FILE PHOTO: The Kori No. 3 reactor of state-run utility Korea Electric Power Corp (KEPCO) is seen in Ulsan, about 410 km (255 miles) southeast of Seoul, September 3, 2013. Picture taken September 3, 2013. REUTERS/Lee Jae-Won
FILE PHOTO: The Kori No. 3 reactor of state-run utility Korea Electric Power Corp (KEPCO) is seen in Ulsan, about 410 km (255 miles) southeast of Seoul, September 3, 2013. Picture taken September 3, 2013. REUTERS/Lee Jae-Won