Enhancement in the Seismic Performance of a Nuclear Piping System using Multiple Tuned Mass Dampers

Shinyoung Kwag, Jinsung Kwak, Hwanho Lee, Jinho Oh and Gyeong-Hoi Koo
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Shinyoung Kwag: Korea Atomic Energy Research Institute, Daejeon 34057, Korea
Jinsung Kwak: Korea Atomic Energy Research Institute, Daejeon 34057, Korea
Hwanho Lee: Korea Atomic Energy Research Institute, Daejeon 34057, Korea
Jinho Oh: Korea Atomic Energy Research Institute, Daejeon 34057, Korea
Gyeong-Hoi Koo: Korea Atomic Energy Research Institute, Daejeon 34057, Korea

Energies, 2019, vol. 12, issue 11, 1-26

Abstract: In a nuclear power plant, it is essential to improve the seismic safety of the piping system for the coolant transfer to cool the high temperature caused by the nuclear reaction. Under this background, this study makes two major contributions. The first is that though tuned mass dampers (TMDs) were originally used only to reduce the vibration of piping itself, through this research, it was first proved that it had a positive effect on the improvement of the seismic performance of nuclear piping systems. Additionally, this study proposed a design approach that effectively obtains the optimal design values of TMDs associated with seismic performance. In order to effectively derive the TMD optimum design values, we not only utilized the existing TMD optimum design formula, but also additionally proposed a frequency response analysis-based TMD optimal design method. As a result, it was seen that primary responses of system were significantly reduced under the input seismic load due to the use of TMDs for the piping system. It was also confirmed that the use of the existing TMD formula brought about a similar degree of response reduction effect, while it was possible to get the improved effect when using the proposed method.

Keywords: nuclear energy; nuclear facilities; piping system; tuned mass damper; seismic performance; optimal design (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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