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 October 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 10:00am on October 31, transfer of accumulated water which was
transferred to temporally tank from Unit 6 turbine building to mega float
started.
- At 10:02 am on October 31, transfer of accumulated water from Unit 2
turbine building underground to centralized radiation waste treatment
facility(Miscellaneous Solid Waste Volume Reduction Treatment Building
[High Temperature Incinerator Building]) is suspended.
- At 10:12 am on October 31, we started injection of hydrazine to spent
fuel pool of Unit 2 through the circulating cooling system. At 11:50 am,
we stopped hydrazine injection.
- At 2:59 pm on October 31, we adjusted the amount of water injection to
the reactor of Unit 1 to approximately 7.5m3/h in order to improve the
working environment inside the covering, making it sure to mitigate the
steam emission at the reactor building of Unit 1.
·Fukushima Daini Nuclear Power Station:
Units 1 to 4: shutdown due to the earthquake
*Installation work of seismic isolation system in the exhaust stack started
from November 2010 has been suspended since the occurrence of injury
incident in the tower crane room due to the damage in the fixed portion of
construction tower crane from the earthquake. As the implementation of
safety countermeasure is completed, on October 31 heavy equipments were
brought into the site for the replacement of the tower crane and
installation work has restarted.
·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]
Thanks to our all customer's energy-saving efforts, we could successfully
maintain an even supply-demand balance in this summer. We express our
deepest appreciation to the efforts.
While we will continue to exert maximum effort to stabilize the supply-
demand balance, we kindly request your continued efforts in keeping
electricity consumption within reasonable levels.
Appendix: Past Progress (As of 3:00 pm on October 31, 2011) (PDF 125KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)
* Revised past progress