Development of heat resistant ultrasonic probe for continuous wall thickness measurement and remote measuring equipment
酒井 裕介 吉田 正志 松下 義昭 （東京電力HD）
Condition-Based MaintenanceDry couplingIoTNondestructive inspectionOn-line monitoringPipe wall thinningReduction of radiation exposureRemote monitoringUltrasonic testing probeWall thickness measurement
Pipe wall thickness in power plant have been measured during the periodic inspection to evaluate soundness and safety by Ultrasonic Testing (UT). But it takes a long time and man power to complete measurement and evaluation. In this study, “Flex Dry UTM” is developed as a new kind of UT system for making it possible to monitor pipe wall thickness continuously. It is attached directly to pipe under the lagging material without using coupling medium. The maximum temperature it can be applied is developed to be 473K so that on-line monitoring can be performed during plant operation. Furthermore, UTM remote measuring equipment is developed to make it possible to monitor continuously by wireless communication.