I'm guessing the reactors are all cooling now, and they just need to wait till they cool enough. The problem now seems to be the containment pools for spent fuel. These pools are elevated above the reactor, so if the pools are damaged there isn't a simple way to fix it. They don't want to just dump water from above because the whole building might break up.

The fire at the number 4 reactor almost has to be burning fuel rods. That reactor was not only off-line but had the fuel rods removed from the reactor when the disaster hit, so the only thing there to be spewing radiation is the spent fuel rods.

As ugly as it would be, I think they are going to have to ask for volunteers to go in and deal with it. They are going to need fire fighting crews and engineering teams to jury rig repairs. It's going to be a suicide mission, but it's probably the only way now.

Jay