### Abstract

Original language | English |
---|---|

Pages (from-to) | 50-64 |

Number of pages | 15 |

Journal | Annals of Nuclear Energy |

Volume | 100 |

Issue number | Part 2 |

DOIs | |

Publication status | Published - 2017 |

MoE publication type | A1 Journal article-refereed |

### Fingerprint

### Keywords

- copuled calculation
- effective fuel temperature
- fuel behavior
- monte carlo
- multi-physics
- tempereature feedback

### Cite this

*Annals of Nuclear Energy*,

*100*(Part 2), 50-64. https://doi.org/10.1016/j.anucene.2016.10.015

}

*Annals of Nuclear Energy*, vol. 100, no. Part 2, pp. 50-64. https://doi.org/10.1016/j.anucene.2016.10.015

**Coupled neutronics-fuel behavior calculations in steady state using the Serpent 2 Monte Carlo code.** / Valtavirta, Ville (Corresponding Author); Leppänen, Jaakko; Viitanen, Tuomas.

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

TY - JOUR

T1 - Coupled neutronics-fuel behavior calculations in steady state using the Serpent 2 Monte Carlo code

AU - Valtavirta, Ville

AU - Leppänen, Jaakko

AU - Viitanen, Tuomas

N1 - ISI: NUCLEAR SCIENCE & TECHNOLOGY

PY - 2017

Y1 - 2017

N2 - This paper describes the recent developments in the multi-physics capabilities of the Serpent Monte Carlo code concerning coupled multi-physics calculations with fuel behavior feedback. We cover the structure and operation of the fuel behavior interface in Serpent 2 as well as the coupled calculation routines implemented for steady state multi-physics calculations with any internally or externally coupled solver. The intended solution flow and code-to-code communication in internally and externally coupled multi-physics simulations is described alongside with the stochastic approximation based solution relaxation methods implemented in Serpent. The two-level multi-physics coupling scheme in Serpent 2 is demonstrated by obtaining a coupled solution for the neutronics-fuel behavior problem using first the internally coupled FINIX fuel behavior module and then the externally coupled ENIGMA fuel performance code in a 3D assembly geometry. Parameters such as maximum pellet centerline temperatures can be evaluated from the coupled solution. The temperature fields obtained from the coupled solution are also used to estimate the effect of the detailed radial representation of the fuel temperature distribution compared to various radially averaged effective fuel temperature representations. The convergence of the coupled solution is investigated alongside the possibility to speed up the convergence by using the Uniform Fission Sites method.

AB - This paper describes the recent developments in the multi-physics capabilities of the Serpent Monte Carlo code concerning coupled multi-physics calculations with fuel behavior feedback. We cover the structure and operation of the fuel behavior interface in Serpent 2 as well as the coupled calculation routines implemented for steady state multi-physics calculations with any internally or externally coupled solver. The intended solution flow and code-to-code communication in internally and externally coupled multi-physics simulations is described alongside with the stochastic approximation based solution relaxation methods implemented in Serpent. The two-level multi-physics coupling scheme in Serpent 2 is demonstrated by obtaining a coupled solution for the neutronics-fuel behavior problem using first the internally coupled FINIX fuel behavior module and then the externally coupled ENIGMA fuel performance code in a 3D assembly geometry. Parameters such as maximum pellet centerline temperatures can be evaluated from the coupled solution. The temperature fields obtained from the coupled solution are also used to estimate the effect of the detailed radial representation of the fuel temperature distribution compared to various radially averaged effective fuel temperature representations. The convergence of the coupled solution is investigated alongside the possibility to speed up the convergence by using the Uniform Fission Sites method.

KW - copuled calculation

KW - effective fuel temperature

KW - fuel behavior

KW - monte carlo

KW - multi-physics

KW - tempereature feedback

UR - http://www.scopus.com/inward/record.url?scp=84994761845&partnerID=8YFLogxK

U2 - 10.1016/j.anucene.2016.10.015

DO - 10.1016/j.anucene.2016.10.015

M3 - Article

VL - 100

SP - 50

EP - 64

JO - Annals of Nuclear Energy

JF - Annals of Nuclear Energy

SN - 0306-4549

IS - Part 2

ER -