Nuke Experts: Japan May Have Only Hours Before Meltdown

Worse news from the Fukushima plant - the facility has experienced a "station blackout", meaning all cooling mechanisms have halted. This is "one of the most serious conditions that can affect a nuclear plant," says the Union of Concerned Scientists.

And if cooling dies completely? A meltdown shortly thereafter. Japanese nuclear experts are scrambling to maintain the flow of coolant through portable generators - let's hope it works. [Reuters]

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