The NDE validation and demonstration testing process

Work done at the EPRI NDE center on a proposed definition of the qualification testing process is discussed and a brief summary of experience with the testing given. Testing of particular flaw types of concern in US nuclear plants has been accomplished through the use of test samples containing flaws representative of those of interest in the actual components. Validation Testing on ultrasonic testing inspection of intergranular stress corrosion cracking in BWR stainless steel piping and Demonstration Testing for ultrasonic testing inspection of near-surface flaws under the clad of PWR pressure vessels has been undertaken. The experience gained is very useful in understanding the complexity of this test process. (U.K.)