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, 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, 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 since the previous press release 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)

*At 1:57 pm on December 21, transfer of accumulated water was started from 
 Unit 2 turbine building to the Centralized Radiation Waste Treatment 
 Facility (Miscellaneous Solid Waste Volume Reduction Treatment Building 
 [High temperature incinerator building] and Process Main Building). At 
 9:42 am on December 23, the transfer was suspended.

*Accumulated water in the trench located between the process main building 
 of Centralized Radiation Waste Treatment Facility and Miscellaneous Solid 
 Waste Volume Reduction Treatment Building (High Temperature Incinerator 
 Building) found on December 18 was started to transfer to Miscellaneous 
 Solid Waste Volume Reduction Treatment Building (High Temperature 
 Incinerator Building) from 10:19 am on December 23.

*On 10:30 am on December 23, the changes of injection water flow to 
 Reactors of Unit 1 to 3 were found so that following adjustments were 
 implemented.
  Unit 1: Water injection from Core Spray System was adjusted from approx. 
          1.9 m3/h to 2.0 m3/h (water injection from feed water system was 
          remained unchanged as approx. 4.5 m3/h). 
  Unit 2: Water injection from feed water system was adjusted from approx. 
          2.5 m3/h to 3.0 m3/h (water injection from Core Spray system was 
          remained unchanged as approx. 6.0 m3/h). 
  Unit 3: Water injection from Core Spray System was adjusted from approx. 
          6.5 m3/h to 6.0 m3/h (water injection from feed water system was 
          remained unchanged as approx. 3.0 m3/h). 

*At 3:03 pm on December 20, we stopped the alternative cooling system of 
 the Spent Fuel Pool of Unit 2 due to inspections in the flow rate 
 detector of the system. After that, deposits were piled up inside the 
 inlet and outlet pipes of flow meter when we cut those pipes for 
 inspection. Therefore, we cleaned up the pipes to remove the deposits. 
 After the completion of the inspection of the flow meter, at 2:18 pm on 
 December 23, we started the water injection system and confirmed that 
 there was no fluctuations in water flow difference (water temperature of 
 spent fuel pool at the time of system start: 26.6 °C).

·Fukushima Daini Nuclear Power Station:
  Units 1 to 4: shutdown due to the earthquake

·Kashiwazaki Kariwa Nuclear Power Station: Units 5, 6: under normal 
 operation
  (Units 1 to 4 and 7: outage due to regular inspections)

[Thermal Power Station]
·Power supply has returned to normal and facilities damaged by the 
 earthquake are now being handled in a timely manner.

[Hydro Power Station]
·Power supply has returned to normal and facilities damaged by the 
 earthquake are now being handled in a timely manner.

[Impacts on Transmission Facilities]
·Power supply has returned to normal and facilities damaged by the 
 earthquake are now being handled in a timely manner.

[Impacts on Power Supply and Demand Balance]
This winter, there will be some minus factors such as the regular 
inspection of Unit 5 at Kashiwazaki-Kariwa Nuclear Power Station. On the 
other hand, there will be several plus factors such as the recovery of the 
common thermal power stations which suffered the earthquake. As a result, 
we expect to secure 54.9 GW (at the end of December), 54.6 GW (at the end 
of January), 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 - 3.4 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, December 23, 2011) (PDF 247KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)

* Revised past progress