Vacuum Speckle Interferometry For Long Term Monitoring Of In-Plane Strains At Defect Sites In Nuclear Pressure Tubes

10 September 1987

proceedings article
Published by SPIE-Intl Soc Optical Eng

Vol. 746, 113-120
https://doi.org/10.1117/12.939772

Abstract

Vacuum speckle interferometry can be used for long term monitoring of local deformation and strain in the vicinity of hydride blisters as they evolve on the surface of hot samples of zirconium pressure tubes used in nuclear reactors. A video camera and frame grabber were used to provide computer access to the speckle pattern for fringe pattern extraction, image processing, and data analysis. Evidence was seen for strain around the blister during thermal expansion, and for change of strain with time when heated. Decorrelation could be seen at the blister edge as it dissolved at 340 C.© (1987) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

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