Because they lost power to the water cooling system, they needed to vent the pressure that's building up inside.My suspicion is that as the temperature inside the reactor was rising, some of the metal cans that surround the fuel may have burst and at high temperature, that fuel cladding can react with water to produce zirconium oxide and hydrogen.That hydrogen then will be part of the gases that need to be vented. That hydrogen then mixes with the surrounding air. Hydrogen and oxygen can then recombine explosively. So it seems while the explosion wasn't directly connected with the nuclear processes, it was indirectly connected, because the hydrogen was only present because of what was going on in the reactor core.
quote: Also expecting the world to be rational is futile. Look at how much money is being spend on countering terrorism - if that money was instead spend fighting pollution and improving traffic safety the results would be much better.
quote: Heck, the money could be spend building schools, providing the most basic health care and thus making the whole world a better place (and likely make many wannabe terrorists into happy productive people).
quote: There will always be extremists and those who are angry at the world no matter what country they are in, but the idea is to minimize the number of ant hills we step on along the way.