Latest Technology of Non Destructive Inspection for Welded Structure

Abstract

As the Non Destructive Test (NDT) for the welded structure, PT(Penetration Test). MT(Magnetic Test), RT (Radioisotope Test) and UT(Ultrasonic Test) methods are widely used in practice. These NDT methods have been developed toward high efficiency, low cost, real time, and high precise new NDT. For example, RT methods are developed to CT(Computed Tomography)and DR(Digital Radiography), and UT metheds are developed into Phased array, Guide wave, TOFD method. Moreover, the Infrared thermography and Laser ultrasonic technique are newly developed for applying in high temperature objects as the non-contact NDT methods. In this review paper the new high efficiency NDT methods for the welded structure are introduced and the trend of NDT rules applying in welded structure are described.

Analysis of Foreign Substance Flow within the Weld Joint through Simulation in Pressurized Water Reactor Nuclear Fuel Rods

“…However, resistance butt welding carries the risk of radioactive material leakage from the welded joint due to various factors, such as the presence of radioactive substances generated by uranium fission, foreign substances, or defects in the weld, as well as stress concentration caused by plastic deformation. Therefore, it is crucial to accurately understand the welding mechanism/phenomena and ensure the reliability of the welded joint through various soundness confirmation tests [4][5][6][7].…”

Extracting Weld Bead Shapes from Radiographic Testing Images with U-Net

“…Non-destructive testing technologies are primarily used to determine the quality of the weld zone. Representative non-destructive testing technologies include radio-graph testing, ultrasonic testing, magnetic particles testing, liquid penetrant testing, eddy current testing, leak testing, and visual testing [1]. Radiographic testing and ultrasonic testing are especially used in the shipbuilding field [2].…”