The US had Three Mile Island. Japan had Fukushima.

One of the biggest arguments against nuclear is that reactors are insanely complex. Beyond a certain level of complexity, safety and predictability become impossible even with perfect management - which certainly doesn't exist in the nuclear industry.

This is especially true of any nuke system which needs external cooling, because stable water levels aren't a given any more because of climate change. Between floods, droughts, and storm surges, the environment is part of the system - something Fukushima discovered to its cost.