Taking A Moment To Relax

First the good news: The fire at the Fukushima Dai-ichi #4 reactor has been extinguished. The southerly winds bringing radioactive contaminants to the Tokyo area have slowed somewhat. Cooling on reactors #1 and #3 has stabilized. And cooling on reactor #2 continues. Second, the good news: Reactors

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What Is A Millisievert?

So, you’re sitting there watching the news and the reporter sagely looks at the camera and says, “The current radiation levels recorded at the #2 reactor was measured to be 100 millisieverts”. It sounds bad. The question is, how bad is it really? In the SI system,

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