Land based commercial nuclear power is the safest form of electricity production ever created. No one died as the result of radiation exposure at the Fukushima nuclear facilities in Japan-- despite three meltdowns-- thanks to the inherent safety of the containment structures. But even if you include the mortality rate of the Chernobyl nuclear accident which didn't have a containment structure, the mortality rate for commercial nuclear energy is 90 deaths per trillion kWhr compared to:
Wind, 150 deaths per trillion kWhr
Rooftop solar, 440 deaths per trillion kWhr,
Hydroelectric, 1400 deaths per trillion kWhr
Natural gas, 4000 deaths per trillion kWhr
Coal, a whopping 170,000 deaths per trillion kWhr.