Abstract
A general purpose dynamic analysis program for hydraulic piping network systems in nuclear power plants has been developed. This program solves coupled differential equations with a new matrix solution method, taking into account the changes in the network flow path pattern. Modeling for the control system with fundamental module units and a simplified method of initial calculations were introduced to realize a highly general applicability. Verification was performed by comparing the calculated results from the developed program to those from a detailed dynamic analysis program for the condensate feedwater system in a BWR plant. Additional calculated results are presented on the application to the dynamic analysis of BWR auxiliary systems. The results obtained to date demonstrate the modeling adequacy and program capabilities.
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