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)

* As of 5:00 pm on November 26, the indicator of the gas temperature of
  Suppression Chamber of Unit 2 read 52.7°C, but at 11:00 pm on the day we
  confirmed that it read "Overscaled" (digital recorder). Then, as of 5:00
  am on November 27, it read 102.6°C. Though the readings were not stable,
  as there were no significant changes or variations in the temperatures
  of the same types of 2 thermometers and the pool water in Suppression
  Chamber, we have been investigating the causes for this event including
  the possibility of malfunction of the measuring instruments.

* The indicator for the inside of the Primary Containment Vessel (Drywell)
  of Unit 2 (base line temperature of the air conditioning unit, local
  cooling equipment) read 78.2°C as of 5:00 am on November 27 but at 6:50
  am on the day it was confirmed that it read approximately 84°C,
  increasing in a staircase pattern. On the other hand, it was also
  confirmed that the temperature changes of the bottom of the Reactor
  Pressure Vessel and the water in the pool of the Suppression Chamber
  were smaller than that of the inside of the Primary Containment Vessel
  (Drywell) and that there was no significant change in the temperature.
  Now we have been decreasing the flow rate of water injection as shown in
  the below and therefore it is expected that the temperature inside the
  Primary Containment Vessel will rise, but, as the line of which
  temperature rose in a staircase pattern was only one line of the five
  lines and the rest of the lines did not show the same changes, we have
  been investigating the causes for this event, including the possibility
  of malfunction of the measuring instruments. We will continue to monitor
  the temperatures.
  - At 7:11 pm on November 24, we adjusted the flow rate of water
    injection from Core Spray System from approx. 7.2 m3/h to approx.
    5.6m3/h (for feed water system, the flow rate is kept at 2.9 m3/h).
  - On November 26 (from 10:18 am to 11:02 am), we adjusted the flow rate
    from Core Spray System from approx. 5.5 m3/h to approx. 4.5m3/h (for
    feed water system, the flow rate is kept at 3.0 m3/h).

* At 2:54 pm on November 25, we started transferring accumulated water
  from Unit 1 T/B basement to Unit 2 T/B basement. At 9:38 am on November
  27, we stopped transferring it.

· 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, November 27, 2011) (PDF 354KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)

* Revised past progress