Method and device for measuring fluid-solid coupling parameters of a plurality of spent fuel storage grids

Abstract

The invention discloses a method and device for measuring fluid-solid coupling parameters of a plurality of spent fuel storage grids. Sensors are arranged at the sides of the plurality of spent fuel storage grids; the plurality of spent fuel storage grids are placed in an experimental water box and gap dimensions are adjusted; an exciter provides initial excitation for the spent fuel storage grids in a given direction, so that the spent fuel storage grids vibrate freely in water. A data acquisition system collects measurement signals outputted by the sensors when the spent fuel storage grids freely vibrate in the water; and a data analysis system processes the measurement results and then measurement result data are outputted. With the method and device disclosed by the invention, the fluid-solid coupling parameters of the spent fuel storage grids arranged in a spent fuel storage pool vertically and freely in a nuclear power station are simulated and measured accurately; and the measurement result is real, accurate, and complete, so that the practical engineering need is met. Besides, the device has advantages of high automation degree, simple operation, and high measurement precision.

Description

technical field [0001] The invention belongs to the technical field of fluid-solid coupling parameters measurement, in particular to a method and device for measuring fluid-solid coupling parameters of multiple spent fuel storage grids Background technique [0002] The safe storage of spent fuel storage grids in spent fuel storage pools of nuclear power plants is an important issue in the safe operation of nuclear power plants. In the event of major natural disasters such as earthquakes and tsunamis, nuclear power plants will be damaged by huge impacts. In order to ensure the safety of nuclear power plants, it is required that the spent fuel storage grids cannot be damaged when impacted, so as to protect the spent fuel rods from damage and prevent nuclear leakage. Therefore, it is necessary to study the fluid-solid coupling parameters of the spent fuel storage grid when it is impacted in the water pool, so as to determine the stress state of the spent fuel storage grid and p...

AI Technical Summary

Problems solved by technology

[0003] The current measurement device for the fluid-solid coupling parameters of the spent fuel storage grid is to measure a single spent fuel storage grid, which can only measure the fluid-solid coupling parameters between a single spent fuel storage grid and the pool wall, and cannot measure multiple spent fuel storage grids. The fluid-solid coupling parameters between the storage grids, so it is impossible to understand the stress state between multiple spent fuel storage grids, resulting in an incomplete understanding of the stress state of the spent fuel storage grid, which affects the designed spent fuel The safety of the storage grid; during the measurement, a single spent fuel storage grid is suspended horizontally in the water pool by a simple mass-spring system, which is different from the real state of the spent fuel storage grid freely placed vertically in the spent fuel water pool The distance makes the measurement error larger and cannot meet the actual engineering needs; in addition, the existing measurement device for a single spent fuel storage grid is not highly dynamic, and it is necessary to manually adjust the measurement position of the spent fuel storage grid, which is difficult to operate. low measurement accuracy

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