Abstract
The coupled fluid-structure dynamics of a pressurized water reactor core support barrel can be calculated with the K-FIX(3D, FLX) code for blowdown and seismic induced transients. The K-FIX solution method has been used to perform pre- and post-test analyses of a full scale blowdown test at the HDR facility in Frankfurt, Germany. The results verified the accuracy of the fully three-dimensional method, which solves the nonequilibrium, two-fluid equations for the fluid dynamics and the Timoshenko elastic shell equations for the core barrel motion.
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