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. 46.4°C at 5:00 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. 33.6°C at 5:00 am on December 31.
   Point E: (Maximum) approx. 40.0°C at 5:00 pm on December 29 → 
            approx. 37.2°C at 5:00 am on December 31.
  We will continuously conduct the survey for the cause of temperature 
  increase and surveillance of the plant.

* Since inlet pressure of the primary circulation pump in the alternative 
  cooling system of the spent fuel pool of Unit 3 frequently tended to 
  decrease due to the effect of clogging of the inlet strainer of the pump, 
  the pump was stopped at each time in order to flush the strainer. However, 
  since this tendency is supposed to continue and the temperature of the 
  spent fuel pool is sufficiently low, which is approx. 13.0°C, and there 
  is enough margin from the operational limit value (upper limit) by the 
  safety regulation, which is 65.0°C, we determined to stop the pump by 
  January 4 of 2012 and temporary stop the cooling of spent fuel pool, 
  considering the exposure dose during the flushing.
  At 4:54 pm on December 30 of 2011, the pump was stopped. (Temperature of 
  the spent fuel pool was approx. 13.3°C at the time of shutdown.) It is 
  valuated that the temperature rise of the spent fuel pool due to the 
  shutdown of the pump is approx. 5 to 6 degrees for a day. And it is 
  planned that this pump operates for one time in a day to check the 
  temperature of the spent fuel pool during this temporary operation, since 
  December 31, 2011.

* At 2:37 pm on December 30, we started the transfer of the accumulated 
  water from the basement of turbine building of Unit 3 to the Centralized 
  Radiation Waste Treatment Facility (the Miscellaneous Solid Waste Volume 
  Reduction Treatment Building [High Temperature Incinerator Building] and 
  the Process Main Building). At 9:58 am on December 31, we stopped the 
  transfer.

· 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 10:00 am, December 31, 2011) (PDF 330KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)

* Revised past progress