at least If an asteroid hits a gas or coal power, there would be no danger of radiation, so
the real question is, is this all worth the risk?
Actually, the asteroid impact itself would be quite a large source of radiation, but that's missing my point.
Is it worth the risk? Yes, no civilians have ever been killed or injured from nuclear power. Workers don't die or get cancer from radiation.
The only viable alternative to nuclear power is Coal and Natural Gas. I cannot imagine how many people die a year in Coal Mines alone, let alone the effects of the harmful material Coal plants put into the air.
Wind and water and solar power are great, but they just cannot match the demand the grid needs.
Nuclear power is a safe and clean power. However, a 8.9 earthquake, asteroids, terrorists, and any other sort of natural or unnatural disaster cannot always be prevented. When a nuclear power plant happens to be in their path, bad things happen. But even then, it is still the safest most viable source of energy we have.