Study of Ultrasonic Techniques on the Inspection of NPP Components
This article provides results from an assessment of low-frequency phased array ultrasonic testing (PAUT) for detection of inside surface-breaking defects in dissimilar metal welds (DMW), centrifugally cast stainless steel (CCSS) and reactor internal pump (RIP) piping segments as applied from outer surface of the components. The evaluated specimens are typical of configurations installed in pressurized water reactors (PWRs) or advanced boiling water reactors (ABWRs). The coarse-grained and anisotropic microstructure of CCSS material makes it difficult to inspect such components. Similar inspection problems exist for dissimilar metal welds. The large grains of these materials strongly affect the propagation of ultrasound by causing severe attenuation, change in velocity, and scattering of ultrasonic energy. In this work, the effectiveness and reliability of advanced transmitter receiver L-waves phased array (TRLPA) technique on cast stainless steel material and other coarse-grained components that encompass dissimilar metal welds, ferrite piping with corrosion-resistant cladding and austenitic piping are determined. The results indicate that the TRLPA technique is reliable on these materials.
Phased Array Ultrasonic Dissimilar Metal Weld Cast Stainless Steel Coarse Grain
Chu-Chung HSIAO Nang-Chian SHIE Yung-How WU Shyr-Liang CHU
Industrial Technology Research Institute, Chinese Taiwan
国际会议
第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)
上海
英文
1469-1476
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）