Optimum seismic design of ventilation fan for nuclear power plant

This paper conducted the spectrum analysis using the response spectrum suggested on the emergency diesel generator room ventilating fan, a ventilation fan for nuclear power plants, in order to examine its structural safety. Furthermore, regarding the structural characteristics of the current base frame, the optimum design was conducted with the help of finite element analyses in order to increase the fundamental natural frequency over the specific frequency level (33Hz). The optimum results were verified through the comparison between the initial model with the optimized one, and the optimum solution could be reflected into the actual design in field.