Wall thickness measurement of piping using electromagnetic acoustic resonance method and its application to nuclear reactor cooling system
高木 敏行 内一 哲哉 浦山 良一 孫 宏君 （東北大）
electromagnetic acoustic resonancemonitoring systemnondestructive testingpipe wall thinningthickness measurement
In this study, we developed a method to measure pipe wall thinning by electromagnetic acoustic resonance method (EMAR) which is one of electromagnetic ultrasonic method. The EMAR can evaluate the thickness of piping with high accuracy. In addition, we propose a method to obtain the resonance frequency with high accuracy when the thickness reduction progresses and the SN ratio decreases. We applied the technology to PWR and BWR pipings and examined its applicability.