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 from 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)

- At 9:31 am on November 24, we started transferring accumulated water 
  from On-site Bunker Building to Centralized Radiation Waste Treatment 
  Facility. 
  At 5:05 pm on the same day, we ceased the transfer.

* Regarding the cleanup work we have conducted since November 15 for the
  bottom of intake channel pump room of Unit 6, we finished all the work 
  on November 23. Following this, at 5 o'clock on the same day, in an 
  operation to resume the auxiliary cooling seawater system pump (A) of 
  Unit 6, it shutdown automatically right after the resumption. On
  November 24, as a result of checkups of the pump except for the power
  panel switchgear that we are unable to check without overhauling, since
  we identified no abnormality, the pump resumed at 4:19 pm after a
  workout to resume by replacing the power panel switchgear. After that at
  4:35 pm, as there was no abnormality we resumed cooling down the Spent
  Fuel Pool water by using the pump (SFP water temperature: 23.5 °C at the
  time of resumption). Since 10:23 am on November 24, as for the water
  residual heat removal system (A) pump that has been shutdown to cool
  down the water of nuclear reactor, we resumed operation by changing our
  operating method at 4:45 pm, (nuclear reactor water temperature: 33.4 °C
  at the time of resumption).

* At 1:31 pm on November 24, we started injection of hydrazine to spent 
  fuel pool of Unit 4 through the circulating cooling system. At 3:05 pm
  on the same day, we finished the injection.

* On October 28, after regular operation of the gas control system for PCV,
  Unit 2, since a relatively high density hydrogen was detected on October
  29, we are intending to control the hydrogen density below the
  inflammable limit (4%) even if there is no steam, by directly including
  nitrogen into the RPV for Units 1 to 3.
  Until we have included nitrogen into RPV, in order to lower the hydrogen
  density of RPV by increasing the temperature and the steam ratio thereby,
  on November 24, we lowered the amount of water injection into the
  reactor of Units 1 to 3.
- Unit 1: At 7:03 pm, the injection amount by the feed water system
          decreased from 5.5 ㎥/h to 5.0 ㎥/h.
- Unit 2: At 7:11 pm, the water injection amount by the reactor core
          system decreased from 7.2 ㎥/h to 5.6 ㎥/h. (the injection
          of feed water system is continuing at 2.9 ㎥/h)
- Unit 3: At 7:19 pm, the water injection amount by the reactor core
          system decreased from 8.5 ㎥/h to 6.7 ㎥/h. (the injection
          of feed water system is continuing at 2.3 ㎥/h).
          At 7:09 pm, as the amount of nitrogen included was smaller
          than that of Units 1 and 2, the amount increased from 14 ㎥/h
          to 28.5 ㎥/h.

· 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 9:00 am, November 25, 2011) (PDF 336KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)

* Revised past progress