[sionnsar]

Can they dump a bunch of graphite control rods into the reactor core and shut it down that way? Or have they already tried that by now? Just wondering.

From what I understand, it shut down immediately. But will take a LONG time to cool the core to below meltdown temps.

[rahbert]

All the boron moderator will do is soak up the neutrons and stop the reaction. the heat is still
in the core and will warp it if it gets too hot. if the
control rod holes are warped scramming won’t be possible.
They could dump powdered/liquid moderator directly into
the vessel as a last resort. the people tasked with doing that would be national heros giving their lives for their
country, like the reactor watch on K-19.