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 November 1, transfer of accumulated water which was
transferred to temporally tank from Unit 6 turbine building to mega float
started. The transfer was stopped at 4:00 pm on the same day.
* At 3:50pm on November 1, we adjusted injecting water volume into the
reactor Unit 2 at approx. 3.0 m3/h from reactor feed water system and at
approx. 7.0 m3/h from core spray system.
* We found a possibility to detect short-half-life radionuclide such as
Xe-133 and Xe-135 according to our radionuclide analysis sampled on
November 1 by the gas management system of the reactor containment vessel
of Unit 2. We continued to monitor the temperature, pressure and data
from monitoring post and there was no significant fluctuation from those
data. As we can't be denied a possibility of fission reactions, we
decided to start injecting boric acid water from reactor feed water
system at 2:48am and stopped it at 3:47 pm on the same day.
·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]
This winter, there will be some minus factors such as the regular
inspection of Unit 5 at Kashiwazaki-Kriwa Nuclear Power Station. On the
other hand, there will be several plus factors such as the recovery of the
common thermal power stations which suffered the earthquake. As a result,
we expect to secure 54.9 million kW (at the end of December), 54.6 million
kW (at the end of January), 53.7 million kW (at the end of February) supply
power.
Compared to the maximum demand in the last winter, which is 51.5 million
kW, we will have 2.2 - 3.4 million kW generation reserve margin.
We expect to maintain stable power supply this winter, however, as there
remains possibilities of unplanned shutdowns at our power stations and
growth in the demand according to the rapid change in the temperature, we
would like to ask your reasonable effort to save electricity.
We will continue to make our efforts to maintain stable operation and
maintenance of the power facilities in order to "prevent in principle" the
planned blackouts and secure power supply.
Appendix: Past Progress (As of 9:00 am on November 2, 2011) (PDF 126KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)
* Revised past progress
