Efficient global sensitivity analysis of structural vibration for a nuclear reactor system subject to nonstationary loading

Gregory A. Banyay, Michael D. Shields, John C. Brigham

    Research output: Contribution to journalArticlepeer-review

    4 Scopus citations

    Abstract

    The structures associated with the nuclear steam supply system (NSSS) of a pressurized water reactor (PWR) include significant epistemic and aleatory uncertainties in the physical parameters, while also being subject to various non-stationary stochastic loading conditions over the life of a nuclear power plant. To understand the influence of these uncertainties on nuclear reactor systems, sensitivity analysis must be performed. This work evaluates computational design of experiment strategies, which execute a nuclear reactor equipment system finite element model to train and verify Gaussian Process (GP) surrogate models. The surrogate models are then used to perform both global and local sensitivity analyses. The significance of the sensitivity analysis for efficient modeling and simulation of nuclear reactor stochastic dynamics is discussed.

    Original languageEnglish (US)
    Article number110544
    JournalNuclear Engineering and Design
    Volume361
    DOIs
    StatePublished - May 2020

    All Science Journal Classification (ASJC) codes

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

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