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 11:00 am on October 18 we found approx. 15cm depth of
accumulated water (approx. 3m3) inside the skid, during motor
replacement works of the pump (H2-2) inside the skid of the suspended
Cesium adsorption apparatus. We also confirm that leaking stopped when we
found. After that we suspended replacement work of relative motor and
started to drain of the accumulated water by submersible pump. The cause
is currently under investigation.
- At 9:44 am on October 19, we started transferring accumulated water from
the building of waste storage bunker to process main building. At 2:05 pm
on the same day, stopped transferring.
- At 10:00 am on October 19, we restarted transferring the water, which had
been transferred from Unit 6 turbine building to temporary tank, to the
mega float. At 4:00 pm on the same day, we stopped transferring.
- At 1:29 pm on October 19, we restarted 2nd Cesium adsorption system which
has been stopped operation due to the power source construction of
desalination unit.
- At 2:30 pm on October 19, we stopped seawater line pump of residual heat
removal system (C) after stopped cooling reactor by residual heat system
(A) due to the downward trend on the flow rate and pressure of the Unit 6
residual heat removal system. After that we restarted sea water pump of
residual heat removal system (C) and as we confirmed the related pump
returned to running at specified performance, we restarted cooling reactor
by residual heat removing system (A) at 3:02 pm on the same day. The
temperature of the reactor water is rose 21.6 deg C to 22.1 deg C
temporarily by this suspension.
·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.
Appendix: Past Progress (As of 4:00 pm on October 19, 2011) (PDF 104KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011)(PDF 225KB)
* Revised past progress
