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 on July 19 we accomplished the Step1 target "Radiation dose
is in steady decline". Then on December 16 we confirmed the
accomplishment of the Step 2 target "Release of radioactive materials is
under control and radiation doses are being significantly held down".
In addition, on December 21, we have compiled the "Mid-to-long-Term
Roadmap toward the Decommissioning of Fukushima Daiichi Nuclear Power
Units 1-4, TEPCO".
In addition to the maintenance of the plant's stable condition, we will
implement Mid-to-Long Term countermeasures towards the decommissioning of
Fukushima Daiichi Nuclear Power Units 1-4 to enable evacuees to return to
their homes as soon as possible and reduce the anxiety of the people in
Fukushima and the whole nation as soon as possible.

Below is the status of TEPCO's major facilities.

* Updates since the previous press release underlined.

[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 2:35 pm on December 24, we started transferring accumulated water
    from the basement of turbine building of Unit 3 to the Centralized
    Radiation Waste Treatment Facility (Miscellaneous Solid Waste Volume
    Reduction Treatment Building [High Temperature Incinerator Building]
    and the Process Main Building). At 9:50 am on December 26, we stopped
    it.

  * At 10:00 am on December 26, we started to transfer accumulated water
    from the basement of turbine building of Unit 6 to the temporary
    tanks.

  * At 10:10 am on December 26, we started to transfer accumulated water
    from the basement of turbine building of Unit 2 to the Centralized
    Radiation Waste Treatment Facility (Miscellaneous Solid Waste Volume
    Reduction Treatment Building [High Temperature Incinerator Building]
    and the Process Main Building).

  * On December 26, as to the injection of nitrogen into the Primary
    Containment Vessel of Unit 1 and gas emission from gas management
    system of for the Primary Containment Vessel, considering the
    operating track record, we changed the volume of nitrogen injection
    and the emission amount from the gas management system. At 1:22 pm on
    the same day, we adjusted the volume of nitrogen injection into the
    Primary Containment Vessel from approx. 13m3/h to approx. 8m3 / h.
    At 1:43 pm on the same day, we adjusted the emission amount from the
    gas management system from approx. 28m3/h to approx. 23m3/h.

  * At 1:36 pm on December 26, we started to inject hydrazine into the
    spent fuel pool of Unit 2 with circulating injection cooling system.

  * At 2:00 pm on December 26, in the alternative cooling system of the
    spent fuel pool of Unit 3, as the inhale pressure of the primary
    circulating pump showed the tendency of decrease, we stopped the pump
    in order to conduct flushing of the strainer on its entry side and
    suspended cooling the spent fuel pool. The temperature of the pool at
    the time of the suspension was approx. 13°C and expected temperature
    increase is approx. 0.25°C/h (the duration of the suspension is
    approx. 1 hour 30 minutes), and there is no problem with the water
    temperature of the spent fuel pool.

· 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, December 26, 2011) (PDF 250KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)

* Revised past progress