Just days after the the 11 March 2011 earthquake and tsunamis, several Fukushima Daiichi nuclear reactors went critical, melted down, and some even exploded. But to date (11 December 2011) no decontamination efforts have been carried out by the prefectural or national governments!
A couple of cities, and even neighborhood committees have attempted decontamination of their immediate surroundings, but nothing on the large scale that’s needed. This is because no one in higher authority thought such a nuclear disaster would ever happen.
Testimony by many Japanese officials (and Tokyo Electric Power Company officials) say representatives from General Electric (and other U.S. nuclear power companies), and the U.S. government, had claimed the U.S. designed disaster reactors were the safest in the world. Japanese officials thought there was no justification for such preparations as the U.S. designed nuke plants were so safe.
As a result of the March nuclear disaster (which is still ongoing) officials in the national and prefectural governments have been scrambling to learn everything they can about how to deal with the situation (that included a trip to Chernobyl, albeit very late in the game).
But learning everything they could in a short time wasn’t enough. The Japanese national government had to pass a law ordering the large scale decontamination!
The Japanese Environment Ministry says they will begin decontamination of roads and other infrastructure in late January 2012. They do not expect to be able to start decontaminating residences until March 2012! And that’s for areas contaminated with less than 20 millisieverts of radiation. Japanese officials admit they still don’t know how to deal with areas contaminated with more than 20 millisieverts of radiation!
The Environment Ministry says they are conducting new studies to see how best to handle decontamination in areas with more than 20 millisieverts of radiation, with a focus on protecting the workers.