Ageing nuclear reactors pose safety challenge: IAEA

(Reuters) - Significant progress was made last year in strengthening nuclear safety around the world, the U.N. atomic watchdog said in its annual review, despite the "challenge" posed by a large number of ageing reactors.

http://www.reuters.com/article/2013/07/15/us-nuclear-safety-iaea-idUSBRE96E0C820130715