Comment Re: Out of control demand for power (Score 2) 106
It's worth noting that nuclear reactors don't really explode in the way people think of. What they can do is turn into radioactive lava, melt through the floor, and release the highly carcinogenic dust from their system into the environment. They're generally big water heaters without pressure release valves (because the water has the carcinogenic dust in it), so they can burst like any water heater, and they contain zirconium, which reacts with steam at high temperatures to release hydrogen gas, which can make fireballs, but the accident risk is much less about a shock wave destroying the site than airborne radioactive particles getting out. And, even if the reactor design is incapable of producing enough heat to damage itself without first shutting down, you still have to worry about whether the site is safe enough from external damage. The traditional thick concrete walls are as much about keeping runaway trucks out as keeping steam explosions in.