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)
-For the purpose of Unit 6 water intake inspection, at 9:05 am October 21,
unit 6 seawater pump of Equipment Water Cooing System was shutdown, and
stopped cooling the spent fuel pool. At 9:13 am, the pump of Residual
Heat Removal System (A) was stopped and stopped cooling the reactor.
After the inspection was finished, the cooling for the reactor was
resumed by restarting the pump of Residual Heat Removal System (A). At
4:01 pm, the cooling for spent fuel pool was resumed by restarting the
seawater pump of Equipment Water Cooling System. As a result of this
interruption, the water temperature in the reactor increased temporarily
from 24°C to 32.1°C. The water temperature for the spent fuel pool
increased temporarily from 25°C to 26.5°C
-At 10:00 am October 21, transportation of accumulated water, which was
transferred from unit 6 turbine building to temporary tank before, to
mega float. At 4:00 pm, the transfer was stopped.
·Fukushima Daini Nuclear Power Station:
Units 1 to 4: shutdown due to the earthquake
-Out of 7 monitoring posts set at the boundary of the plant site, we
started the replacement work of No.6 for the purpose of the preventive
measure. The work was planned to be conducted from Oct 11 to 21. This
monitoring post was not able to measure airborne radiation dose
temporarily during the work, however, we continued to measure the dose by
the other 6 monitoring At 7:00 pm on Oct. 21, replacement work was
completed. While replacement work was under way, the data for the
monitoring post was not recorded. However, we have confirmed that there
have been no significant changes to the data taken from other monitoring
posts.
·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 9:00 am on October 22, 2011) (PDF 109KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011)(PDF 225KB)
* Revised past progress