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http://dx.doi.org/10.7734/COSEIK.2022.35.2.83

A Study on the Effects of Nuclear Power Plant Structure-Component Interaction in Component Seismic Responses  

Kwag, Shinyoung (Department of Civil & Environmental Engineering, Hanbat National University)
Eem, Seunghyun (Department of Convergence and Fusion System Engineering, Kyungpook National University)
Jung, Kwangsub (Korea Atomic Energy Research Institute)
Jung, Jaewook (Korea Atomic Energy Research Institute)
Choi, In-Kil (Korea Atomic Energy Research Institute)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.35, no.2, 2022 , pp. 83-91 More about this Journal
Abstract
Seismic design and analysis of nuclear power plant components are performed based on an decoupled model. However, this decoupled analysis has a limitation in that it generates inaccurate results compared to the coupled analysis because it cannot simulate actual phenomena such as the interaction between structures and components. Thus, this study performed seismic coupled and decoupled analysis on an existing nuclear containment structure and related components, considering the mass and natural frequency ratios. And based on these results, comparative analyses of responses of components were conducted. Consequently, the seismic coupled analysis result generally gave a smaller value than the decoupled analysis result. These results were similar to the analysis results for the simple coupled model, which was an existing study, but the difference in component responses was much more pronounced. Also, this was influenced by the installation location of the component rather than the influence of the input frequency of the input seismic motions. Finally, the difference between the decoupled and coupled seismic analysis occurred in the region where the mass ratio of the components was large, and the natural frequencies were almost similar due to the considerable dynamic interaction between the structure and the component in this realm.
Keywords
nuclear power plant; sub-system; structure-component interaction; seismic coupled analysis; seismic decoupled analysis;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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