Automatic positioning and defect detection system and method for spent fuel storage grid of nuclear power station

Abstract

The invention discloses an automatic positioning and defect detection system and method for a spent fuel storage grid of a nuclear power station, wherein the system comprises an underwater detection device provided with an underwater camera assembly for photographing a video image at an opening of a storage chamber, a video acquisition assembly used for acquiring a video image shot by the underwater camera assembly, an image and data processing system comprising an image processing module and a measurement calculation module, an image processing module used for processing the video images, shot by the underwater camera assembly, at the opening of the storage chamber to obtain the outline of the storage chamber, and a measurement and calculation module used for positioning the center of thestorage chamber, calculating the coordinate offset L of the center of the storage chamber relative to a spent fuel assembly gripper, and calculating actual coordinates of the storage chamber in combination with the coordinates of the spent fuel assembly gripper. Compared with an existing manual measurement method, the method has the advantage that great progress is generated in at least three aspects of safety, quality and efficiency.

Description

technical field [0001] The invention belongs to the field of commissioning and operation and maintenance of fuel operation and storage systems in nuclear power plants, and more specifically, the invention relates to a system and method for automatic positioning and defect detection of spent fuel storage grids in nuclear power plants. Background technique [0002] The spent fuel storage grid is a key piece of equipment belonging to the fuel handling and storage system (PMC) of a nuclear power plant. It is located in the spent fuel pool of the fuel plant and is mainly used for safe storage of nuclear fuel assemblies and refueling During the period, it also provides a platform and protection function for performing fuel assembly replacement and related component interchange operations. [0003] A million-kilowatt pressurized water reactor nuclear power plant generally requires that the fuel discharged by 20 fuel cycles plus the fuel of a complete core can be stored underwater. ...

AI Technical Summary

Problems solved by technology

For the defects inside the storage chamber, it is usually inspected by waterproof general-purpose industrial endoscope or underwater camera assembly, and the horizontal and vertical movements of the endoscope and underwater camera assembly are manually performed by the operator. It is not only very inconvenient to operate by carrying the cable, but also the work efficiency is relatively low. The collected images are all manually observed and judged. The workload is huge and requires a lot of manpower and construction time resources.

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