Paper Title:
Application of Ultrasonic Phased Array Techniques for Inspection of Stud Bolts in Nuclear Power Plants
  Abstract

The reactor vessel body and closure head are fastened with the stud bolt that is one of crucial parts for safety of the reactor vessels in nuclear power plants. It is reported that the stud bolt is often experienced by fatigue cracks initiated at threads. Stud bolts are inspected by the ultrasonic technique during the overhaul periodically for the prevention of failure which leads to radioactive leakage from the nuclear reactor. The conventional ultrasonic inspection for stud bolts was mainly conducted by reflected echo method based on shadow effect. However, in this technique, there were numerous spurious signals reflected from every oblique surfaces of the thread. In this study, ultrasonic phased array technique was applied to investigate detectability of flaws in stud bolts and characteristics of ultrasonic images corresponding to different scanning methods, that is, sector and linear scan. For this purpose, simplified stud bolt specimens with artificial defects of various depths were prepared.

  Info
Periodical
Solid State Phenomena (Volume 110)
Edited by
Young-Jin Kim
Pages
97-104
DOI
10.4028/www.scientific.net/SSP.110.97
Citation
S. W. Choi, J. H. Lee, "Application of Ultrasonic Phased Array Techniques for Inspection of Stud Bolts in Nuclear Power Plants", Solid State Phenomena, Vol. 110, pp. 97-104, 2006
Online since
March 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Shi Lin Wu, Qi Zhang, Zhi Ping Huang
Abstract:To realize the configuration of a cymbal transducer array in an irregular region, Delaunay triangulation is adopted to mesh the irregular...
1085
Authors: Yu Zhang, Long Yu, Yun Ju Yan, Yu Guo
Chapter 3: Security and Life Cycle Engineering Design of Civil Engineering
Abstract:Over decades phased array antenna technique attracts much more attention in Lamb wave based structural damage detection. Lamb wave generated...
1667
Authors: Lukasz Ambrozinski, Tadeusz Stepinski, Tadeusz Uhl, Janusz Ochonski, Andrzej Klepka
Abstract:Guided waves (GW) based methods are a promising tool for structural health monitoring (SHM) of plate-like metallic and composite structures...
87
Authors: Jing Huang, She Yu Zhou, Pei Wen Que
Chapter 12: Inspection and Control Systems, Testing, Instrumentation and Measurement
Abstract:A novel automatic ultrasonic system used for the inspection of welds in T nodes is developed, in which a linear phased array transducer using...
1524