Reactor 3 gone away.

Iam335, I have pondered this question alot, done hours of calcs, viewed all the pictures I could easily obtain.

It appears that the Reactor 3 is completely gone, just a few scraps of yellow metal in the rubble.   If this is true, then would the SFP have blown up in the same instance, or at a different time and if so, where is that evidence?

Or alternately, if the SFP blew up could it have completely destroyed the reactor (like 3" to 8" thick steel), or caused the reactor to simultaneously blow  up too?

Riddle me this, answer me thus and here if you would...