Nuclear power station double-layer containment annulus area defect inspection system and method

Abstract

The invention discloses a nuclear power station double-layer containment annulus area defect inspection system and defect inspection method, and the defect inspection system comprises an unmanned aerial vehicle system and a ground computer system; the unmanned aerial vehicle system comprises an unmanned aerial vehicle, and a three-dimensional laser scanner, a laser range finder and a high-definition camera which are carried on the unmanned aerial vehicle, the three-dimensional laser scanner is used for scanning the surrounding space of the position where the unmanned aerial vehicle is locatedand drawing a surrounding three-dimensional image; the laser range finder is used for accurately measuring the distance from the unmanned aerial vehicle to the outer surface of an inner-layer containment vessel; the high-definition camera is used for shooting a picture of the detected concrete surface; and the ground computer system is used for controlling the position of the unmanned aerial vehicle, determining the accurate position of the unmanned aerial vehicle according to the three-dimensional image of the three-dimensional laser scanner, determining the accurate position of the picture shot by the high-definition camera on the containment vessel, processing the picture shot by the high-definition camera and extracting defect characteristics, and if the picture is a defect, storing the picture, the defect information and the defect position into a database.

Description

technical field [0001] The invention belongs to the technical field of nuclear power, and more specifically, the invention relates to a defect inspection system and a defect inspection method for a nuclear power plant double-layer containment ring gallery area. Background technique [0002] The nuclear power plant containment is a cylindrical prestressed reinforced concrete structure with a quasi-spherical dome, which is the last barrier to prevent fission products from fuel and primary radioactive materials from entering the environment. After a loss of water accident (LOCA: Loss of Coolant Accident) in the reactor, a large amount of radioactive and high-temperature and high-pressure steam-water mixture released can be contained and isolated by the containment to prevent harm to the residents around the nuclear power plant. [0003] According to the structure, the containment of nuclear power plants can generally be divided into single-layer concrete containment and double-...

AI Technical Summary

Problems solved by technology

However, during the overhaul of the unit, the construction period is tight, and there are many cross operations in the ring corridor area, so the above-mentioned scheme of erecting scaffolding and using manual approach inspection cannot be adopted

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