Numerical Simulation of liquid sloshing with smoothed particle hydrodynamics (SPH) method in nuclear power plant facilities

Sloshing of liquids can be observed whenever a fluid in a tank or pool will be excited with a frequency close to the natural frequency of the fluid. This may cause large structural loads in the walls of tanks, their supports and anchors as well as in the concrete structure of pools.

The goal was to establish a calculation method to analyze the sloshing effects in a realistic way. Due to the sensitivity of the nuclear society, it was required to perform a validation (benchmark) of the RADIOSS SPH‐method. Therefore we chose a couple of experimental tests and compared our results with these data. The chosen method represents a realistic behavior of the fluid and is transferred to real simulations.

Two real simulations will be presented. The first will be a fuel storage tank (horizontal cylinder) of an emergency diesel generator under earthquake conditions which is filled with diesel fuel. The second will be a flooded containment of a reactor building under earthquake conditions. In both simulations a real time history earthquake spectrum is used. The results of both simulations are loads on the walls or concrete structures as well as the fluid behavior itself.

Co-Author: B. Pacharzina

 

The Author

Matthias Reichert
CAE Engineer
Westinghouse Electric Germany GmbH