I heard this am that they could not pump in the seawater fast enough to cover the core. It was evaporating.
Kind of impressive thinking how much energy that is considering all the control rods are in place and this is the residual heat, just a tiny percentage of what it puts out when operating normally.
What I can’t figure out is how they keep things from cracking and breaking when you start dumping cold sea water on something that hot, the contractions in size alone must have a lot of very close tolerance equipment moving all over the place.
It's then likely the rod shielding has been compromised.
Very bad news.