Three meltdowns at the Fukushima Daiichi disaster, and two hydrogen explosions. Proper end-of-the-world TV; watch two nuclear power stations blow up. One of the explosions blew tonnes of spent fuel about a mile in the air; the design was that the pool for cooling fresh spent fuel was in the space above the reactor.
I don’t think it killed that many people though. The tsunami was far worse, and washed a load of other toxic industries into the ocean too. Nuclear is just part and parcel of everything else we’re doing, more and faster all the time.
Nuclear power could be done far better than it is.