Hanbit Nuclear Power Plant Unit 2 has identified 24 linear indications on a circumferential weld on the upper outer surface of its core support barrel during the reactor's 28th planned preventive maintenance outage. The indications were found during a visual inspection using imaging equipment, but they do not by themselves establish cracking or structural damage.
Korea Hydro & Nuclear Power plans ultrasonic testing to determine whether actual defects exist, assess their depth and distribution, and carry out repairs and a structural integrity evaluation as needed.