FSI-calculation of a pool cooler in case of earthquake excitation for NPP Beznau

## Problem description:

Determination of the loads on a pool cooler induced by earthquake acceleration and pressure waves in case of earthquake.

## Scope:

**Drawing up** a 3D model of the pool cooler and the surrounding water.

**Excitation** of the pool walls and the supports of the cooler with a predetermined acceleration-time-distribution.

**Determination** of unsteady

- Pressure distributions on the cooler
- Displacement, velocity and acceleration distributions of all nodes of the cooler
- Support forces and moments

**Consideration** of two-way interaction (FSI) between the cooler and the surrounding water.

## Technical specification:

Geometry of the fuel storage pool | 9.9 m x 7.2 m x 8.6 m |

Geometry cooler | 4.4 m x 5.4 m x 0.4 m |

Cooler weight | 8600 kg |

## Results:

Pressure distribution in a xz-plane

t = 8.43 s

Pressure distribution on the front and back

t = 11.76 s

Maximum integral fluid force on the cooler | 800 kN |

Maximum support force | ± 915 kN |