Laser Ultrasonic System for Surface Crack Visualization in Dissimilar Welds of Control Rod Drive Mechanism Assembly of Nuclear Power Plant
Figure 8
Adjacent wave subtraction process using signals obtained at (a) (14.0, 12.3) and (14.1, 12.3), horizontal AWS; (b) (14.0, 12.3), (14.0, 12.4), and vertical AWS on the surface crack; and (c) (40.0, 34.2), (40.0, 34.3), and vertical AWS on the intact area.
