No, the mushroom cloud does not get a pass. There is nothing inside nuclear power plants that could create it. They do use ²³⁵U but in a way too low concentration so the rate of fission is greatly limited, and the worst thing that can happen, even in obsolete reactors without inherent regulation, is overpressure and conventional explosion that releases heavy isotopes from the reactor.
No, the mushroom cloud does not get a pass. There is nothing inside nuclear power plants that could create it. They do use ²³⁵U but in a way too low concentration so the rate of fission is greatly limited, and the worst thing that can happen, even in obsolete reactors without inherent regulation, is overpressure and conventional explosion that releases heavy isotopes from the reactor.
(I know, I was trying to be generous)
Bit of a distraction from the point: this comic is not funny.
I thought it was funny.