Links and News CommentaryTuesday, 15 March 2011 09:41 am
I’m sadden by what I read and what I see on the TV screen. As the number of the dead rises exponentially – 1000 to 2000 to 10000 – as tragic and devastating as it is, one can’t help by feel numbed by it all. That’s when I started seeking out the relative comfort of scientific facts. If you have young children traumatised by it all, teaching them a bit of science can help. Here’s some good articles.
So, there’s no rhyme or reason to these things but there’s a how. The New York Times has a great graphic explaining how the tectonic plates underneath Japan rammed into each other, causing the earthquake and the subsequent tsunami.
How Shifting Plates Caused the Japan Earthquake – Interactive Feature – NYTimes.com.
The troubled nuclear reactors at Fukushima Daiichi survived the big earthquake but they got swamped by the tsunami. The reactors shut down as the quake happened, but the nuclear rods still generated heat and still needed cooling, but the backup generators may have been damaged in the flood and the batteries ran out. That led to the water in the cooling tank boiling and turning into steam faster than it can be replaced.
That exposed the nuclear rods to air, generating gases in the tank which probably led to the explosions. They tried pumping in sea water but it’s a constant race against time before the water starts boiling and evaporating again.
Why doesn’t a nuclear generator power its own cooling system? Good question. This and more is explained in this article on MSNBC, and the comments within.
Cosmic Log – Clearing up nuclear questions.
The New York Times did something similar with a graphic and explains what would happen if the nuclear fuel rods melt down. Indications are that they will be contained but radioactive steam will be vented out for an extended period as they strive to control the heat build up.
The Crippled Japanese Nuclear Reactors – Interactive Feature – NYTimes.com.
And this last article does not have any science in it but it is a great collection of photos, which will surely put your petty problems into perspective.
Japan – Vast Devastation – The Big Picture – Boston.com.