Ultrasonic Examination Research of Cracks Under Stainless Steel Cladding for Nuclear Components

Through the research for characteristic of stainless steel cladding and influence to ultrasonic examination due to the cladding, and theory analysis & experiment research for ultrasonic examination of crack under cladding, the ultrasonic examination technology under cladding is determined. TRL 60°/2 MHz and 70°/2 MHz are used for detection of crack under cladding, and TRL 45°/4 MHz is used for sizing of crack under cladding. This UT technology for detection and sizing for cracks under cladding for Nuclear Power Plant’s components is viable.