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 8:25 am on 6 December, dust sampling at opening part (blow out panel) 
  of Reactor Building in Unit 2 was started. At 10:25 am, sampling was
  completed.

* At 11:04 am on November 6, facilities to remove radioactive materials 
  from the spent fuel pool in Unit 2 were started. After its continuous
  operation for a month, the concentration of radioactive materials is
  expected to go below the level of 102, the facilities finished its
  operation on December 5. Sampling analysis of water in the spent fuel
  pool thereafter confirmed that the concentration of radioactive material
  actually decreased to the level of 102 from the level of 105 before the
  removal operation.
  
* We plan to establish the system injecting water into the reactor in Unit 
  1 to 3 using the condensate storage tank of Unit 3. In preparation of 
  such establishment, the stored water in the tank was transferred to the 
  basement of turbine building of Unit 3 from 10:22 am on November 21 to 
  9:45 am on November 24. As the calibration of water level gauge is
  required if all the water is transferred, approx. 200 ton was left in
  the tank. During the measurement of salt concentration in the left water,
  it turned out that concentration was high. In order to secure the space
  for additional water injection to decrease such concentration, at 10:00
  am on December 6, the left water was transferred from the tank to the
  basement of the turbine building of Unit 3.
  
* At approx. 11:00 am on December 6, leakage at a pin hole on the transfer
  hose from a buffer tank to a desalination facility (leakage was a drop
  per second). It was confirmed that leakage stopped after the temporary
  repair with the water proof tape. The impact on the environment is
  minimal as the leaked water is desalinated after the treatment by the
  radioactive material removal facility and the leaked amount is little
  
* From November 28, for the purpose of the cleaning by sucking up sands 
  etc. accumulated at the bottom of the inlet canal pump room in order to 
  avoid the performance deterioration of pumps, we stopped the pump (D) of 
  the residual heat removal system and suspended cooling the reactor, We 
  also stopped the pump (C) of the cooling water system and suspended 
  cooling the spent fuel pool. When each pump was stopped, the 
  temperatures of the water in the reactor and the spent fuel pool were 
  25.7°C and 20.4°C respectively. The planned suspension of cooling is 
  between 7:00 am to 5:00 pm everyday, and the temperature increases of 
  the water in the reactor and the spent fuel pool due to the suspension 
  are expected to be approx. 17°C and approx. 4°C per day respectively (we 
  plan to do the cleaning work for approx. 1 week).
  On December 6, after the completion of such cleaning work, at 2:06 pm,
  we reactivated the pump (C) of the cooling water system in Unit 5 in
  order to restart the cooling of the spent fuel pool.(The temperature of
  the spent fuel pool was 23.3°C). At 2:24 pm, we reactivated the pump (D)
  of the residual heat removal system in Unit 5 in order to restart the
  cooling of the spent fuel pool.(The temperature of the spent fuel pool
  was 35°C).

* At 0:20 pm on December 6, it was confirmed that the measurement data for
  0:00 pm in the monitoring post set at the main gate was missing. The
  data for 1:00 pm, 1:30 pm, and 2:00 pm were manually measured at the
  location and the measured data was in the same level as the data before
  0:00 pm. Thereafter, we have removed the water accumulated in the cable
  connector portion of the monitoring post and restarted the measurement
  by the monitoring post at 2:30 pm.

* At 5:48 pm on December 3, the display malfunction of the No.8 monitoring 
  post measuring the radiation dose in the site was observed. As we could 
  not identify the cause and thus not make repair, alternative measurement 
  was conducted by the dosimeter located near the No.7 and 8 monitoring 
  post, which was installed to reinforce the surveillance along with the 
  nitrogen injection operation into the Reactor Pressure Vessel. Measured 
  data indicates no change from the previous day.
  On December 6, the display function of No. 8 monitoring post was
  retrieved when its board was reinserted. Thereafter, we have restarted
  the measurement with No. 8 monitoring post as no sign of reoccurrence
  was confirmed.

* At 10:00 am on December 5, the transfer of the accumulated water in the 
  basement of Unit 6 turbine building to the temporary tank was started. 
  At 4:00 pm on December 6, the transfer was stopped.

· Fukushima Daini Nuclear Power Station:
  Units 1 to 4: shutdown due to the earthquake

* At 2:44 pm on December 6, along with the switching work from Unit 2 the
  residual heat removal system (A) to (B), the (A) system was stopped. At
  3:11 pm. (B) system was activated.

· 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 4:00 pm, December 6, 2011) (PDF 200KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)

* Revised past progress