Originally Posted By: Eric
Reactor geometry is very carefully planned and it is at least equally if not more likely that the damage will actually make it harder to sustain Uranium Fission within the core.

Since they are admitting that significant percentages of the fuel rods at at least two reactors have melted and are presumably pooling at the bottom of the cores, I was wondering what happens to the material from the control rods or the boric acid. Would they mix in with the molten fuel and continue to suppress fission, or would they tend to separate out and not be so effective?

Is boric acid stable under the heat generated once the rods are uncovered? If so, you would think that the neutron dampening capacity would be increasing as they pumped in more and more sea water mixed with boric acid.

I was also reading that they are running out of boric acid. South Korean is sending a ship with more.