As far as I can tell the single most deadly power plant disaster in history was the 1975 Banquiao Dam failure[0] that killed 26000 to 240000 people. Yet when you try to google "most deadly power plant disasters" you'll mostly get Chernobyl with 100 attributed deaths.
There is something poignant that nuclear apocalypse is better for the environment than human civilization as it normally functions.
Are you sure you're not discounting that figure because it's contrary to your conclusion? Very few people have ever died as the indirect long-term result (let alone by direct immediate result) of nuclear energy accidents, even according the highest estimates from histrionic ideologues like Greenpeace.
The relative risk of nuclear to coal is unbelievably low yet there is still this irrational ability to weigh risk/reward benefits correctly.
That's how coal plants operate.