Abstract

Internal defects are mainly caused by a corrosive action and degradation in the pipe used in a nuclear power plant or factory. The ESPI method have the many advantages when compared with conventional method. The advantage are the area measurement ability at one time and non-contact measurement ability in the real-time. In this paper, we studied on the measurement of a internal defect by using out of plane ESPI technique. Here, we compared the experimental results using out of plane ESPI with the FEM results.

• Keywords: ESPI(Electronic Speckle Pattern Interferometry,전자기적 스페클 패턴 간섭법),Pressure Vessel(압력용기),Internal Defect(내부 결함),FEM(Finite Element Method,유한요소법)