There's plenty of irrational fears about nuclear power, but there are also valid significant doubts about it. And this isn't really that much about the technology, but especially about everything around it.

We haven't managed to decide on a place to store the nuclear waste, and all the plans decades in making have been thrown overboard entirely a few years ago. This is more of a political failure, but if we can't manage to fix this part in decades maybe we shouldn't produce even more nuclear waste we have no place to put.

How economical is it, if you include the costs of removing the irradiated plant in the end. It's kinda impossible to get unbiased numbers here as everyone has an agenda, but you can't just ignore that part of the costs and put it on the public.

The safety is a combination of the technology and the people and processes running the entire thing. I personally the technology is probably something we could figure out well enough, but I don't have that much trust in the softer parts here for a technology where you have a very small risk for a very large amount of damage.