The main argument against nuclear is that it absolutely requires a highly educated, well organized society and workforce. If something really serious disrupts our elaborated, complex societies, then nuclear plants will become really dangerous. With looming climate change, energy crisis, overpopulation and other problems, you can't be sure that we'll be in a stable enough world long enough to be completely safe.
It's a shame there's no avherald for nuclear power, I bet it would be an interesting read. C. Perrow had access to industry journals when documenting the chapter on nuclear in his "Normal accidents" book. The incidents described there were mind-boggling.