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

    Research output: Contribution to journalArticleScientificpeer-review

    1 Citation (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 languageEnglish
    Article number106955
    JournalAnnals of Nuclear Energy
    Volume135
    DOIs
    Publication statusPublished - Jan 2020
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Light water reactors
    Geometry
    Coolants
    Interpolation
    Feedback

    Keywords

    • Multiphysics
    • Serpent2
    • SUBCHANFLOW
    • VVER

    Cite this

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    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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    Serpent2-SUBCHANFLOW pin-by-pin modelling capabilities for VVER geometries. / García, Manuel (Corresponding Author); Ferraro, D.; Valtavirta, V.; Tuominen, Riku; Imke, Uwe; Leppänen, Jaakko; Sanchez-Espinoza, Victor.

    In: Annals of Nuclear Energy, Vol. 135, 106955, 01.2020.

    Research output: Contribution to journalArticleScientificpeer-review

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    AU - Imke, Uwe

    AU - Leppänen, Jaakko

    AU - Sanchez-Espinoza, Victor

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