[justa-hairyape]

The RPV’s are immaterial at this point in time. 3 core meltdowns. 3 RPV’s that no longer serve any function, except that they are caps to giant blow holes. The information we actually need, is not attainable or is classified. IE - The locations of the corium masses.

[NVDave]

If there had been a melt-down that had gone through the bottom of the reactor, it had to go through the bottom of the RPV first, before it could make it out of the bottom of the drywell.

Meaning: There wouldn’t be any temperature reading on the bottom of the RPV, because the sensors would be gone, along with the steel that makes up the RPV.

The corium is still in the RPV - resting on the bottom, same as happened at TMI.