Serpent2-SUBCHANFLOW pin-by-pin modelling capabilities for VVER geometries

Manuel García; D. Ferraro; V. Valtavirta; Riku Tuominen; Uwe Imke; Jaakko Leppänen; Victor Sanchez-Espinoza

doi:10.1016/j.anucene.2019.106955

Serpent2-SUBCHANFLOW pin-by-pin modelling capabilities for VVER geometries

Manuel García^* (Corresponding Author), D. Ferraro, V. Valtavirta, Riku Tuominen, Uwe Imke, Jaakko Leppänen, Victor Sanchez-Espinoza

^*Corresponding author for this work

Karlsruhe Institute of Technology (KIT)

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

7 Citations (Scopus)

Abstract

In the framework of the EU Horizon 2020 McSAFE project, a Serpent2-SUBCHANFLOW coupling has been developed with the aim at performing large-scale pin-by-pin depletion and transient calculations in Light Water Reactors. While this tool is not tied to a specific type of geometry, a set of capabilities have been developed to generate the pin-level hexagonal models corresponding to VVER reactors. The handling of VVER geometries is based on the use of nested hexagonal regular meshes in Serpent2, pin-level subchannel models in SUBCHANFLOW and unstructured meshes for feedback exchange and interpolation. In this work, these features are explained in detail and illustrated in a VVER-1000 fuel assembly. For this test case, an in-depth analysis is made regarding the modelling considerations in SUBCHANFLOW and their impact on the neutronic solution. In particular, the use of coolant- and fuel-centered subchannels and the explicit modelling of stiffener plates is discussed.

Original language	English
Article number	106955
Journal	Annals of Nuclear Energy
Volume	135
DOIs	https://doi.org/10.1016/j.anucene.2019.106955
Publication status	Published - Jan 2020
MoE publication type	A1 Journal article-refereed

Keywords

Multiphysics
Serpent2
SUBCHANFLOW
VVER

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10.1016/j.anucene.2019.106955

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title = "Serpent2-SUBCHANFLOW pin-by-pin modelling capabilities for VVER geometries",

abstract = "In the framework of the EU Horizon 2020 McSAFE project, a Serpent2-SUBCHANFLOW coupling has been developed with the aim at performing large-scale pin-by-pin depletion and transient calculations in Light Water Reactors. While this tool is not tied to a specific type of geometry, a set of capabilities have been developed to generate the pin-level hexagonal models corresponding to VVER reactors. The handling of VVER geometries is based on the use of nested hexagonal regular meshes in Serpent2, pin-level subchannel models in SUBCHANFLOW and unstructured meshes for feedback exchange and interpolation. In this work, these features are explained in detail and illustrated in a VVER-1000 fuel assembly. For this test case, an in-depth analysis is made regarding the modelling considerations in SUBCHANFLOW and their impact on the neutronic solution. In particular, the use of coolant- and fuel-centered subchannels and the explicit modelling of stiffener plates is discussed.",

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author = "Manuel Garc{\'i}a and D. Ferraro and V. Valtavirta and Riku Tuominen and Uwe Imke 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. Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

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doi = "10.1016/j.anucene.2019.106955",

language = "English",

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AU - Imke, Uwe

AU - Leppänen, Jaakko

AU - Sanchez-Espinoza, Victor

N1 - 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. Publisher Copyright: © 2019 Elsevier Ltd

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N2 - In the framework of the EU Horizon 2020 McSAFE project, a Serpent2-SUBCHANFLOW coupling has been developed with the aim at performing large-scale pin-by-pin depletion and transient calculations in Light Water Reactors. While this tool is not tied to a specific type of geometry, a set of capabilities have been developed to generate the pin-level hexagonal models corresponding to VVER reactors. The handling of VVER geometries is based on the use of nested hexagonal regular meshes in Serpent2, pin-level subchannel models in SUBCHANFLOW and unstructured meshes for feedback exchange and interpolation. In this work, these features are explained in detail and illustrated in a VVER-1000 fuel assembly. For this test case, an in-depth analysis is made regarding the modelling considerations in SUBCHANFLOW and their impact on the neutronic solution. In particular, the use of coolant- and fuel-centered subchannels and the explicit modelling of stiffener plates is discussed.

AB - In the framework of the EU Horizon 2020 McSAFE project, a Serpent2-SUBCHANFLOW coupling has been developed with the aim at performing large-scale pin-by-pin depletion and transient calculations in Light Water Reactors. While this tool is not tied to a specific type of geometry, a set of capabilities have been developed to generate the pin-level hexagonal models corresponding to VVER reactors. The handling of VVER geometries is based on the use of nested hexagonal regular meshes in Serpent2, pin-level subchannel models in SUBCHANFLOW and unstructured meshes for feedback exchange and interpolation. In this work, these features are explained in detail and illustrated in a VVER-1000 fuel assembly. For this test case, an in-depth analysis is made regarding the modelling considerations in SUBCHANFLOW and their impact on the neutronic solution. In particular, the use of coolant- and fuel-centered subchannels and the explicit modelling of stiffener plates is discussed.

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ER -

Serpent2-SUBCHANFLOW pin-by-pin modelling capabilities for VVER geometries

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Keywords

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