Numerical analysis on pressure propagation in pressure suppression system due to steam bubble collapse

In order to provide a numerical tool for the analysis of pressure response to steam bubble collapse in a BWR pressure suppression system, a computer program has been developed. The program is featured in the capability of handing three-dimensional fluid structure interaction based on finite element method. Numerical results are compared with experiments in both frequency and time domains. Natural frequencies of the fluid structure system are well predicted. Fluid damping associated with the bubble collapse and pressure wave travelling needs further investigation. (author)