Three-dimensional numerical study on the mechanism of anisotropic MCCI by improved MPS method

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    In two-dimensional (2-D) molten corium-concrete interaction (MCCI) experiments with prototypic corium and siliceous concrete, the more pronounced lateral concrete erosion behavior than that in the axial direction, namely anisotropic ablation, has been a research interest. However, the knowledge of the mechanism on this anisotropic ablation behavior, which is important for severe accident analysis and management, is still limited. In this paper, 3-D simulation of 2-D MCCI experiment VULCANO VB-U7 has been carried out with improved Moving Particle Semi-implicit (MPS) method. Heat conduction, phase change, and corium viscosity models have been developed and incorporated into MPS code MPS-SW-MAIN-Ver.2.0 for current study. The influence of thermally stable silica aggregates has been investigated by setting up different simulation cases for analysis. The simulation results suggested reasonable models and assumptions to be considered in order to achieve best estimation of MCCI with prototypic oxidic corium and siliceous concrete. The simulation results also indicated that silica aggregates can contribute to anisotropic ablation. The mechanisms for anisotropic ablation pattern in siliceous concrete as well as isotropic ablation pattern in limestone-rich concrete have been clarified from a mechanistic perspective.

    Original languageEnglish
    Pages (from-to)207-216
    Number of pages10
    JournalNuclear Engineering and Design
    Volume314
    DOIs
    Publication statusPublished - 2017 Apr 1

    Fingerprint

    Molten materials
    Concretes
    ablation
    Ablation
    interactions
    simulation
    Silicon Dioxide
    silica
    Silica
    silicon dioxide
    particle
    method
    Calcium Carbonate
    limestone
    accidents
    accident
    Limestone
    Heat conduction
    conductive heat transfer
    erosion

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics
    • Materials Science(all)
    • Nuclear Energy and Engineering
    • Safety, Risk, Reliability and Quality
    • Waste Management and Disposal
    • Mechanical Engineering

    Cite this

    Three-dimensional numerical study on the mechanism of anisotropic MCCI by improved MPS method. / Li, Xin; Yamaji, Akifumi.

    In: Nuclear Engineering and Design, Vol. 314, 01.04.2017, p. 207-216.

    Research output: Contribution to journalArticle

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