The question is not whether nuclear reactors are safe. They are dangerous and cause accidents that cause death and injury.

But, that's true of literally every source of energy. You have to look at the danger posed holistically.

And the fact is, the actual realized danger posed by old generation nuclear is orders of magnitude less dangerous than every fossil fuel source, even when accounting for major disasters like Chernobyl and Fukishima. https://ourworldindata.org/safest-sources-of-energy

In light of this data, it seems to me that any decision to avoid nuclear that leads to more fossil fuel burning, which is almost always what happens when we prematurely shut down nuclear plants, is almost criminally the wrong choice.