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 November 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.
* Underlined are updates since 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)
* We are planning to establish the system injecting water into the reactor
in Unit 1 to 3 using the condensate storage tank of Unit 3 as part of
reliability improvement of reactor water injection. During the
measurement of salt concentration in the left out water, it turned out
that concentration was high. To lower the salt concentration, we decided
to reduce the left out water and feed water. Before feeding water, from
10:00 am on December 6 to 8:54 am on December 7 we transferred the left
out water from the tank to the basement of the turbine building of Unit
3. At 9:19 am on the same day we started feeding water to the tank. Then
we discovered that there was a leak of water (approx. 5l) from the
connecting part of the hose and the tank. At 9:52 am we stopped water
transfer and confirmed that the leak stopped. After that, we finished
changing the hose. From 9:05 am on December 9, we started feeding water.
At 9:25 on the same day, we finished checking the water feeding line for
water leakage. At 7:00 pm on the same day, we finished the filling.
* At 10:00 am on December 8, regarding the water accumulated underground
the Turbine Building of Unit 6, we started transfer to Temporary Tank. At
4:00 pm on December 9, we stopped the transfer.
* At 9:00 am on December 10, we started dust sampling above the reactor
building of Unit 3 with a large crane.
· 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-Kariwa 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 GW (at the end of December), 54.6 GW (at the end
of January), 53.7 GW (at the end of February) supply power.
Compared to the maximum demand in the last winter, which is 51.5 GW, we
will have 2.2 - 3.4 GW 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.
![](../../images/dot_w720.gif)
Appendix: Past Progress (As of 9:00 am, December 10, 2011) (PDF 398KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)
* Revised past progress