OK, Oyester Creek, but then I have to assume that the most identifiable feature in the Fukushima building after the blast -- the intact square hole where the fuel casks are lifted by the crane, has been cut away from this drawing, correct?
Also, a small portion of the gate connecting the primary containment to the SFP is shown near the bottom of the transfer channel or "chute". If the scale is correct, it greatly reinforces my contention that the path of least resistance of a blast originating in the primary containment, outside of the RV would be through that gate (even if there are 2 of them, which does not appear to be the case) rather than out the top of the plug.
Notice the design. It appears to me that the logic behind a relatively thin-walled (concrete+ steel, or steel?) gate is that there is a large volume of water behind it, which under normal conditions, would tend to greatly reinforce the backside pressure on the gate at that point. If so, then here is another major design flaw. The reactor containment is compromised if the spent fuel pool is more than a few feet low on coolant. I suspect that the original designers considered an empty SFP with a hot reactor an unthinkable event. If so, then they should re-think that one.
Also, it occurs to me that if the overhead crane were parked at the north end of the building, it's weight would tend to bend the north end wall inward if the south, east and west walls were blown out, accounting for the under-folded north wall girders in our current pictures of Unit 3.
My conclusion:
Loss of water in the SFP greatly compromised the integrity of the reactor containment and the containment of the rods in the SFP when hydrogen and oxygen gasses in the reactor containment exploded. The dark smoke in the latest news release is ominous. I now fear that they may now have lost both the reactor core and the primary containment.
Someone please refute that.