Nuclear Reactor, Natural Disaster | featured news

The last-ditch move indicates that the backup cooling system in a second quake-damaged reactor has failed. Japanese officials say radiation levels at another reactor being pumped with seawater have fallen, but hydrogen gas is building in a third.

An explosion at a nuclear power station Saturday destroyed a building housing the reactor amid fears that it could melt down after being hit by a powerful earthquake and tsunami.

Japan declared states of emergency for five nuclear reactors at two power plants after the units lost cooling ability in the aftermath of Friday's powerful earthquake. Thousands of residents were evacuated as workers struggled to get the reactors under control to prevent meltdowns....