Start-up of a cold loop in a VVER-440, the 7th AER benchmark calculation with HEXTRAN-SMABRE-PORFLO

    Research output: Contribution to journalArticleScientificpeer-review

    Abstract

    The 7th dynamic AER benchmark is the first in which three-dimensional thermal hydraulics codes are supposed to be applied. The aim is to get a more precise core inlet temperature profile than the sector temperatures available typically with system codes. The benchmark consists of a start-up of the sixth, isolated loop in a VVER-440 plant. The isolated loop initially contains cold water without boric acid and the start-up leads to a somewhat asymmetrical core power increase due to feedbacks in the core. In this study, the 7th AER benchmark is calculated with the three-dimensional nodal reactor dynamics code HEXTRAN-SMABRE coupled with the porous computational fluid dynamics code PORFLO. These three codes are developed at VTT. A novel two-way coupled simulation of the 7th AER benchmark was performed successfully demonstrating the feasibility and advantages of the new reactor analysis framework. The modelling issues for this benchmark are reported and some evaluation against the previously reported comparisons between the system codes is provided.
    Original languageEnglish
    Pages (from-to)426-435
    Number of pages10
    JournalKerntechnik
    Volume82
    Issue number4
    DOIs
    Publication statusPublished - 1 Sep 2017
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Boric acid
    Computational fluid dynamics
    Hydraulics
    Feedback
    Temperature
    Water
    reactors
    cold water
    inlet temperature
    boric acids
    computational fluid dynamics
    hydraulics
    temperature profiles
    sectors
    evaluation
    Hot Temperature
    boric acid
    simulation
    temperature

    Keywords

    • VVER-440
    • HEXTRAN
    • SMABRE
    • PORFLO

    Cite this

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    title = "Start-up of a cold loop in a VVER-440, the 7th AER benchmark calculation with HEXTRAN-SMABRE-PORFLO",
    abstract = "The 7th dynamic AER benchmark is the first in which three-dimensional thermal hydraulics codes are supposed to be applied. The aim is to get a more precise core inlet temperature profile than the sector temperatures available typically with system codes. The benchmark consists of a start-up of the sixth, isolated loop in a VVER-440 plant. The isolated loop initially contains cold water without boric acid and the start-up leads to a somewhat asymmetrical core power increase due to feedbacks in the core. In this study, the 7th AER benchmark is calculated with the three-dimensional nodal reactor dynamics code HEXTRAN-SMABRE coupled with the porous computational fluid dynamics code PORFLO. These three codes are developed at VTT. A novel two-way coupled simulation of the 7th AER benchmark was performed successfully demonstrating the feasibility and advantages of the new reactor analysis framework. The modelling issues for this benchmark are reported and some evaluation against the previously reported comparisons between the system codes is provided.",
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    author = "Ville Hovi and Veikko Taivassalo and Anitta H{\"a}m{\"a}l{\"a}inen and Hanna R{\"a}ty and Elina Syrj{\"a}lahti",
    year = "2017",
    month = "9",
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    doi = "10.3139/124.110820",
    language = "English",
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    journal = "Kerntechnik",
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    Start-up of a cold loop in a VVER-440, the 7th AER benchmark calculation with HEXTRAN-SMABRE-PORFLO. / Hovi, Ville; Taivassalo, Veikko; Hämäläinen, Anitta; Räty, Hanna; Syrjälahti, Elina.

    In: Kerntechnik, Vol. 82, No. 4, 01.09.2017, p. 426-435.

    Research output: Contribution to journalArticleScientificpeer-review

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