Validation of numerical models for seismic fluid-structure-interaction analysis of nuclear, safety-related equipment

Yu, Ching-Ching; Mir, Faizan Haq; Whittaker, Andrew S.

doi:10.1016/j.nucengdes.2021.111179

Validation of numerical models for seismic fluid-structure-interaction analysis of nuclear, safety-related equipment

Journal Article · Mon May 03 00:00:00 EDT 2021 · Nuclear Engineering and Design

DOI:https://doi.org/10.1016/j.nucengdes.2021.111179· OSTI ID:1780877

Yu, Ching-Ching ^[1]; Mir, Faizan Haq ^[2]; Whittaker, Andrew S. ^[2]

Univ. at Buffalo, NY (United States); University at Buffalo
Univ. at Buffalo, NY (United States)

Seismic design, qualification, and risk assessment of nuclear safety-related vessels filled with liquid will have to consider the interaction between the vessel (tank), the contained liquid, and submerged components, if any. Seismic fluid-structure-interaction (FSI) analysis of nuclear vessels will rely on numerical models, which are required to be verified and validated. This study validates previously-verified numerical models using test data generated from earthquake-simulator experiments involving a cylindrical tank. Two solvers in LS-DYNA for FSI simulations are used for the numerical analysis: Arbitrary-Lagrangian-Eulerian (ALE) and Incompressible Computational Fluid Dynamics (ICFD). Numerical and test results are compared for responses critical to seismic design of advanced reactor vessels: hydrodynamic pressures on the tank wall, reactions at the support, and wave heights of the contained liquid. Analysis is performed for one-, two-, and three-directional seismic inputs with a range of intensity, and rocking motions. The accuracy of the numerical results and different methods for outputting wave heights are discussed. Recommendations for validation of seismic FSI numerical models of advanced reactors are provided. As a result, the validation exercise presented in this study is broadly applicable to cylindrical tanks, regardless of industry sector.

View Accepted Manuscript (DOE)

Research Organization:: Univ. at Buffalo, NY (United States)

Sponsoring Organization:: USDOE Advanced Research Projects Agency - Energy (ARPA-E)

Grant/Contract Number:: AR0000978

OSTI ID:: 1780877

Alternate ID(s):: OSTI ID: 1815113

Journal Information:: Nuclear Engineering and Design, Journal Name: Nuclear Engineering and Design Vol. 379; ISSN 0029-5493

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
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Validation of numerical models for seismic fluid-structure-interaction analysis of nuclear, safety-related equipment

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