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For the first time Japan has suggested the situation at the Fukushima nuclear plant has gone beyond a meltdown. Japan says that nuclear fuel in three reactors has possibly melted through the pressure vessels and accumulated in the outer containment vessels. Japanese media report this...

The International Atomic Energy Agency weighed in on the simmering nuclear crisis with alarming radiation data, but the government said Thursday it has no plans for now to expand the current evacuation zone. The international nuclear watchdog said Wednesday in Geneva it detected about 2...

Electricity has been restored to three reactors at the Japanese nuclear plant wrecked by fire and explosions after the 11 March quake and tsunami. However the cooling systems are not yet operating, and the UN nuclear watchdog, the IAEA, says the situation remains "very serious". Some workers...

Japan has reclassified the situation at the Fukushima nuclear plant, now placing it at five on the International Nuclear Events Scale. A level four event is classified by the International Atomic Energy Agency as being an accident with local consequences, while a level five incident is...