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 then we updated the progress status of roadmap considering 
the current situation, on July 19. Accomplishment of the Step1 target 
"Radiation dose is in steady decline" has been confirmed. On November 17, 
we updated the further progress. 
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.

*Underlined are updates since the previous press release.

[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)

* We are planning to establish the system injecting water into the reactor 
  in Unit 1 to 3 using the condensate storage tank of Unit 3 as part of 
  reliability improvement of reactor water injection. During the measurement 
  of salt concentration in the left out water, it turned out that 
  concentration was high. To lower the salt concentration, we decided to 
  reduce the left out water and feed water. Before feeding water, from 10:00 
  am on December 6 to 8:54 am on December 7 we transferred the left out 
  water from the tank to the basement of the turbine building of Unit 3. At 
  9:19 am on the same day we started feeding water to the tank. Then we 
  discovered that there was a leak of water (approx. 5l) from the connecting 
  part of the hose and the tank. At 9:52 am we stopped water transfer and 
  confirmed that the leak stopped. After that, we finished changing the hose. 
  From 9:05 am on December 9, we started feeding water. At 9:25 on the same 
  day, we finished checking the water feeding line for water leakage.

* In order to change the power board for the common spent fuel pool facility, 
  at 9:28 am on December 9, we stopped cooling the common spent fuel pool 
  (the water temperature of the common spent fuel pool at that time: approx 
  18.8 Degree Celsius). On the same day, with completion of change work of 
  the power board, at 11:58 am, we resumed cooling (the water temperature of 
  the common spent fuel pool at that time: approx 19.1 Degree Celsius). 

* On December 9, as we observed reduction of water injection rate to 
  Reactors of Units 1 to 3, at 10:13 am, we adjusted the water injection 
  volume to Reactors of Units 1 to 3.
  Unit 1: adjusted the water injection rate from the feed water system from 
  approx 4.2m3/h to approx 4.5m3/h.
  Unit 2: adjusted the water injection rate from the core spray facility 
  from approx 4.2m3/h to approx 4.5m3/h (from feed water system remains at 
  approx 3.0m3/h).
  Unit 3: adjusted the water injection rate from the feed water system from 
  approx 2.0m3/h to approx 2.2m3/h, from the core spray facility from approx 
  6.2m3/h to approx 6.1m3/h

* As we observed reduction of flow rate at the residual heat removal 
  seawater system pump (C) of Unit 6, At 10:32 am on December 9, we stopped 
  cooling the Reactor by the residual heat removal system (A) and stopped 
  the residual heat removal seawater system pump (C). After that, we 
  restarted the residual heat removal seawater system pump (C) and confirmed 
  that the performance of that pump returned to almost normal level. At 
  11:18 am on the same day, we resumed cooling the Reactor by the residual 
  heat removal system (A). With this stop, Reactor water temperature 
  temporarily increased from 26.6 Degree Celsius to 27.5 Degree Celsius.

·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 9, 2011) (PDF 384KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)

* Revised past progress