What is the risk from a nuclear power plant melt-down?
If you reach for the well known formula of Risk being the product of Likelihood and Consequence…then you are missing something big. That formula is going to give you some idea of hazard, as in the potential harm that can be estimated by science. Risk needs to capture so much more. You need to work out the hazard, then add the outrage.
Outrage is the overall negative human response to an event. How angry are people? How afraid? How upset? How emotionally charged? How suddenly and unusually ready to blockade, write letters, make signs etc? How prepared to change behaviour, take precautions (make no mistake, outrage has its place)?
The major outcomes of Fukushima have little to do with hazard and everything to do with outrage. Consider: