A Collision-based Domain Decomposition scheme for large-scale depletion with the Serpent 2 Monte Carlo code

Manuel García; Jaakko Leppänen; Victor Sanchez-Espinoza

doi:10.1016/j.anucene.2020.108026

A Collision-based Domain Decomposition scheme for large-scale depletion with the Serpent 2 Monte Carlo code

Manuel García (Corresponding Author), Jaakko Leppänen, Victor Sanchez-Espinoza

BA2F08 Nuclear energy solutions

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

Abstract

In the framework of the EU Horizon 2020 McSAFE project, high-fidelity multiphysics capabilities are being developed to carry out large-scale burnup calculations for Light Water Reactors. As part of this effort, the Serpent 2 Monte Carlo code has been coupled to thermalhydraulics and fuel-performance codes, with the final objective of performing fully coupled full-core pin-by-pin simulations. To enable memory scalability, needed for these massive problems, a Collision-based Domain Decomposition (CDD) scheme has been implemented in Serpent 2. The methodology is based on data decomposition for burnable materials and a domain decomposition particle-tracking algorithm, and is shown here to provide the required memory scalability and computational performance, with up to 50% speedup efficiency at 5,120 cores. The application of the CDD feature is demonstrated in a pin-by-pin depletion calculation for a Pre-Konvoi PWR reactor.

Original language	English
Article number	108026
Journal	Annals of Nuclear Energy
Volume	152
DOIs	https://doi.org/10.1016/j.anucene.2020.108026
Publication status	Published - Mar 2021
MoE publication type	A1 Journal article-refereed

Keywords

Collision-based Domain Decomposition
High Performance Computing
Pin-level depletion
Serpent 2

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10.1016/j.anucene.2020.108026

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title = "A Collision-based Domain Decomposition scheme for large-scale depletion with the Serpent 2 Monte Carlo code",

abstract = "In the framework of the EU Horizon 2020 McSAFE project, high-fidelity multiphysics capabilities are being developed to carry out large-scale burnup calculations for Light Water Reactors. As part of this effort, the Serpent 2 Monte Carlo code has been coupled to thermalhydraulics and fuel-performance codes, with the final objective of performing fully coupled full-core pin-by-pin simulations. To enable memory scalability, needed for these massive problems, a Collision-based Domain Decomposition (CDD) scheme has been implemented in Serpent 2. The methodology is based on data decomposition for burnable materials and a domain decomposition particle-tracking algorithm, and is shown here to provide the required memory scalability and computational performance, with up to 50% speedup efficiency at 5,120 cores. The application of the CDD feature is demonstrated in a pin-by-pin depletion calculation for a Pre-Konvoi PWR reactor.",

keywords = "Collision-based Domain Decomposition, High Performance Computing, Pin-level depletion, Serpent 2",

author = "Manuel Garc{\'i}a and Jaakko Lepp{\"a}nen and Victor Sanchez-Espinoza",

note = "Funding Information: This work was done within the McSAFE project which is receiving funding from the Euratom research and training programme 2014–2018 under grant agreement No 755097. Funding Information: This work was performed on the computational resource ForHLR II funded by the Ministry of Science, Research and the Arts Baden-W{\"u}rttemberg and DFG (”Deutsche Forschungsgemeinschaft”). Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

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