daichi plant. official believe 2 of the 6 reactors there may have been a partial meltdown. i stress partial in 2 of the 6 reactors but they can t confirm that at this point because it is simply too hat insiot inside th reactors to check and they re pumping in sea water. jim, explain what that means, a partial meltdown in two reactors. well, i know when people hear the world meltdown, anderson, they get very panicky and think about that think about chernob chernobyl, they think about three-mile island but there is a continuum here. you can have partial meltdowns. that s very different than the consequences you would have if you had a total melt dodown. with a total meltdown, fuel rods cash fire, melt an congregate at the bottom of the reactor vessel and when they do that, they you get what s called a