燃料包壳管超声波幅与缺陷深度对应关系

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Abstract As the sealing shell of fuel pellet, the fuel cladding tube operates in harsh environments such as high temperature, high pressure, strong radiation, circulating water erosion and corrosion for a long time. Once it breaks, the circuit will be polluted. In order to ensure the safety and reliability of the cladding tube, a variety of testing methods are often used in its manufacturing process, and ultrasonic testing is one of the most effective means of non-destructive testing and most widely used in engineering. Ultrasonic testing is mainly used to determine the acceptability of the cladding tube by comparing the reflected amplitude of natural defects in the cladding tube with that of standard injuries. According to the theory of ultrasonic testing, the reflection amplitude of natural defects is related to the shape, orientation, size (length, depth and opening width) of defects, and it is difficult to accurately determine the actual depth of defects only by the reflection amplitude of defects. Therefore, the relationship between the defect reflection amplitude and the defect depth in ultrasonic inspection of the fuel cladding tubes is studied. This paper uses the CIVA simulation software to study the relationship of the amplitude of the inner longitudinal defect and its depth. And the metallographic experiments for verification. The result shows that, the result shows that the relationship between the amplitude and the depth is comply the logarithm for the defects within the orientation from 0° to 68°. And the metallographic experiments result shows that the depth larger the amplitude is larger. At the same time, the simulation results and metallographic validation results fit well.

Key words： fuel cladding tubes ultrasonic inspection ultrasonic response depth of flaw

Published: 16 July 2021

CLC number:

TG115.28

About author:: Dan Li received his M.S. degree in June 2014 from Unclear Power Institute of China (NPIC). She was a Research Assistant with the research field of nondestructive testing(NDT).

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	LI Dan
	LI Shuliang
	CHAI Yukun
	LIU Jian
	LIN Zhenxia

Cite this article:

LI Dan,LI Shuliang,CHAI Yukun, et al. The Relationship Between Ultrasonic Response and Depth of Flaw of Fuel Cladding Tubes[J]. Materials Reports, 2021, 35(Z1): 473-475.

URL:

http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2021/V35/IZ1/473