20km-30km are "evacuation in place" - stay inside, close windows, don't run your a/c and heater, don't bring laundry inside, wash clothes you were wearing out.
No they are still having issues with Reactor 4 at plant two according to a recent IAEA press release. I as well thought everything was under control there?
“Japanese authorities yesterday reported to the IAEA at 21:05 CET that the reactors Units 1, 2 and 3 of the Fukushima Daini nuclear power plant are in cold shutdown status. This means that the pressure of the water coolant is at around atmospheric level and the temperature is below 100 degrees Celsius. Under these conditions, the reactors are considered to be safely under control.
Japanese authorities have also informed the IAEA that teams of experts from Tokyo Electric Power Company (TEPCO), the plant´s operator, are working to restore cooling in the reactor Unit 4 and bring it to cold shutdown.”
http://www.iaea.org/newscenter/news/tsunamiupdate01.html