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)

* Since December 22, the atmospheric temperatures at point C of Unit 1 
  Primary Containment Vessel (PCV) monitored by the Containment Atmospheric 
  Monitoring System had risen (the atmospheric temperature of the PCV on 
  December 22 was approx. 38°C, at 7 pm on December 27 was approx. 49°C).  
  The other temperatures had not risen, so we conducted a survey checking 
  the reliability of the meters from 9 am to 10 am on December 28, and we 
  confirmed that there are no problems.  From 11:00am to 12:15pm on the 
  same day, we adjusted the volume of Nitrogen injection, from approx. 8 
  Nm3/h to approx.18 Nm3/h, and emission of the gas management system, from 
  approx. 23 Nm3/h to approx.30 Nm3/h, in order to identify the cause by 
  monitoring the system with the same injection and emission volume as 
  before December 22. The temperature went up to approx. 54.6°C at 6 pm on 
  December 28 and fell to approx. 45.9°C at 11 am on December 31. 
  Temperatures at other two points also indicated slight increases but are 
  currently in the stable status.
   Point D: (Maximum) approx. 35.8°C at 5:00 pm on December 29 → 
            approx. 33.4°C at 11:00 am on December 31. 
   Point E: (Maximum) approx. 40.0°C at 5:00 pm on December 29 → 
            approx. 36.9°C at 11:00 am on December 31. 
  We will continuously conduct the survey for the cause of temperature 
  increase and surveillance of the plant.

· 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 31, 2011) (PDF 257KB) 
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)

* Revised past progress