Laser Ultrasonic System for Surface Crack Visualization in Dissimilar Welds of Control Rod Drive Mechanism Assembly of Nuclear Power Plant
Figure 9
Multiple damage visualization results for a 15 mm surface crack in the welding, freeze frames at (a) 29.4 μs of the UWPI video, (b) 140 kHz of the USI video, (c) 79 μs and 140 kHz of the WUPI video, (d) 46.8 μs of the horizontal AWS video, and (e) 49.2 μs of the vertical AWS video.
