Method and system for measuring and non-dimensionalizing the fluctuating loads of a pressurized water reactor basket cylinder

CN122329610APending Publication Date: 2026-07-03SICHUAN SHULI INTELLIGENT CONTROL TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-07
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

In existing technologies, the sensor layout lacks systematic guidance, making it difficult to obtain statistical information on the load distribution on the surface of the suspended basket cylinder. Furthermore, the selection of dimensionless parameters is unclear, resulting in large dispersion of the dimensionless spectrum, which makes it difficult to apply to the response analysis of different scale models and actual reactors.

Method used

A series of pulsating pressure sensors were arranged in axial, circumferential and two-dimensional configurations. Combined with CFD steady-state flow field calculations, characteristic velocities and lengths were determined. The dimensional turbulent pulsating load spectrum was obtained through spectrum analysis and then processed to be dimensionless. This data was then applied to the flow-induced vibration response analysis of the actual stack basket assembly.

Benefits of technology

It achieves accurate acquisition of the spatial correlation length of the load on the surface of the suspended basket cylinder, reduces the uncertainty of manually estimated parameters, and the obtained dimensionless load spectrum is independent of model size and flow velocity, and is applicable to the flow-induced vibration response analysis of different scale models and actual piles.

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Abstract

This invention discloses a method for measuring and dimensionlessizing the pulsating load on the basket shell of a pressurized water reactor, belonging to the field of flow-induced vibration technology for reactor internal components. The method includes: determining the axial, circumferential, and two-dimensional arrangement of the pulsating pressure sensor group; arranging the sensor group in the upper, middle, and lower regions according to the form of the basket shell and annular cavity flow channel, ensuring that at least one of each of the three arrangement methods is arranged on the same generatrix; obtaining the characteristic velocity and characteristic length through CFD steady-state flow field calculation; acquiring the pulsating pressure time history signal at rated flow rate on a scaled-down model, obtaining the dimensional load spectrum through spectral analysis, and then performing dimensionlessization. This invention can accurately obtain the turbulent pulsating load on the surface of the basket shell, providing a key excitation input for force function construction and actual reactor flow-induced vibration response analysis, and has the characteristics of strong universality and high engineering practical value.
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