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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.

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


Authors

Gregory A. Banyay

Michael D. Shields

John C. Brigham



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

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