To reduce costs and to extend the lifetime of piping systems their design loads due to valve action have to be optimized. To get the best effect the results of the fluiddynamic and structural calculations should be realistic as far as possible. Therefore, the calculation programs were coupled to consider the fluid structure interaction and the effect of dynamic fluid friction was introduced to get realistic results of oscillations due to pressure surges. Detailed modeling of check valve behavior allows minimizing the pressure surge loading by improving the valve function and adapting it to the system behavior. The method was validated at measurements of load cases in power plant piping systems. Results with different load cases show the effectiveness of reducing the fluid forces on piping. Examples are given to prove the reduction of supports.

Keywords:
nuclear power stations, fission reactor cooling, fission reactor theory, fission reactor design, pipes, valves, nuclear engineering computing, fission reactor materials
Topics:
Fluid structure interaction, Fluids, Optimization, Pipes, Piping systems, Pressure, Stress, Surges, Valves, Sliding friction, Design, Computational methods
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