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

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

As of 3:00 pm on July 15, the Units 1 to 4 remain in a cold shutdown 
(please refer to the appendix). We will make our best efforts to stabilize 
each plant.

<New items are underlined>

○ At 3:09 pm on July 15, the emergency diesel generator (B) of Unit 1 is 
   restored and in a standby state. As a result, the emergency power source 
   of Unit1 is secured from emergency diesel generator (B) of Unit 1 and 
   emergency diesel generator (B) of Unit 2, 3. 
 
○ Of the monitoring posts (7 in total) installed in the site boundary, we 
   are planning to clean the inside of the covers that veil the measuring 
   devices and the feet of the posts from July 11th to 15th in order to 
   improve sensitivity for detection
   This might influence on measuring the data of the monitoring posts.

(Track Record of Cleaning Monitoring Posts)
○ No. 1: July 11th From 4:05 pm to 5:15 pm
○ No. 2: July 12th From 3:05 pm to 4:05 pm
○ No. 3: July 13th From 4:05 pm to 5:00 pm
○ No. 4: July 14th From 3:05 pm to 3:55 pm 

Appendix: TEPCO Plant Status of Fukushima Daini Nuclear Power Station 
                                                              (PDF 16.9KB)