At morgsatlarge [2] there is an excellent and detailed account of the dangers posed by the nuclear reactor meltdowns following Japan's earthquake. In short, a heck of a lot better designed than Chernobyl and coping quite well with a disaster five times bigger than its design parameters. And the press have almost entirely got it wrong. Read the whole story at the above link.
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Links:
[1] https://www.plegorg.snowfireangels.net/user/5
[2] http://morgsatlarge.wordpress.com/2011/03/13/why-i-am-not-worried-about-japans-nuclear-reactors/
[3] http://www.addtoany.com/share_save?linkurl=https%3A%2F%2Fwww.plegorg.snowfireangels.net%2Farticles%2Fjapans-nuclear-reactor-meltdown&linkname=Japan%27s%20Nuclear%20Reactor%20Meltdown
[4] https://www.plegorg.snowfireangels.net/category/topics/nuclear-energy
[5] https://www.plegorg.snowfireangels.net/category/topics/nuclear-power
[6] https://www.plegorg.snowfireangels.net/category/locality/japan