source distribution. In: Annals of Nuclear Energy. 2019 ; Vol. 128. pp. 63-68.

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Leppänen, J 2019, 'Acceleration of fission source convergence in the Serpent 2 Monte Carlo code using a response matrix based solution for the initial source distribution' Annals of Nuclear Energy, vol. 128, pp. 63-68. https://doi.org/10.1016/j.anucene.2018.12.044

Acceleration of fission source convergence in the Serpent 2 Monte Carlo code using a response matrix based solution for the initial source distribution. / Leppänen, Jaakko (Corresponding Author).

In: Annals of Nuclear Energy, Vol. 128, 06.2019, p. 63-68.

Research output: Contribution to journal › Article › Research › peer-review

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