Human error. Which human history demonstrates thoroughly is the norm rather than the exception. With nuclear and similar technologies, human error has unprece

Human error. Which human history demonstrates thoroughly is the norm rather than the exception. With nuclear and similar technologies, human error has unprecedented scope of impact. Until we "fix" the human error (and short-sightedness, and durability of institutions and civilizations), I remain convinced that large-scale deployment is a recipe for disaster -- sooner or later. At a minimum, designs should be default power-down and containment until quite dead. If humans fail to keep the system running properly, its default behavior is shut-down and isolation until radiologically cold. Necessary designs that can't accomplish this should be government level projects limited in scope and with very clear mandates including hard shut-down horizons and over-generously endowed orthogonal cost trust funds. We can afford this. It's a question of whether we want to. Put the true costs up front -- not passed on to future generations. Decide then what parts are "worth it." P.S. Additionally, the uranium mining aspect seldom gets addressed. Hardly "clean", itself. Just ask the Navajos, for just one example.