Good point, oren. It may be that nukes are the perfect power source for a race that is always well organized, peaceful, efficient, uncorruptible, ever competent...Oh, and where extreme earthquakes, tsunamis, mega-droughts, super-heatwaves...never occur.
But that is not the world we live in. In fact, it is a very bad fit for the world we actually live in where history and simple observation shows that, even though there are periods in some places where peace and organization may prevail, it is a dead certainty that at some point in every location that coherent condition will break down into:
corruption, incompetence, arrogance, venality, drunkenness, greed, negligence...
further decaying inevitably at some point into discord, confusion, anarchy, war...
Given these unalterable facts, even leaving aside the additional inevitability of natural disaster, made even more certain by escalating effects of GW (aslr anyone?), nukes are in fact among the very worst choices for energy sources one could imagine for the real world of men and history and folly that we actually do inhabit here on this flawed orb.