The purpose of this study is to quantitatively evaluate the aging status of epoxy coating onto containment structure in nuclear power plant. Prior to main accelerated aging test, pre-test under short term acceleration was performed to identify the rel...
The purpose of this study is to quantitatively evaluate the aging status of epoxy coating onto containment structure in nuclear power plant. Prior to main accelerated aging test, pre-test under short term acceleration was performed to identify the reliability of relation between visual and ultrasonic testing results. Time-dependent degradation results of epoxy coating taken by VT were different from results taken by UT. According to aging acceleration factor, degradation pattern of epoxy coating by VT was similar not only to that by UT, but also to that by elongation change. The possibility to develop new methodology for investigation of time-dependent epoxy coating was identified.