Here's a list of industrial disasters. Take your pick of the ones that count as engineering or negligence (and Chernobyl was at least as much negligence as engineering) and tell me how many you get to.

Of course, we haven't discussed what kind of risk we're talking about. And is it better to have thousands of low-impact high-risk activities or one or two high-impact low-risk activities? Because, make no mistake, nuclear has cost less in human lives per unit of energy than any other power generation method we have. And hydroelectric has as profound an impact on the environment as nuclear fallout, it just tends to make some nice beaches and fishing so it isn't negative, right?