http://www.tepco.co.jp/en/press/corp-com/release/11071905-e.html
And the official Japanese version:
http://www.tepco.co.jp/cc/press/11071902-j.html
Did someone ask what the "Step 1" was? It was supposed to be "stable cooling of the reactors", and which TEPCO and the government (from PM Kan on down) claim to have been achieved by the full operation (at 70% operating rate) of the contaminated water treatment system and the injection of nitrogen gas into the Containment Vessels of Reactors 1, 2 and 3.
Particularly the latter looks like an effort to just tick off the box in the "roadmap", not necessarily out of real concern of recriticality. For this effort carbon workers were exposed to very high radiation levels inside the reactor buildings of Reactors 2 and 3, not to mention the bots who had to vacuum clean the floor or go measure the radiation.
Just wait for the government's declaration that now it's safe for the residents in 20-30 kilometer radius to go home to the highly contaminated soil that no one will decontaminate and high air radiation, now that the plant is "stable".
To make sure the residents have little choice but to go home, the Fukushima prefectural government is shutting down the evacuation shelters within Fukushima. Temporary housing arrangements in other prefectures for the evacuees from Fukushima are expiring, and are not likely to be renewed because of the cost.
Dr. Shunichi "100 millisieverts are safe" Yamashita is now installed as the vice president of Fukushima Medical University, and must be anxious to help Fukushima residents in any way he can. Fukushima Prefecture is so ready to receive all the residents back inside the prefecture, and the successful completion of the "step 1" is just the news they want to hear.