Effect of energy deposition modelling in coupled steady state Monte Carlo neutronics/thermal hydraulics calculations

Riku Tuominen; Ville Valtavirta; Manuel García; Diego Ferraro; Jaakko Leppänen

doi:10.1051/epjconf/202124706001

Effect of energy deposition modelling in coupled steady state Monte Carlo neutronics/thermal hydraulics calculations

Riku Tuominen^*
, Ville Valtavirta
, Manuel García
, Diego Ferraro
, Jaakko Leppänen

^*Corresponding author for this work

BA4501 Reactor analysis

Karlsruhe Institute of Technology (KIT)

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

2 Citations (Scopus)

Abstract

In coupled calculations with Monte Carlo neutronics and thermal hydraulics the Monte Carlo code is used to produce a power distribution which in practice means tallying the energy deposition. Usually the energy deposition is estimated by making a simple approximation that energy is deposited only in fission reactions. The goal of this work is to study how the accuracy of energy deposition modelling affects the results of steady state coupled calculations. For this task an internal coupling between Monte Carlo transport code Serpent 2 and subchannel code SUBCHANFLOW is used along with a recently implemented energy deposition treatment of Serpent 2. The new treatment offers four energy deposition modes each of which offers a different combination of accuracy and required computational time. As a test case, a 3D PWR fuel assembly is modelled with different energy deposition modes. The resulting effective multiplication factors are within 30 pcm. Differences of up to 100 K are observed in the fuel temperatures.

Original language	English
Pages (from-to)	919-926
Number of pages	8
Journal	EPJ Web of Conferences
Volume	247
DOIs	https://doi.org/10.1051/epjconf/202124706001
Publication status	Published - 2020
MoE publication type	A4 Article in a conference publication
Event	International Conference on Physics of Reactors, PHYSOR 2020: Transition to a Scalable Nuclear Future - Cambridge, United Kingdom Duration: 28 Mar 2020 → 2 Apr 2020

Funding

This work has been funded from the McSAFE project which is receiving funding from the Euratom research and training programme 2014-2018 under grant agreement No 755097.

Keywords

Energy deposition
Monte Carlo
Multi-physics
Serpent
SUBCHANFLOW

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10.1051/epjconf/202124706001Licence: CC BY

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title = "Effect of energy deposition modelling in coupled steady state Monte Carlo neutronics/thermal hydraulics calculations",

abstract = "In coupled calculations with Monte Carlo neutronics and thermal hydraulics the Monte Carlo code is used to produce a power distribution which in practice means tallying the energy deposition. Usually the energy deposition is estimated by making a simple approximation that energy is deposited only in fission reactions. The goal of this work is to study how the accuracy of energy deposition modelling affects the results of steady state coupled calculations. For this task an internal coupling between Monte Carlo transport code Serpent 2 and subchannel code SUBCHANFLOW is used along with a recently implemented energy deposition treatment of Serpent 2. The new treatment offers four energy deposition modes each of which offers a different combination of accuracy and required computational time. As a test case, a 3D PWR fuel assembly is modelled with different energy deposition modes. The resulting effective multiplication factors are within 30 pcm. Differences of up to 100 K are observed in the fuel temperatures.",

keywords = "Energy deposition, Monte Carlo, Multi-physics, Serpent, SUBCHANFLOW",

author = "Riku Tuominen and Ville Valtavirta and Manuel Garc{\'i}a and Diego Ferraro and Jaakko Lepp{\"a}nen",

note = "Funding Information: This work has been funded from the McSAFE project which is receiving funding from the Euratom research and training programme 2014-2018 under grant agreement No 755097. Publisher Copyright: {\textcopyright} The Authors, published by EDP Sciences. This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/).; International Conference on Physics of Reactors, PHYSOR 2020 : Transition to a Scalable Nuclear Future ; Conference date: 28-03-2020 Through 02-04-2020",

year = "2020",

doi = "10.1051/epjconf/202124706001",

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AU - Tuominen, Riku

AU - Valtavirta, Ville

AU - García, Manuel

AU - Ferraro, Diego

AU - Leppänen, Jaakko

N1 - Funding Information: This work has been funded from the McSAFE project which is receiving funding from the Euratom research and training programme 2014-2018 under grant agreement No 755097. Publisher Copyright: © The Authors, published by EDP Sciences. This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/).

PY - 2020

Y1 - 2020

N2 - In coupled calculations with Monte Carlo neutronics and thermal hydraulics the Monte Carlo code is used to produce a power distribution which in practice means tallying the energy deposition. Usually the energy deposition is estimated by making a simple approximation that energy is deposited only in fission reactions. The goal of this work is to study how the accuracy of energy deposition modelling affects the results of steady state coupled calculations. For this task an internal coupling between Monte Carlo transport code Serpent 2 and subchannel code SUBCHANFLOW is used along with a recently implemented energy deposition treatment of Serpent 2. The new treatment offers four energy deposition modes each of which offers a different combination of accuracy and required computational time. As a test case, a 3D PWR fuel assembly is modelled with different energy deposition modes. The resulting effective multiplication factors are within 30 pcm. Differences of up to 100 K are observed in the fuel temperatures.

AB - In coupled calculations with Monte Carlo neutronics and thermal hydraulics the Monte Carlo code is used to produce a power distribution which in practice means tallying the energy deposition. Usually the energy deposition is estimated by making a simple approximation that energy is deposited only in fission reactions. The goal of this work is to study how the accuracy of energy deposition modelling affects the results of steady state coupled calculations. For this task an internal coupling between Monte Carlo transport code Serpent 2 and subchannel code SUBCHANFLOW is used along with a recently implemented energy deposition treatment of Serpent 2. The new treatment offers four energy deposition modes each of which offers a different combination of accuracy and required computational time. As a test case, a 3D PWR fuel assembly is modelled with different energy deposition modes. The resulting effective multiplication factors are within 30 pcm. Differences of up to 100 K are observed in the fuel temperatures.

KW - Energy deposition

KW - Monte Carlo

KW - Multi-physics

KW - Serpent

KW - SUBCHANFLOW

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DO - 10.1051/epjconf/202124706001

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AN - SCOPUS:85108426496

SN - 2101-6275

VL - 247

SP - 919

EP - 926

JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

T2 - International Conference on Physics of Reactors, PHYSOR 2020

Y2 - 28 March 2020 through 2 April 2020

ER -

Effect of energy deposition modelling in coupled steady state Monte Carlo neutronics/thermal hydraulics calculations

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