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 17, Units 1 to 4 remain in a cold shutdown (please 
refer to the appendix). 

<New items are underlined>
○ At 11:40 am today (on June 17), the Clean Up Water System* of Unit 2 has 
   been restored. 
   Currently Residual Heat Removal System (B) is in operation for cooling 
   and heat removal of Reactor. As Clean Up Water System restored today is 
   expected to work as reactor cooling function, it is thought that the 
   reliability of Unit 2 cold shutdown status would be improved. We will 
   make every effort to restore facilities to further enhance the 
   reliability of cold shutdown status 
 
 *Clean Up Water System (CUW): system to remove impurities in reactor water 
 and maintain the water quality; The system is also used to control reactor 
 water level by discharging redundant water from the reactor during a 
 regular inspection or reactor shutdown. 
 The restoration of CUW of Unit 2 followed those of Unit 4 (on July 4), 
 Unit 3 (on June 6) and Unit 1 (on July 16). CUWs of all units have been 
 restored. 
 
We will make our best efforts to stabilize each plant 

Appendix: TEPCO Plant Status of Fukushima Daini Nuclear Power Station 
                                                              (PDF 16.8KB)