In the ultrasonic testing for periodic inspection of nuclear power plants, it is necessary to decide the inspection condition and probe scanning range before the inspection. Especially, ultrasonic propagation analysis was difficult for complex curved component such as nozzle parts. Therefore, we have developed an ultrasonic propagation simulation technique for three-dimensional complex curved objects based on the definition of curved surface functions and virtual scanner. We can examine appropriate ins...
英字タイトル:
Development of Ultrasonic Propagation Simulation Technique for Three-Dimensional Complex Curved Surface Shape

Visual testing with underwater camera is performed for the inspection of structures in RPV. It has the case to be difficult to identify whether the indication is the crack or the imitated shape like scratch. In this case, the judgment needs much time. In this issue, the distinction method by surface ultrasonic wave emitted on the structure have been developed. This method could perform the in-situ judgment between the crack and the imitated shape by ultrasonic imaging technique with array probe....
英字タイトル:
Inspection technique for surface cracking by ultrasonic wave to optimize in-vessel inspection