Fuel assembly deformation detection system based on underwater binocular vision

Abstract

The invention discloses a fuel assembly deformation detection system based on underwater binocular vision. The system is composed of two parts including an underwater binocular array acquisition sub-system and a parameter three-dimensional measurement sub-system; the underwater binocular array acquisition sub-system includes two sections; the sections are connected through a threaded clamping buckle; global data acquisition of a large assembly is realized; each section includes four sets of binocular acquisition modules; a uniform light source module is configured between adjacent modules; sufficient illumination is provided for assembly imaging in a corresponding view field; the critical area of the assembly is imaged on a corresponding CMOS sensor through an optical lens; the system realizes synchronous acquisition of eight sets of binocular acquisition modules through a hardware triggering module; and thus, three-dimensional measurement of various key parameters of a fuel assembly can be realized. According to the fuel assembly deformation detection system based on underwater binocular vision in the invention, three-dimensional sizes of the key parameters of the fuel assembly can be obtained; furthermore, the overall outline of the assembly can be measured; and thus, a powerful tool is provided for parameter measurement of high-temperature and high-radiation underwater spentfuel assemblies, such as local deformation and overall bending.

Description

technical field [0001] The invention belongs to the technical field of nuclear radiation safety and monitoring, and relates to a fuel assembly deformation detection system based on underwater binocular vision. Background technique [0002] The fuel assembly is composed of a number of fuel rods, control rod guide tubes, upper and lower tube sockets, grids, etc., and is the energy source for nuclear power generation. Fuel assemblies (which are continuously bombarded by neutrons during use, and are called spent fuel assemblies after one cycle of use) work in the high-temperature, high-pressure, and high-radiation circulating water of the reactor. Due to the influence of assembly stress, thermal stress, and radiation growth and other factors, Fuel rods deform locally during use, which in turn changes the shape of the entire fuel assembly. Under harsh working conditions, spent fuel assemblies generally have a certain amount of deformation. When the amount of deformation is too l...

AI Technical Summary

Problems solved by technology

However, the above-mentioned system is sensitive to the placement angle of the fuel assembly, and needs to be compared with the calibration plate every time it is used, which is time-consuming and labor-intensive. In summary, all kinds of systems are currently unable to accurately measure the key parameters of the spent fuel assembly under harsh working conditions

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