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Ultrasonic NDE for Irradiation-Induced Material Degradations

[+] Author Affiliations
Yoshihiro Isobe, Junji Etoh, Mitsuyuki Sagisaka, Takashi Matsunaga

Nuclear Fuel Industries Ltd., Osaka, Japan

Paula Freyer

Westinghouse Electric Company LLC, Pittsburgh, PA

Frank Garner

Radiation Effects Consulting, Richland, WA

Taira Okita

The University of Tokyo, Tokyo, Japan

Paper No. ICONE21-16850, pp. V001T02A048; 5 pages
  • 2013 21st International Conference on Nuclear Engineering
  • Volume 1: Plant Operations, Maintenance, Engineering, Modifications, Life Cycle and Balance of Plant; Nuclear Fuel and Materials; Radiation Protection and Nuclear Technology Applications
  • Chengdu, China, July 29–August 2, 2013
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 978-0-7918-5578-2
  • Copyright © 2013 by ASME


We have developed a prediction model of ultrasonic wave changes caused by microstructural changes in 304 stainless steel based on the theory of ultrasonic wave propagation and experimental results. The correlation between microstructure and ultrasonic waves was simulated in the model with microstructure components such as grain boundaries, voids, precipitates and dislocations taken into account. Material parameters used for the prediction model were determined from the literature, microscopic observations, and experimental results obtained from archive materials.

Calculations were performed assuming respective and integrated changes of irradiation-induced microstructures and spectrum changes of ultrasonic signals due to microstructural changes were evaluated. Calculations for archive material were also performed for validation, and the results were reasonably consistent with experimental data. It was found that by selecting appropriate indicators one can identify the nature of microstructures and quantify the microstructural changes due to irradiation.

Copyright © 2013 by ASME



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