The International Atomic Energy Agency has begun a two-week inspection of South Korea's second nuclear power reactor, Wolseong's No. 1 reactor.
The inspection was started in response to increased anxiety over nuclear safety following the Fukushima Daiichi nuclear disaster in Japan last year.
A team of experts led by an IAEA official will inspect the reactor from 29 May 29 to 7 June on invitation of operator Korea Hydro & Nuclear Power (KHNP).
The Wolseong No. 1 reactor's design life expires in November.
Nuclear Safety and Security Commission will decide whether to permit the reactor to operate for another ten years.