Not the OP but the crane incident was shortly after the first incident. The higher ups wanted to use the polar crane to lift a bunch of radioactive debris out of the core that almost melted down. At least one of the workers (Rick Parks) ended up whistleblowing over it because the crane was the same one that was there during the incident and most likely had taken damage. He was concerned the crane would fail while lifting the radioactive debris out (around 1000 lbs of it) and fall back onto the core. Check out the Netflix document Meltdown: Three mile Island for more info.
Yeah, that "shortly after"... the reactor top wasn't lifted off until FIVE YEARS after the accident.
So I ask again: just what horrible public-relevant accident is supposed to have nearly happened here? I can't imagine anything that would have caused anything catastrophic. The lid falling back onto the reactor vessel wouldn't be that.
They added large amounts of borate to the water before opening the top. There was no way it was going to go critical (and if it had, it would at best have been a steam explosion, not a nuclear bomb, as the chain reaction if it could have occurred at all would have been with slow thermal neutrons.)