Inventors:
Nick Yaroshuk - White Oak PA
Miklos Sarkozi - Murrysville PA
Eugene G. Vaerewyck - Murrysville PA
Assignee:
Westinghouse Electric Corp. - Pittsburgh PA
International Classification:
G01N 2122
Abstract:
This invention is an improved method for scanning for flaws on a surface utilizing dynamic correction. Each individual scan signal is divided into a large number of increments, each increment representing a predetermined position in the scan. A dynamic average is computed for each of the scan positions and flaws are detected by comparing the increment signals to the dynamic average signal for the same position. This technique is especially useful to detect flaws on high quality tubing, such as used for nuclear reactor fuel rods or for nuclear reactor steam generator tubing.