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 9:24 am on November 29, we started sampling of dusts at the upper
    part of reactor building of unit 3 using a large crane vehicle. At
    1:00 pm on the same date, we finished the sampling.

  * 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 1, at 9:55 am on November 29, we temporarily stopped Nitrogen
    injection into the primary containment vessel. Then, we restarted
    Nitrogen injection into the primary containment vessel. At 11:30 am
    on the same date, 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 2 like Unit 1, at
    1:47 pm on November 29, we temporarily stopped nitrogen injection
    into the primary containment vessel of Unit 2. Then, we restarted
    Nitrogen injection into the primary containment vessel of Unit 2.
    At 2:37 pm on the same date, we confirmed the nitrogen injection
    amount (26m3/h) into the primary containment vessel was stable.

  * At 10:00 am on November 29, we started transferring accumulated water
    from the basement of Turbine Building of Unit 6 to temporary tank.

  * On November 29, since we observed decrease in water injection into
    the reactors of Unit 1-3, we adjusted the water injection amount from
    10:13 am to 10:28 am.
    -Unit 1: Adjusted the water injection amount 4.2 m3/h to 4.5m3/h from
    feed water system
    -Unit 3: Adjusted the water injection amount 1.9 m3/h to 2.1m3/h from
    feed water system ( The water injection amount from core spray system
    keeps 6.0m3/h)

  * Regarding spent fuel pool for unit 4, from August 20 to November 8,
    we had decreased salinity by using the desalting facility. In order
    to decrease more salinity, we installed Ion exchange equipment and
    started the equipment at 10:58 am on November 29.

  * At 9:12 am on November 28, the alarm indicating that the difference
    of flow rates between at the entering and the exit of the primary
    pump at the alternative cooling system for the spent fuel pool is big
    went off, and the system automatically stopped. At 9:16 am on the
    same date, we checked the site and no abnormality such as leakage was
    confirmed. Then, considered the cause is stuck of dust in the pipe of
    flow sensor from the investigation result, at 11:50 am on November 29,
    we started the system and flushed. Then, we confirmed the flow sensor
    was operating normally. We will monitor the status of the system
    operation.

   * At 12:06 pm on November 29, we observed water leakage from a pin
     hole at the pipe arrangement between the water desalination facility
     an the buffer tanks (the leakage amount : approximately 500cc). then,
     we replaced the pipes and confirmed the leakage was stopped. In
     addition, there is no influence to the water injection into the
     reactor due to enough desalination water.

   * At 12:30 pm on November 29, we started dust sampling by using a
     robot near the opening section for equipment hatch and truck bay
     door of Unit 1 Reactor building. At 1:00 pm on the same date, we
     finished the sampling.

· 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 29, 2011) (PDF 355KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)

* Revised past progress