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.
* Updates since the previous press release underlined.
[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 9:10 am on December 16, a cooperative firm worker discovered the burnt
trace in the distribution panel at Centralized Waste Treatment Facility
(Miscellaneous Solid Waste Volume Reduction Treatment Building [High
Temperature Incinerator Building]). But a smoke was not found. We reported
the incident to the fire station at 9:19 am on the same day. At 10:28, we
stopped power supply to the distribution panel. Afterwards, as the result
of confirmation at the site of this facility by fire station, at 12:05 pm,
it is considered that the fire was not occurred. At 2:30 pm, we resumed
power supply to the distribution panel.
*At 9:40 am on December 16, as the decreasing of injecting water was
confirmed, we adjusted injection rate of core spray system from approx.1.6
m3/hour to approx.2m3 /hour. (the injection of feed water system is
continuing at 4.5 m3/h)
*At 11:38 am on December 16, as we found that there was high vibration at
desalination plant (RO) unit 2-2 high pressure pomp, we manually stopped
the desalination plant. We confirmed that there is no water leakage at the
site. We will study on its countermeasure later. On the other hand,
desalination plant (RO) unit 2-1 is in operation. And water injection to
the Reactors will not be affected since the cooling is continued by using
processed water in the buffer tank.
·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.
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Appendix: Past Progress (As of 3:00 pm, December 16, 2011) (PDF 228KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)
* Revised past progress