Field Evaluation of Low-Frequency SAFT -UT on Cast Stainless Steel and Dissimilar Metal Weld Components

摘要

This report documents work performed at the Pacific Northwest National Laboratory (PNNL) in Richland, Washington, and at the Electric Power Research Institutes (EPRI) Nondestructive Examination (NDE) Center in Charlotte, North Carolina, on evaluating a low-frequency ultrasonic inspection technique used for examination of cast austenitic stainless steel (CASS) and dissimilar metal (DMW) reactor piping components. It should be noted that this work predates efforts recently published in two reports: NUREG/CR-6933, Assessment of Crack Detection in Heavy-Walled Cast Stainless Steel Piping Welds Using Advanced Low-Frequency Ultrasonic Methods, published in March 2007 (Anderson et al. 2007), and NUREG/CR-6929, Assessment of Eddy Current Testing for the Detection of Cracks in Cast Stainless Steel Reactor Piping Components, published in February 2007 (Diaz et al. 2007). The results of the earlier work are being published because it was conducted semi-blind and will be a valuable source of information relative to performance demonstration assessments.