Computational Analysis on ESPI Inspection for Aged Power Plants

摘要

Some of the Japan's oldest nuclear generation plants are now entering their 30th year, which is close to their designed lifespan. In such a circumstances, in-situ flaw sizing and repairs are urgently required. Accordingly, laser ESPI flaw detection method was developed and remote inspection on SCC (Stress Corrosion Cracking)using laser holography realize cost- and time-effective in-situ inspection for aged nuclear power plants. Principles of pulsed ESPI detection was demonstrated qualitatively by finite difference method on two dimensional model.