Identification of Ultrasonic Anamorphic Wave Caused by Cladding of Pressure Vessel of Nuclear Power Plant

The anamorphic wave reflection caused by cladding was introduced when the welding under cladding was tested of pressure vessel of nuclear power plant. The causing principle of anamorphic wave and location method was analyzed. On a cladding weld, test was carried on for verifying the analysis. Verification results proved the accurate of the mentioned method which could widely used on the false single identification caused by anamorphic wave.