For conversion purposes when reading the Nuke articles. Sieverts radiation dose units used everywhere else, and Rems are used in the U.S.
milli is a one thousandth.
1 rem is 10 millisieverts.
It appears that the approved yearly permitted radiation dose for workers at the Fukushima plant has been jacked up to the level that the shuttle astronauts are permitted to take per mission.
Japan wouldn’t need to ban all the food from the farms near Fukushima. A lot of the radioactive contamination has short half life. The produce would become edible after some time in the can or freezer, even if initial levels are too high for immediate consumption, after washing. (When the glow starts to go, chow down.) Moving food and processing it will be a much bigger job than usual in some of these areas.
The radioactivity in the water found in Tokyo is below safety limits thus far.
In the AM of today, some smoke is rising from the spent fuel storage of reactor 3 at Fukushima Daiichi, and the workers have scooted out of there for a bit.
Wouldn’t you know it, the Fukushima Daiichi data is being amassed at Wikipedia. It’s a starting point for learning about this, not the final word, and the article even indicates this at the top. The wiki piece is pretty comprehensive and appears to be infinitely more useful than the garbage coming out of the media.
This timeline at Wikipedia is being kept current.