Due to the Tohoku-Chihou-Taiheiyou-Oki Earthquake which occurred on March 
11, 2011, TEPCO's facilities including our nuclear power stations have 
been severely damaged. We deeply apologize for the anxiety and 
inconvenience caused. 
With regard to the accident at Fukushima Daiichi Nuclear Power Station, 
on April 17, 2011, we have compiled the roadmap towards restoration from 
the accident and on July 19 we accomplished the Step1 target "Radiation 
dose is in steady decline". Then on December 16 we confirmed the 
accomplishment of the Step 2 target "Release of radioactive materials is 
under control and radiation doses are being significantly held down". 
In addition, on December 21, 2011, we have compiled the "Mid-to-long-Term 
Roadmap toward the Decommissioning of Fukushima Daiichi Nuclear Power 
Units 1-4, TEPCO". 
In addition to the maintenance of the plant's stable condition, we will 
implement Mid-to-Long Term countermeasures towards the decommissioning of 
Fukushima Daiichi Nuclear Power Units 1-4 to enable evacuees to return to 
their homes as soon as possible and reduce the anxiety of the people in 
Fukushima and the whole nation as soon as possible. 
 
Below is the status of TEPCO's major facilities. 
 
* The updates are underlined 
 
 [Nuclear Power Station] 
 
· Fukushima Daiichi Nuclear Power Station: Unit 1 to 3: shut down due to 
  the earthquake: 
   (Units 4 to 6: outage due to regular inspections before the earthquake) 
 
 - At 8:35 am on February 20, since the amount of disposed water in the 
   Second Cesium Adsorption instruments decreases gradually, we suspended 
   the system for cleaning. At 11:07 am on February 20, the system 
   restarted and at 11:11 am, the amount of water reached ordinary volume 
   (approx. 36.2 m3/h). 
 
 - According to the investigation on trenches on January 19, 2012, high 
   density contaminated water inside was found inside circulating water 
   pump discharge valve pit of Unit 2 water pump room Therefore, at 10:11 
   am on February 20, 2012, we started to transfer the accumulated water 
   from the pit to the basement of Unit 2 Turbine Building. 
 
 - At around 7:05 am on February 18, within the Unit 2 SFP alternative 
   cooling system, an alarm sounded showing that the water flow 
   difference was large at the gateway of primary system pump and the 
   system automatically shutdown. After that, we confirmed there was no 
   abnormalities such as leakage at the location where the primary system 
   shutdown. However, as temperature decreased in the outer temperature, 
   the secondary system cooing water temperature also decreased and it 
   may freeze, with a view toward facility protection, we resumed it so 
   as to prevent the primary and secondary system from freezing. Upon 
   resumption, we made sure there were no leakage or parameter 
   abnormalities, and by releasing the alarm at 11:54 pm on February 18, 
   we activated the system. Since we do not see any abnormalities, 
   operation of the system is still continuing. Afterwards, water flow 
   difference turned to be normal figure and we considered the cause is 
   stuck of dust in the pipe of flow sensor. From 1:46 pm to 2:38 pm on 
   February 20, we conducted flashing of pipes of flow sensor. During 
   flushing, the system was not suspended and there are no abnormalities 
   on operation after flushing. 
 
· Fukushima Daini Nuclear Power Station: 
   (Units 1 to 4: shutdown due to the earthquake) 
 
· Kashiwazaki Kariwa Nuclear Power Station: Units 6: under normal 
  operation 
   (Units 1 to 5 and 7: outage due to regular inspections) 
 
 [Thermal Power Station] 
· Power supply has returned to normal and the facilities damaged by the 
  earthquake are now being handled in a timely manner. 
 
 [Hydro Power Station] 
· Power supply has returned to normal and the facilities damaged by the 
  earthquake are now being handled in a timely manner. 
 
 [Impacts on Transmission Facilities] 
· Power supply has returned to normal and the facilities damaged by the 
  earthquake are now being handled in a timely manner. 
 
 [Impacts on Power Supply and Demand Balance] 
This winter, there are some minus factors such as the regular inspection 
of Unit 5 at Kashiwazaki-Kariwa Nuclear Power Station. On the other hand, 
there are several plus factors such as the recovery of the common thermal 
power stations which suffered the earthquake. As a result, we expect to 
secure 53.7 GW (at the end of February) supply power. 
Compared to the maximum demand in the last winter, which is 51.5 GW, we 
will have 2.2 GW generation reserve margin. 
 
We expect to maintain stable power supply this winter. However, as there 
remains possibilities of unplanned shutdowns at our power stations and 
growth in the demand according to the rapid change in the temperature, we 
would like to ask your reasonable effort to save electricity. 
 
We will continue to make our efforts to maintain stable operation and 
maintenance of the power facilities in order to "prevent in principle" 
the planned blackouts and secure power supply. 
 

 
Appendix: Past Progress (As of 10:00 am on February 20, 2012) (PDF 658KB) 
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB) 
 
* Revised past progress