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.
* The underlined parts are the 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 around 3:00 pm on October 3, TEPCO staff observed an oil leakage
from the transformer B system for transportation of Okuma 3 line
(in-vehicle) while on patrol. The amount of the oil leakage was about
one drop in ten seconds and the oil formed an oil film of approximately
1m x 1m. An emergency procedure was taken to stop the leakage. As the
preparation of repair materials, replacement of oil cooler of
transformer will be start from November 22, on November 21 today, to
switch source of electricity load receiving at this transformer from
Okuma-line No.3 to Okuma-line No.2, series of water treatment
facilities currently under operation such relevant facilities as
Cesium adsorption apparatus, secondary cesium adsorption apparatus,
water desalination facility (RO membrane type), evaporative
concentration apparatus) will be out serviced accordingly from 5:00 am
today. There will be no effect on the water injection into reactor as
water injection will be continued by using desalinated water stored in
the tank. At 2:06 pm, switching of source of electricity load to Okuma-
line No.2 completed. Afterwards, we restarted related facilities
sequentially, and all facilities which had been stopped were resumed
at 11:50 pm on the same day.
* At 10:00 am on November 21, transfer of accumulated water under ground
of turbine building of unit 6 to temporary tank started. The transfer
was stopped at 4:00 pm on the same day.
· 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.
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Appendix: Past Progress (As of 9:00 am, November 22, 2011) (PDF 152KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)
* Revised past progress