Nuclear fuel subassembly video detection method and detection device

A nuclear fuel assembly and video detection technology, applied in the field of nuclear power generation, can solve problems such as poor detection accuracy and misjudgment, and achieve the effect of reducing errors and high judgment accuracy

Active Publication Date: 2015-10-28
CHINA NUCLEAR POWER TECH RES INST CO LTD +3
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Problems solved by technology

[0004] However, in the above-mentioned fuel detection video detection method, the determination of the degree of deformation of the nuclear fuel assembly requires the operator to judge

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  • Nuclear fuel subassembly video detection method and detection device
  • Nuclear fuel subassembly video detection method and detection device
  • Nuclear fuel subassembly video detection method and detection device

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Embodiment Construction

[0033] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

[0034] refer to Figure 2 to Figure 6, the present invention discloses a nuclear fuel assembly video detection device 200, including a camera body 21, a distance calibration device, a controller 22 and a control panel 23, refer to Figure 2 to Figure 5 , the camera subject 21 includes a camera 31 and a lighting lamp 32, and the camera subject 21 extends into the spent fuel pool and collects video images of nuclear fuel assemblies 40; the distance calibration device is set in the shooting area of ​​the camera Distance calibration for at least two actual distance determinations. refer to Figure 6 , the controller 22 includes a control unit 221, an image processing unit 222 and a size calculation unit 223, the control unit 221 controls the...

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Abstract

The invention discloses a nuclear fuel subassembly video detection method. The nuclear fuel subassembly video detection method comprises following steps: (1) distance calibration in a photographed area is carried out, and nuclear fuel subassembly video images are collected; (2) the video images are processed, displayed, and stored, two calibration points of distance calibration in the video images are determined, and a measuring area in the video images is acquired; (3) the size of the measuring area is calculated, wherein actual calibration distance Lb between the two calibration points is acquired, image calibration distance Np between the two calibration points in the video images is calculated, image defect size Nc in the measuring area in the video images is calculated, and actual defect size Lc of the measuring area is calculated and stored based on the actual calibration distance Lb, the image calibration distance Np, and the image defect size Nc. The nuclear fuel subassembly video detection method can be used for observing situations of nuclear fuel subassemblies via video images, calculating defect size in the nuclear fuel assemblies, accurately determining that whether deformation of the nuclear fuel subassemblies is caused, and determining deformation degree accurately.

Description

technical field [0001] The invention relates to the field of nuclear power generation, in particular to video detection of nuclear fuel assemblies in nuclear power stations. Background technique [0002] The nuclear fuel assembly is composed of nuclear fuel rods, nuclear fuel assembly grids, compression springs, upper tube holders and lower nozzle holders. The fuel cladding houses the nuclear fuel rods, isolates the fuel from the coolant, and contains fission gases. It is the first barrier to prevent the escape of radioactive particles. During normal operation, due to thermal expansion, densification, swelling, cracks and released fission gas of nuclear fuel rods, the fuel cladding may be deformed and ruptured, resulting in an increase in the radioactivity of the primary circuit coolant. Therefore, it is necessary to carry out necessary inspections on nuclear fuel assemblies. When the nuclear fuel assembly is damaged, replace the nuclear fuel assembly in time. [0003] Si...

Claims

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Application Information

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IPC IPC(8): G21C17/007G21C17/01G21C17/07H04N7/18
CPCY02E30/30
Inventor 刘青松乔素凯黄鸿志华先峰李春常邓志燕张涛余冰周国丰黄文有
Owner CHINA NUCLEAR POWER TECH RES INST CO LTD
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