Abstract
Generally, Mechanical structures installed in nuclear power plants are designed statically in elastic region. But from the viewpoint of cost, this method includes a lot of margin and it isn't an efficient method. Recently, Energy Balance Method is watched as a new design and evaluation method. In this report, piping models, which are generally used in the nuclear power plant, are made and input oscillation disturbance. According to the experiment, the relation between energy balance equation and fatigue of materials appeared a piping model.
