You're going to have to show some proof for this claim, because you seem to have the risk assessment backwards.

> Tsunami

The tsunami in Japan killed over 15,000 people (with several thousand more missing, likely dead). Radiation from Fukushima Daiichi (or anywhere else) hasn't killed anybody yet, though a handful of unfortunate workers and others in the immediate vicinity may have cancer problems in the future. Hopefully those cases will be treatable, but we won't know for some time.

15,000+ dead seems to indicate some tsunamis are far more dangerous than nuclear power.

> coal dusts

You might want to look again at the contents of fly ash. It's radioactive, full of a long list of heavy metals, with trace amounts of nasty things like dioxins.

Why? The tsunami killed more people than the radiation is estimated to even with the most generous estimates of how many people will get sick from radiation. Hell, even the stress/evacuation caused by the worry of radiation is likely to kill more people than the radiation itself would have if they didn't take those steps.

http://www.nytimes.com/2015/09/22/science/when-radiation-isn...