because there is not much they really can do, they have sent 3 robots in already to assess the core and around it, all 3 have melted!
also they don't want to shut it down! if thats the case fuck them, but its affecting everyone else.
not to mention, all the spent rods that are sitting in water, if the cooling system were to fail, the whole world would be doomed
but this is the case for most countries with nuclear power, this is roulette all countries are playing, lets just hope that none of these countries have a major power blackout longer than a week (max length of time before meltdown)