Nothing is risk free. The nice thing about nuclear power is that radiation is really easy to detect, with you know, a Geiger counter.
On the other hand, particulate matter emitted by oil and coal plants causes millions of deaths per year, right now. And CO2 emissions from oil, gas and natural gas are bringing us to the brink of an environmental catastrophe.
What's the systemic risk of solar panels and wind power, for example? A terrorist attack destroying 100 millions solar panels?
> On the other hand
The usual false dichotomy between nuclear and oil/coal/gas.
> And CO2 emissions from oil, gas and natural gas are bringing us to the brink of an environmental catastrophe.
...not to mention the direct release of heat into the atmosphere due to poorly isolated house heating, industrial production and electric generation plants themselves. None of which is mitigated by nuclear. Rather, it's made even worse by any source of cheap electricity.
Nuclear power plants are designed to withstand attacks from crazies. Terrorist attacks done so far have had minimal impact on infrastructure. It is a very minor and manageable threat.
Release of heat due to chemical and nuclear sources does heat the planet, but the contribution to heating compared to effect of increasing CO2 concentration is negligible in the range of 1%, this is well known.
On the other hand, particulate matter emitted by oil and coal plants causes millions of deaths per year, right now. And CO2 emissions from oil, gas and natural gas are bringing us to the brink of an environmental catastrophe.