Efficient Global Sensitivity Analysis of Structural Vibration for a Nuclear Reactor System Subject to Nonstationary Loading

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

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.

Citation

Banyay, G. A., Shields, M. D., & Brigham, J. C. (2020). Efficient Global Sensitivity Analysis of Structural Vibration for a Nuclear Reactor System Subject to Nonstationary Loading. Nuclear Engineering and Design, 361, https://doi.org/10.1016/j.nucengdes.2020.110544

• Journal Article Type: Article
• Acceptance Date: Jan 31, 2020
• Online Publication Date: Feb 11, 2020
• Publication Date: May 31, 2020
• Deposit Date: Feb 5, 2020
• Publicly Available Date: Feb 11, 2021
• Journal: Nuclear Engineering and Design
• Print ISSN: 0029-5493
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 361
• DOI: https://doi.org/10.1016/j.nucengdes.2020.110544
• Public URL: https://durham-repository.worktribe.com/output/1278164