It is necessary to confirm whether the feed water nozzle inside corner has crack by eddy current testing, to enable long-term operation of a plant. Therefore, we performed eddy current testing using various types of specimen to collect basic data (probability and length measurement accuracy) of the eddy current testing methods, complying with JEAG4217. As a result, eddy current testing was effective for the inspection of feed water nozzle inside corner. ...
英字タイトル:
Eddy current testing technique for feed water nozzle inside corner of nuclear reactor pressure vessel

The reliability of inspection results is affected by the skill of examination personnel, particularly with regard to manual ultrasonic testing (UT). The number and design of test specimens are among the most important points to be considered during training or assessing the qualification of UT examination personnel. In this study, we have developed a novel virtual UT system that simulates actual UT work for piping welds. This system (Tool for Realistic UltraSound Testing) consists of a dummy UT probe, ...
英字タイトル:
A prototype of the virtual UT test system for training of inspection engineer

In recent years, it has been reported that the primary water stress corrosion cracking (PWSCC) has occurred in dissimilar metal weld (DMW) components such as steam generator nozzle to safe end weld, reactor vessel nozzle to safe end weld, and so on, in PWR. The depth sizing of such cracks with high accuracy is important in order to ensure the reliable operation and life extension of nuclear power plants. Therefore, construction of the performance demonstration (PD) system for certifying DMW inspection ...
英字タイトル:
Investigation of Equivalency of Ultrasonic Response Relation between SCC and Non-SCC Crack in Dissimilar Metal Weld