I became very skeptical about civilian nuclear power back when I was a Navy nuclear engineering officer in the Rickover program, aboard the aircraft carrier USS Enterprise (CVN-65), which had eight nuclear reactors. After a couple of years of sea duty, with shipyard maintenance periods from time to time, one of my colleagues and I were sent back to Washington DC to take the two-day chief engineer's exam (which we both passed). Before the exam, we were put through a one-week review course; one of the things we did was to play the what-if game with senior officers about various unpleasant scenarios that could occur --- things we hadn't covered in basic nuclear power school. That was eye-opening. I'm still not convinced civilian workers would operate safely enough without the ferociously zero-defects culture of the Rickover program and military discipline.

(Of course, this was in the late 1970s. I've not heard of any operator-error reactor accidents since Three Mile Island and Chernobyl, which is causing me to revisit my thinking.)