Development of physical model describing the dynamic interaction characteristics of component connections for the analysis of an entire nuclear facility

Nishida, Akemi  

The objective of this project is to contribute to the seismic design evaluation of nuclear facilities through the construction of a numerical evaluation system which is able to evaluate both global and local behaviors of facilities under severe seismic events especially. As one of the technology components to realize this objective, we are developing and incorporating into the system a physical model describing the dynamic interaction characteristics of component connections. In this paper, we summarized about the development of the connection interaction model and the application of the model to a real plant simulation. As the results, it was verified that the responses of plant components decreased in consideration of the partial damage of the connection. It was shown that the introduction of the dynamic interaction characteristics of component connections in detail was important in the seismic design evaluation of nuclear facilities under severe seismic events.