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".
By bringing the reactors and spent fuel pools to a stable cooling 
condition and mitigating the release of radioactive materials, we will 
make every effort to enable evacuees to return to their homes and for all 
citizens to be able to secure a sound life.

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 2:22 pm on December 15, we started transferring accumulated water
  from the basement of Unit 3 turbine building to Centralized Radiation 
  Waste Treatment Facility (Process Main Building). At 10:04 am on 
  December 17, we stopped it.

 *At 10:12 on December 17, we started transferring accumulated water from 
  the basement of Unit 2 turbine building to Centralized Radiation Waste 
  Treatment Facility (Miscellaneous Solid Waste Volume Reduction Treatment 
  Building [High Temperature Incinerator Building] and Process Main 
  Building). At 12:24 pm on the same day, we stopped the transfer since 
  the water level at Unit 2 turbine building did not change. Then we 
  confirmed at the site that the switching valve of the transfer line was 
  closed and that there was no leakage from the line. Then we opened the 
  valve and restarted the transfer at 1:22 pm on the same day.

 *At 10:23 on December 17, in the spent fuel pool alternative cooling 
  system, an alarm for "Air fin cooler panel malfunction" was triggered. 
  After the investigation at the site, it was confirmed that the secondary 
  system pressure decreased and the circulating pump (A) was shutdown 
  automatically. After the detailed investigation, it was confirmed that 
  the water leaked through the drainage line in the safety valve installed 
  in the upside of the pump (A). As the position of the handle of the 
  valve was off the usual position, we fixed it and at around 11:00 the 
  leaking stopped. After that, we increased the system pressure. 
  Confirming that no water leaked through the system, at 13:39, we 
  restarted the circulating pump (A) and cooling the spent fuel pool. The 
  leaked water from the drainage line is for the fire extinction purpose 
  (filtered water) and does not contain radioactive materials. The 
  temperature of the spent fuel at the cold shutdown and restart is 13°C 
  and no there is no temperature rising.

·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 17, 2011) (PDF 230KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)

* Revised past progress