Measurement and verification device and method for underwater bending and twisting deformation of fuel assembly, equipment and medium

Abstract

The invention provides a measurement and verification device for the underwater bending and twisting deformation of a fuel assembly. The device comprises a connecting part used for realizing integrated installation, a measuring part installed on the connecting part and used for realizing measurement of the fuel assembly, a rotating part which is connected with the connecting part and controls the connecting part to rotate so as to drive the measuring part to rotate, and a lifting part which is connected with the rotating part and controls the rotating part to ascend and descend so as to drive the measuring part to ascend and descend, Meanwhile, the invention also provides a corresponding method. The method comprises the steps of: collecting the three-dimensional reconstruction point cloud data of the fuel assembly through an upper group of measurement units and a lower group of measurement units; screening and fitting the point cloud data to obtain a reconstructed outer side points of the fuel assembly and a fitting plane of the reconstructed outer side points, and performing three-plane intersection on the fitting plane to obtain an intersection result; and based on the intersection result, completing the bending and twisting deformation measurement of the fuel assembly. The device and the method have the advantages of strong anti-interference capability, high stability, high precision and high speed, can realize real-time online measurement of bending and twisting deformation of the fuel assembly, and have certain watertight performance.

Description

technical field [0001] The invention belongs to the technical field of nuclear radiation safety and detection, and specifically relates to an underwater bending and torsion deformation measurement and verification device, method, equipment and medium of a fuel assembly. Background technique [0002] Nuclear safety is the lifeline of nuclear power development. At present, most commercial nuclear power plants use pressurized water reactors with relatively mature technology, good economic benefits, and high safety and reliability. The core of the pressurized water reactor is composed of fuel assemblies and other related equipment. Among them, the fuel assembly is the most important part of the reactor core. When the assembly is seriously deformed, it will affect the normal insertion of the fuel rods, resulting in the sticking of the fuel rods and endangering the safe operation of the reactor. In order to avoid the danger of stuck rods, it is necessary to regularly detect the de...

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Problems solved by technology

[0003] At present, nuclear power plants generally use underwater cameras to detect component deformation. Through the camera device installed around the component, the deformation of the component can be observed on the monitoring screen outside. This method can only roughly judge the component's deformation with the naked eye. Deformation cannot be quantitatively reflected by models and accurate measurement data, and photosensitive devices such as CCDs used in general camera devices are particularly vulnerable to damage in the special environment of the reactor. It is known from the feedback of nuclear power plants that the camera device Replacement is quite frequent

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