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 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, 2011, 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 ㎥/h to approx.18 ㎥/h, and emission of the 
   gas management system, from approx. 23 ㎥/h to approx.30 ㎥/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. 41.4°C at 
   11:00 am on January 5, 2012. 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, 2011 → 
                            approx. 31.3°C at 11:00 am on January 5, 2012. 
   Point E: (Maximum) approx. 40.0°C at 5:00 pm on December 29, 2011 → 
                            approx. 34.3°C at 11:00 am on January 5, 2012. 
   We will continuously conduct the survey for the cause of temperature 
   increase and surveillance of the plant.
 * At 10:12 am on January 5 2012, there was a fluctuation in the injection 
   amount to the reactor of Unit 1. Therefore we adjusted the injection 
   through the reactor feed water system from 4.8㎥/h to 4.5㎥/h and 
   injection through the reactor spray system from 1.8㎥/h to 2.0㎥/h. 
 * Since the suction of the primary circulating pump of the spent fuel 
   pool substitute cooling system of Unit 3 was continuously low, at 11:46 
   am on January 5 2012 we stopped this system to replace the strainer at 
   the entrance of this system. Due to this the cooling of the spent fuel 
   pool has been temporarily suspended and is scheduled to remain 
   suspended until January 7. During this period the temperature of the 
   pool is expected to rise by approx. 0.25°C/h (Temperature at the time 
   of suspension: 23.7°C) 

· Fukushima Daini Nuclear Power Station: 
  (Units 1 to 4: shutdown due to the earthquake)
 * At 11:24 am on January 5 2012, according to switching works from 
   Residual Heat Removal System (A) of Unit 4 to (B), we suspended 
   Residual Heat Removal System (A) and activated Residual Heat Removal 
   System (B) at 11:37 am on the same day. 

· 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, January 5, 2012) (PDF 459KB) 
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB) 
 
* Revised past progress