There is conflicting info here on that (some other freeper posted that there was fuel in spent fuel pool). But it is important to keep in mind that the spent fuel in the pool is trivial to keep cool compared to the core. It doesn’t burn. It is not producing lots of neutrons that would cause other rods to in the pool to heat up. It is simply not going to be an issue.
I suspect that the cesium detected may have came from the fuel pit at the top of the outer containment building — from the explosions. Why do you say it wouldn’t be an issue? What’s the heat load? When were the reactors last fueled or unloaded? Do you know?
So you think the article by the nuclear enigineer with 30 years in the field I posted is nonsense and just not true. The when he says that the spent fuel rods, if they cannot have influx of water and the heat exchange happening due to lack of electicity, can indeed melt and burn, he’s wrong? Why is this not a danger? Details, not just because you say it isn’t.