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. 
 
*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 
 
-As the component cooling sea water system pump (C) of Unit 6 has been 
 restored, we started test operation at 10:05 am on February 22. 
 Accordingly, the component cooling sea water system pump (A) stopped its 
 operation at 10:07 am on the same day. At 11:25 on the same day, we 
 confirmed that there was no problem in the operation of the component 
 cooling sea water system pump (C). As a result, two of the component 
 cooling sea water system pumps of Unit 6, (A) and (C) are in operation, 
 
-At 9:18 am on January 31, we started transporting the sub-drain water of 
 Unit 6 to the temporary conservation tank. From 9:53 am on February 23, 
 we started transfer to the temporary tank. At 1:00 pm on the same day, 
 we completed the transfer. We will properly transfer the water to the 
 temporary tank. 
 
-At 2:04 pm on February 23, we started to transfer accumulated water from 
 underground floor of turbine building of Unit 2 to the centralized 
 radiation waste treatment facility (process main building). 
 
-At 1:23 pm on February 23, we started to inject hydrazine into the spent 
 fuel pool of Unit 4 through the circulating cooling system, and stopped 
 it at 3:00 pm on the same day. 
 
-As installation works of the PCV gas control system of Unit 3 was 
 completed, we started a test operation at 11:38 am on February 23. We 
 confirmed that an exhaust flow amount was stable at 33m3/h at 2:10 pm and 
 started an adjustment operation. 
 
·Fukushima Daini Nuclear Power Station: 
  (Units 1 to 4: shutdown due to the earthquake) 
 
-At 2:17 pm on February 23, the residual heat recovery system was switched 
 from (B) to (A). The system (B) was stopped accordingly and the system 
 (A) was started at 2:37 pm on the same day. 
 
·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 3:00 pm on February 23, 2012) (PDF 665KB) 
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB) 
 
* Revised past progress