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".
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.

* 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 10:12 am on December 17, we started transferring accumulated water
  from the basement of Unit 2 turbine building to Centralized Radiation
  Waste Treatment Facility (Miscellaneous Solid Waste Volume Reduction
  Treatment Building [High Temperature Incinerator Building] and Process
  Main Building). At 12:24 pm on the same day, we stopped the transfer
  since the water level at Unit 2 turbine building did not change. Then
  we confirmed at the site that the switching valve of the transfer line
  was closed and that there was no leakage from the line. Then we opened
  the valve and restarted the transfer at 1:22 pm on the same day. At 9:58
  am on December 18, we stopped the transfer.

* At 10:00 am on December 18, during the patrol activity, a TEPCO
  employee found an accumulated water in the trench located between the
  process main building of Centralized Radiation Waste Treatment Facility
  and Miscellaneous Solid Waste Volume Reduction Treatment Building (High
  Temperature Incinerator Building). The depth of the water was estimated
  to be 50 cm and the amount was to be 125 m3. The radiation dose at the
  water surface was 3 mSv/h (provisional value). As no radioactive
  materials have been detected during the last sampling survey of sub
  drain water near the trench, the source of the accumulated water is
  estimated to be the ground water or dew condensation water. We will
  continue our investigation of the water source and sampling survey of
  the water in the trench.

· 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 18, 2011) (PDF 494KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)

* Revised past progress