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Nuclear fuel assembly underwater test platform and test method

A technology of nuclear fuel assembly and test platform, applied in the field of nuclear power

Active Publication Date: 2019-07-05
LINGAO NUCLEAR POWER +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, to provide a nuclear fuel assembly underwater test platform and testing method, which solves the problem that nuclear fuel assemblies can be tested underwater, and provides an underwater visual measurement for subsequent nuclear power plant fuel assemblies The system provides specific design basis

Method used

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  • Nuclear fuel assembly underwater test platform and test method
  • Nuclear fuel assembly underwater test platform and test method

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Embodiment 1

[0066] In this embodiment, the above-mentioned determination of the actual equivalent value is carried out on the water, and the final equivalent value is determined, that is, the distance between the camera and the object to be measured is determined, and the distance is kept constant, and the test platform is placed underwater. The influence of the underwater environment on the measurement results of the nuclear fuel height is tested. Since the influence of the above-water and underwater environments on the equivalent value is small, the influence of the environment on the equivalent value is not considered here.

[0067] Further, Table 2 and Table 3 represent the measurement results of the height difference between the upper and lower tube bases above water and underwater, respectively. The water medium here is ordinary natural water. Fix the distance between the above-water and underwater camera devices and the target, adjust the test platform to the best state, measure th...

Embodiment 2

[0076] In this embodiment, the mirror imaging principle is used to conduct an indirect imaging test on the target sample, and to verify the measurement accuracy. Preferably, in this test, the width of the upper nozzle of the nuclear fuel assembly is measured for the above-water and underwater conditions respectively. Move the slider to the upper end of the camera bracket, then fix it with the fixing device, and shoot the light from the camera on the reflector to make the light reflector present an object image. If the reflector does not present a full phase, you can use the second drive Components make it appear full phase in the mirror. Table 4 and Table 5 show the measurement results of the width of the upper pipe seat above water and underwater respectively. It can be seen from the comparison that the measurement results of the mirror imaging model and the direct illumination model are closer. Therefore, the mirror imaging model is the premise of enhancing the service life ...

Embodiment 3

[0082] In this embodiment, the nuclear fuel assembly test platform can also measure the integrity of the appearance of the nuclear fuel assembly. By creating defects on the surface of nuclear fuel assemblies such as roll marks, scratches, sticking, rusting (see Figures 5a to 5d ), reasonable selection of the camera device, artificial adjustment of the parameters of the camera device, and the cleaning image of the target object can be taken to realize the integrity detection of the target object surface. If the surface integrity of the target object is damaged, it can be detected by the camera probe and the defect site can be marked by software. From Figures 5a to 5d It can be clearly seen that the sample defects can be clearly detected, realizing the possibility that the test platform can detect the integrity of the appearance of defects underwater.

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Abstract

The invention relates to the technical field of nuclear fuel assemblies, and discloses an underwater test platform of a nuclear fuel assembly and a test method. The underwater test platform of the nuclear fuel assembly comprises a simulation water tank and an analysis part, wherein the analysis part comprises a transfer installation module, a detection module, a drive module and an analysis module; the installation module comprises an adjustable installation platform, a reflector substrate and a reflector base; the detection module comprises a to-be-detected object and a video camera; the drive module comprises a first drive part and a second drive part; the analysis module comprises a linear displacement sensor and a data analysis terminal. According to the underwater test platform of the nuclear fuel assembly and test method, through the installation module, the detection module, the drive module and the analysis module in the analysis part, underwater test o the nuclear fuel assembly becomes possible, and a specific design basis is provided for subsequent underwater vision measurement system of the nuclear power station fuel assembly.

Description

technical field [0001] The invention relates to the technical field of nuclear power, in particular to a nuclear fuel assembly underwater test platform and a test method. Background technique [0002] Irradiation has a significant impact on the performance of nuclear fuel and poses a challenge to the safety of power plant operations. With the increase of irradiation time, the chemical behavior of nuclear fuel and cladding will gradually change significantly, and affect its thermal and mechanical properties, such as the increase of oxygen / metal ratio leads to the decrease of thermal conductivity, the increase of pellet temperature and irradiation creep rate increases; the outer surface of nuclear fuel rods will cause cladding oxidation and corrosion product deposition due to the combined effect of irradiation and temperature, and corrosion will reduce cladding tube wall thickness and hydrogen absorption, and eventually lead to hydride precipitation, reducing material strength...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C17/00G21C17/10
CPCG21C17/001G21C17/10Y02E30/30
Inventor 陈军邓志燕费瑞银董鹏飞章安龙陈嘉杰吴玉李晓刘帅鹿帅
Owner LINGAO NUCLEAR POWER
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