Nuclear Reactor Blast

• Japan: Most plant workers evacuated, radiation levels rise

  Japan's nuclear crisis verged toward catastrophe on Tuesday after an explosion damaged the vessel containing the nuclear core at one reactor and a fire at another spewed large amounts of radioactive material into the air, according to statements from Japanese government and industry officials.In a brief morning address to the nation Tokyo time, Pri...

• Japan: Scramble at reactor after new blast

  The risk of partial meltdown at a stricken nuclear power plant in Japan increased on Monday as cooling systems failed at a third reactor, possibly exposing its fuel rods, only hours after a second explosion at a separate reactor blew the roof off a containment building. (Read: Second explosion at Fukushima nuclear plant)The widening problems unders...