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Modal characteristic analysis of the apr1400 nuclear reactor internals for seismic analysis

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Reactor internals are sensitive to dynamic loads such as earthquakes and flow induced vibration. Thus, it is essential to identify the dynamic characteristics to evaluate the seismic integrity of the structures. However, a full-sized system is too large to perform modal experiments, making it difficult to extract data on its modal characteristics. In this research, we constructed a finite element model of the APR1400 reactor internals to identify their modal characteristics. | Modal characteristic analysis of the apr1400 nuclear reactor internals for seismic analysis