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Nuclear fuel in three reactors at the Fukushima No. 1 nuclear plant has possibly melted through pressure vessels and accumulated at the bottom of outer containment vessels, according to a government report obtained Tuesday by The Yomiuri Shimbun. A "melt-through"--when melted nuclear fuel...

As a team from the Link Removed - Invalid URL visits Tokyo Electric Power Co.’s crippled nuclear plant today, academics warn the company has failed to disclose the scale of radiation leaks and faces a “massive problem” with contaminated water. The utility known as Tepco has been pumping...

A meltdown occurred at one of the reactors at the Fukushima No. 1 Nuclear Power Plant three and a half hours after its cooling system started malfunctioning, according to the result of a simulation using "severe accident" analyzing software developed by the Idaho National Laboratory. Chris...

We have at least three sources who believe that there is evidence of recriticality at Fukushima. What's troubling is that it is uncontrolled criticality. For those who don't know, this means the fission process is starting and stopping at random. Blue flashes of light have been witnessed at...

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...

Link Removed There have been two explosions at the Fukushima Daiichi nuclear power plant in Japan, following Friday's earthquake and tsunami, and a third reactor is reportedly at risk of fuel-rod meltdown. How great a danger do these problems pose for people in Japan and further afield? Has...