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)

*On December 2, as we finished the construction work to reinforce on-site
 power, we stopped the evaporative concentration apparatus at 6:00pm on
 December 2, the water desalinations (reverse osmosis membrane type) at
 8:04 am on December 3, and the cesium adsorption apparatus at 8:30 am on
 December 3, respectively, in order to start receiving power from the
 power source. As for the second cesium adsorption apparatus, it is
 operated without interruption and the treatment of accumulated water is
 in progress. There is no adverse effect to water injection into the
 reactor, as purified water in the buffer tank is utilized. We restarted
 the water desalinations (reverse osmosis membrane type) at 1:30 pm on
 December 3 and the cesium adsorption apparatus at 2:22 pm, and the
 evaporative concentration apparatus at 2:34 pm, after power receiving
 operation.

*From around at 5:48 pm on December 3, data of monitoring post No.8,
 monitoring dosage rate at the power station, found disappeared. As the
 reason was not found and the post was not be able to recovered, an
 alternative monitoring by monitoring post No.7 and a dose rate meter
 having additionally monitored around monitoring post No, 8 (which was set
 to monitor corresponding to nitrogen injection to RPV) was conducted, and
 the most recent data was not changed from that of the day before (The
 monitoring post No.7: 92μSv /hour, around the monitoring post
 No. 8: 42μSv /hour (as of 8:00 pm) ). The monitoring post No.8 will be
 maintained hereafter.

*For works to stop of the leakage detected between cable duct for starting
 transformer and control building of Unit 3, which was confirmed on August
 4 (announced on August 8, 2011), we conducted switching power of power
 panel from at 7:07 pm to 9:01 pm on December 3, to transfer and
 disconnect cables of power panel of backup transformer, receiving power
 from Okuma line 2L. Due to the switching work, lightings of rest houses
 in the site, regional air-exhaust ventilators, dust monitors located at
 main entrance, Main Anti-Earthquake Building, and rest houses of Unit 5/6
 service building were stopped. After finishing switching works, the
 abovementioned systems recovered.

· 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, December 4, 2011) (PDF 197KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)

* Revised past progress