Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Seismic evaluation of different types of electrical cabinets in nuclear power plants considering coupling effects: Experimental and numerical study

  • Md Kamrul Hasan Ikbal (Department of Civil and Environmental Engineering, Kongju National University College of Engineering, Smart Natural Space Research Center) ;
  • Dong Van Nguyen (Department of Civil and Environmental Engineering, Kongju National University College of Engineering, Smart Natural Space Research Center) ;
  • Seokchul Kim (Korea Hydro & Nuclear Power Co., LTD) ;
  • Dookie Kim (Department of Civil and Environmental Engineering, Kongju National University College of Engineering, Smart Natural Space Research Center)
  • Received : 2023.03.30
  • Accepted : 2023.06.13
  • Published : 2023.09.25
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Abstract

The objective of this research is to assess the seismic performance of different types of electrical cabinets in nuclear power plants. The cabinets under investigation are: (a) Case 1: a short single cabinet; (b) Case 2: a tall single cabinet; (c) Case 3: separated cabinets; and (d) Case 4: a combined cabinet with coupling effects. To accurately capture the real behavior of the cabinet, three-dimensional finite element models are developed using ANSYS with connection non-linearity. Frequency domain decomposition (FDD) is used to determine the dynamic properties of the cabinets from shaking table testing data, and these results are utilized to validate the numerical model. The close match between the experimental and numerical results obtained from the modal analysis demonstrates the accuracy of the numerical model. Subsequently, transient structural analysis is performed on the validated models to explore seismic performance. The results show that the acceleration response of the combined cabinet is lower than the single cabinet and the separated cabinet. This observation suggests that top anchors used to combine two different types of cabinets play a crucial role in assessing the efficiency and seismic resistance of electrical cabinets in a nuclear power plant.

Keywords

Acknowledgement

This research was supported by the Underground City of the Future Program and funded by the Ministry of Science and ICT.

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