Journal
NUCLEAR ENGINEERING AND DESIGN
Volume 347, Issue -, Pages 53-58Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.nucengdes.2019.03.020
Keywords
Seismic isolation; Isolated nuclear power plants; Stochastic response database; Seismic response; Sensitivity analysis
Categories
Funding
- National Research Foundation of Korea (NRF) - Korean government [NRF-2017M2A8A4014829]
- National Research Foundation of Korea [2017M2A8A4014829] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The seismic performance of nuclear power plants can be improved by installing the proposed seismic isolation system. Due to the characteristics of this system, while acceleration seismic response and base shear can be reduced, the displacement seismic response of the isolated structure increases. Therefore, the restriction of excessive displacement responses becomes critical to the design and safety assessment of isolated structures. Such seismic design and safety assessment requires a seismic response distribution, which itself necessitates a large number of nonlinear dynamic analyses. However, the stochastic response database can directly estimate the maximum seismic response distribution of an isolated structure without nonlinear dynamic analyses. In this study, a sensitivity analysis was performed using the stochastic response database for the isolated structures that affect the maximum seismic response distribution. First, the important seismic isolation parameters were selected, followed by an investigation into the effects these parameters have on the mean and standard deviation of the maximum seismic response distribution of the isolated structure. It is believed that this information will be useful in the seismic design and safety assessment of nuclear power plants with seismic isolation systems.
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