On March 11 2011, turbines and reactors of Fukushima Daini Nuclear Power 
Station Units 1 to 4 (Boiling Water Reactors, rated output 1,100 Megawatts) 
that we had been constantly operating at rated thermal output were 
automatically shut down at 2:48 pm due to the Tohoku-Chihou-Taiheiyou-Oki 
Earthquake. 
                                        (previously announced on March 11)

At 7:15 am on March 15, the reactor of Unit 4 achieved cold shutdown. As a 
result, all reactors of Units 1 to 4 at Fukushima Daini Nuclear Power 
Station achieved cold shutdown.
                                        (previously announced on March 15)

As of 3:00 pm on October 25, the reactors of Units 1 to 4 are in cold 
shutdown (please refer to the appendix). We will continue to make our 
endeavors to further stabilize each plant of cold shutdown. 

<Updates are underlined> 
○ The renewal construction of a permanent building which will be  
   installed No.7 monitoring post 
   Among monitoring posts (No.1 - 7), which are installed at the boundary of 
   the plant site, we are constructing the renewal of the building which will 
   be installed No.7 monitoring post's measurement equipment from today to 
   Dec 20. 
   We will start the measurement in the permanent building be installed No.7 
   monitoring post,  although the old building was lost by the tsunami with 
   the Tohoku-Chihou-Taiheiyou-Oki Earthquake which occurred on March 11 
   2011,we are continuing the measurement in the temporary building from July. 
   In the period of working, there is a possibility that measurement results 
   will change to some extent due to the change of radiation circumstance 
   around the measurement equipment. 
   Working dates might be changed due to weather. 

Appendix: TEPCO Plant Status of Fukushima Daini Nuclear Power Station 
                                                         (PDF 16.7KB)