Fuel pellet boundary dimension and apparent defect detection device and method

A technology for fuel pellets and external dimensions, which is applied in the directions of optical testing flaws/defects, measuring devices, analyzing materials, etc., can solve the problems of no application precedent in the production line of nuclear fuel elements, etc., and achieve the effect of simple method and ensuring safety.

Inactive Publication Date: 2016-07-06
CHINA NUCLEAR POWER ENG CO LTD
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  • Description
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Problems solved by technology

[0004] At present, the measurement technology based on visible light image recognition has no precedent in the nuclear fuel element production line, and it has not carried out simultaneous high-precision quantitative measurement of product size and defects in other industries.

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  • Fuel pellet boundary dimension and apparent defect detection device and method
  • Fuel pellet boundary dimension and apparent defect detection device and method
  • Fuel pellet boundary dimension and apparent defect detection device and method

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Embodiment Construction

[0061] The specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0062] Such as figure 1 As shown, the present invention is a device for detecting the dimensions and appearance defects of fuel pellets, which includes a mechanical device arranged in a glove box for transporting, rotating and positioning fuel pellets, and collecting the dimensions and dimensions of fuel pellets. Two image collection devices with appearance defects and an image processing system arranged outside the glove box for processing the images collected by the two image collection devices. The mechanical device includes automatic feeding and sorting device 2, automatic feeding device 3, automatic transfer device 4 and turning and rotating device 5, positioning device 9 and good and bad material sorting device 10.

[0063] Such as figure 2 As shown, the typical MOX fuel pellet 1 is a cylinder with a central hole in the center of...

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Abstract

The present invention relates to a fuel pellet boundary dimension and apparent defect detection device and method. The detection device comprises a mechanical device and two sets of image acquisition devices which are arranged inside a glove box and an image processing system arranged outside the glove box, and measures the diameter and the surface integrity of a fuel pellet automatically via the automatic ranking, feeding, transporting, rotating and discharging operations. The two sets of visual light image acquisition devices acquire the parameters of a cylindrical surface and two end faces of the fuel pellet respectively, and send the acquired complete cylindrical surface and end face images to the image processing system when the fuel pellet arrives at the detection positions orderly, and the image processing system analyzes, processes and determines the results automatically to sort the good and bad materials. The detection method comprises processing the boundary dimension images, the side surface images and the end face images. The detection device and method of the present invention can substitute for the manpower to finish the diameter and appearance integrity inspection of the fuel pellet automatically, and does not lose and cause the new damage during the inspection process.

Description

Technical field [0001] The invention belongs to the field of material detection, and specifically relates to a detection device and method for the shape and appearance defects of fuel pellets, and is mainly used for the detection of MOX fuel pellets. Background technique [0002] MOX fuel pellets are UO 2 Powder and PuO 2 The powder is the raw material, and the ceramic body is formed by mechanical mixing, pressing and sintering. As a nuclear fuel, it is widely used in pressurized water reactors and fast reactors. Excessive size of fuel pellets makes it impossible to install tubes. Excessive size and appearance defects will cause uneven heating of the fuel rod cladding, resulting in damage to the cladding and nuclear accidents. Because of this, before tube installation It is necessary to prove that the overall dimensions and appearance of each MOX fuel pellet meet the design requirements, and perform diameter inspection and 100% appearance defect inspection on all pellets to ensur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/08G01N21/95G01N21/88
CPCG01B11/08G01N21/8851G01N21/95G01N2021/8854G01N2021/8874G01N2021/889
Inventor 袁平刘明张雷李向阳马金波王长虹卢长勋李易蔚张楠
Owner CHINA NUCLEAR POWER ENG CO LTD
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