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 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 Unit 1 to 3. In order to construct the nitrogen 
 injection line direct to the reactor branched by the nitrogen injection 
 line into the primary containment vessel of Unit 3, at 11:33 am on 
 November 30, we temporarily stopped Nitrogen injection into the primary 
 containment vessel. Then, we restarted Nitrogen injection into the 
 primary containment vessel. At 1:20 pm on the same day, we confirmed the 
 nitrogen injection amount (28m3/h) into the primary containment vessel 
 was stable. 
 In addition, In order to conduct the work on Unit 1 like Unit 3, at 11:40 
 am on November 30, we temporarily stopped nitrogen injection into the 
 primary containment vessel of Unit 1. Then, we restarted Nitrogen 
 injection into the primary containment vessel of Unit 1. At 12:23 pm on 
 the same day, we confirmed the nitrogen injection amount (28m3/h) into 
 the primary containment vessel was stable.

*At 1:45 pm on November 30, we started nitrogen injection to the Reactor 
 Pressure Vessel.  
 At 2:47 pm on the same day, as we confirmed nitrogen injection had not 
 increased, we temporally stopped the operation. The cause is under 
 investigation. We are continuing nitrogen injection into the primary 
 containment vessel of Unit 2.

*At 9:00 am on November 30, we started dust sampling above the reactor 
 building of Unit 3 with a large crane. At 12:30 pm on the same day, we 
 finished the sampling.

*At 10:00 am on November 30, we started dust sampling by a robot near the 
 equipment hatch of ground floor, reactor building unit 3. At 10:30 am on 
 the same day, we finished sampling.

*At 1:26 pm on November 30, we started injection of hydrazine into spent 
 fuel pool of unit 2 by using 
 circulating cooling system. 

·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 30, 2011) (PDF 184KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)

* Revised past progress