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 5:31 pm on October 25, we started transferring the accumulated water
brought from the basement of turbine building of Unit 1 to the basement
of turbine building of Unit 2.At 2:01 pm on October 26, we stopped
transferring.
- At 1:17 pm on October 26, we started cutting off the designated piping
after confirming that the hydrogen density inside the piping for cooling
in case of reactor shutdown was less than 0.1 %, as one of the
construction work to install gas monitoring system inside the Primary
Containment Vessel.
- At 1:05 pm on October 26, we started nitrogen purge of the designate
system after confirming that hydrogen is stored with the density of
6.5 % when connecting piping arrangements on October 20, 2011, as one
of the construction work to install gas monitoring system inside the
Primary Containment Vessel. We finished the nitrogen purge at 1:42 pm
because we confirmed that the hydrogen density was 0%.
- At 9:47 am on October 26, for the water injection to the reactors of
Units 1 to 3, we switched from normal water injection line to emergency
water injection line, due to the shutoff of facilities for power source
reinforcement work. Along with the switching work, we adjusted the
amount of water injection from water feeding system to approximately
3.8 m3/h for Unit 1's reactor. Likewise, we adjusted the amount of
water injection to Unit 2's reactor to approximately 3 m3/h from water
feeding system, and to approximately 8m3/h from Core Spray System.
- At 10:00 am on October 26, we started transferring the accumulated water
from the basement of turbine building of Unit 6 to the temporary tanks.
- On October 26, we replaced the vane to adjust flow amount of water
injection line to the Unit 3's reactor in order to improve the ability
to control the water injection amount.
·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]
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.
![](../../images/dot_w720.gif)
Appendix: Past Progress (As of 3:00 pm on October 26, 2011) (PDF 113KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011)(PDF 225KB)
* Revised past progress