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 around 2 pm on October 23, TEPCO's employee found seemingly oil spill
outside the oil retaining wall of temporary oil tank for main transformer
in the power plant premise (Wild Bird Forest). The detail is under
investigation.
- At 10:35 am on October 22, we started transfer of the accumulated water
from the basement of Turbine Building of Unit 1 to the basement of
Turbine Building of Unit 2. At 9:07 am on October 24, we stopped transfer.
- At 9:18 am on October 24, transportation of accumulated water from the
basement of Turbine Building of unit 2 to Centralized Radiation Waste
Treatment Facility (Process Main Building) was stopped temporally by the
pumps change. After the pump changes, the transportation was re-started
at 9:34 am on the same day.
- At 10:00 am on October 24, we restarted to transfer the accumulated water,
which had been transferred from the turbine building of Unit 6 to the
temporary tank, from the temporary tank to Mega Float. At 11:30 am on
the same day, we stopped transfer.
- At around 11:30 am on October 24, we observed the water leakage (about
20 litters) from the axis seal region of the law water pump (for 2-1
skids use) which was a constitution apparatus of the Water Desalination
Facility (RO membrane unit) 2 of the water treatment system and we
stopped the facility. Afterward, the water leakage was confirmed to be
stopped.
· Fukushima Daini Nuclear Power Station:
Units 1 to 4: shutdown due to the earthquake
- At around 2:50 pm on October 17, we confirmed that a worker of partner
company who was engaged in cleaning inside of Primary Containment Vessel
of Unit 4 was exposed to radiation 1.58mSV, which is excess to the
planned radiation 0.9mSV. After the result of the investigation, we
guessed that the radiation administrator set the working time without
featuring the work of near the high radiation place, because he missed
the high radiation dose which was confirmed by pre- measurement.
Furthermore, the worker was not aware of the sound of his APD and kept
the work, since he had on his hood mask and was using a cleaner.
· 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 24, 2011) (PDF 109KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011)(PDF 225KB)
* Revised past progress