Coal kills thousands of people a year in the US (13,000 if you believe the extreme estimates)
Less than 20 people have died in Nuclear related accidents in the history of this technologies use. And almost every single one of those were unrelated to the nuclear technology itself (electrocution, other workplace accidents that could happen in any power plant)
If you want to lump in Chernobyl and Fukushima we are still only talking 3-4000 deaths in history. And there's zero reason to believe these accidents are likely to ever occur in the US.
So yes, there are "undeniable risks", but they are vastly vastly overstated.
Especially when the "undeniable risk" of climate change is many millions of deaths whilst climate change activists insist we can't use the only technology that can almost entirely eliminate cooking the planet via coal, oil and natural gas.