While your point is important, keep in mind that the value of nuclear safety (like so many other things the market puts a price on) is entirely determined by what people think. If they think the hazards are significant, because they hear alarming rhetoric, because the hazards actually are significant, or for any other reason, the value will reflect what they think. Regulations like the Price-Anderson Act[0] then formalize this value as insurance and construction and operational expenses, essentially defining many of the economics.

[0] http://www.naic.org/cipr_topics/topic_nuclear_liability_insu...