Experimental study on impulsive liquid pressure by sloshing

Pool type FBR (Fast Breeder Reactor) vessel contains large quantity (about 3,000 ∼ 4,000 tons) of high temperature (about 400 ∼ 500degC) liquid sodium with free surface. Sloshing wave gradually grow during earthquake and this liquid surface may collide with under roof of reactor vessel, cousing large impulsive pressure on heat insulator assembly under the roof. In this paper, we describe an experimental study of impulsive pressure by sloshing. Model used in this experiments are cylindrical (2.2 m Diameter; 1 m Depth), and two rectangular (6.7 m Length, 2 m Width; 2.5 m Depth, and 0.55 m Length; 0.2 m Width; 0.2 m Depth) models. In this experiment, we use water instead of liquid sodium, because water can be handled more easily than liquid sodium. From the experimental results, we derived a formula to obtain impulsive pressure value. (author)