Automatic detection system and method for hollowing in steel lining of nuclear reactor containment

Abstract

The invention discloses automatic detection system and method for hollowing in a steel lining of a nuclear reactor containment. The system includes a wall-climbing robot and an intelligent terminal, which are connected to each other. A knocking apparatus and a sound collection module are arranged on the wall-climbing robot. The wall-climbing robot climbs all over on the inner wall of the nuclear reactor containment and knocks the inner wall by means of the knocking apparatus, wherein the knocking sound information is collected by the sound collection module in real time and is sent to the intelligent terminal; the intelligent terminal then controls the wall-climbing robot to move on the inner wall of the nuclear reactor containment and receives the sound information and detects whether hollowing exists or not between the steel lining and the inner wall according to the sound information. The system and method can automatically detect the swelling in the steel lining of the nuclear reactor containment and are reduced in detection cost and improved in detection efficiency and quality, and are extensively applied to the field of auto-detection computing.

Description

technical field [0001] The invention relates to the field of automatic detection, in particular to a system and method for automatic detection of hollow steel inner lining of nuclear reactor containment shell. Background technique [0002] The main function of the steel lining on the inner surface of the containment of the nuclear reactor building is to shield radiation and ensure the tightness of the containment. In order to test the ability of the containment to withstand design basis accidents in terms of sealing performance, it is verified that the containment can maintain structural integrity during design basis accidents. Integrity and tightness require regular integrity experiments on the containment structure, and the defect detection of the steel lining is one of the main contents in the integrity experiment process. [0003] The defect of the steel lining is mainly manifested as the hollowing of the steel lining and the inner wall of the containment vessel. This de...

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Problems solved by technology

[0003] The defect of the steel lining is mainly manifested as the hollowing of the steel lining and the inner wall of the containment vessel. This defect will lead to the weakening of the sealing and radiation shielding performance of the steel lining. If the hollowing phenomenon is serious, it may lead to safety accidents inside the containment vessel. Therefore, during each refueling overhaul, the hollowing of the steel lining must be checked

[0004] The nuclear reactor building containment is mainly composed of a cylindrical containment and a hemispherical containment top. The inner diameter of the cylindrical containment is about 40m, and the height is about 60m-70m. However, the current detection method for the nuclear reactor building containment is still Using manual detection methods to carry out detection by setting up scaffolding and hanging baskets is undoubtedly a large-scale project, which not only consumes time and money, but also may have artificial detection loopholes, and workers work at high altitudes. inherently dangerous

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