At Chernobyl, the nuke reacto'rs controls ran on electricity FROM THE
GRID. That boggles my mind, that a nuke plant used to generate huge
amounts of electricity ran on electricity off the grid. The backup
generators took over 1 minute after grid failure to generate power,
which was too long. So they were doing an experiment to see if the
turbines had enough angular momentum after shutdown to produce enough
power to run the controls to bridge the one-minute gap. They botched
the experiment, the rest is history.
Hurricane Katrina caused a a surge of water in Lake Pontchetrain that
pushed the retaining walls some 30 ft backwards, like pushing a throw
rug on a slick floor. Of course they failed.
Mother Nature bats last, every game.
Here's a few good reads:
(Brutal descriptions of the effects of radiation)
http://en.wikipedia.org/wiki/Louis_Slotin (They did experiments on
"critical mass" using a lump of plutonium, a hand-held lid and a
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