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

Tuominen, R.; Valtavirta, V.; García, Manuel; Ferraro, Diego; Leppänen, J.

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 100K are observed in the fuel temperatures.

Verlagsausgabe §
DOI: 10.5445/IR/1000135213
Veröffentlicht am 12.07.2021
DOI: 10.1051/epjconf/202124706001
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Neutronenphysik und Reaktortechnik (INR)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2020
Sprache Englisch
Identifikator ISBN: 978-1-71382-724-5
KITopen-ID: 1000135213
HGF-Programm 32.02.01 (POF III, LK 01) Sicherheitsanalysen: Anlagendynamik
Erschienen in PHYSOR2020 – International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future
Veranstaltung International Conference on Physics of Reactors (PHYSOR 2020), Online, 29.03.2020 – 02.04.2020
Verlag EDP Sciences
Seiten Art.-Nr.: 06001
Serie EPJ Web of Conferences ; 247
Schlagwörter Monte Carlo / multi-physics / energy deposition / Serpent / SUBCHANFLOW
Nachgewiesen in Dimensions
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