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 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 10:00 am on November 29, we started transferring accumulated water
from the basement of Turbine Building of Unit 6 to temporary tank. At
4:00 pm on the same date, we stopped the transferring.
* On November 29, sampling survey of gas at the gas management system of
Unit 2 primary containment vessel was implemented. As a result of the
analysis, we regarded the situation was not recriticaly because the
radioactive density at the gas management system of Unit 2 primary
containment vessel was under ND (1.1 x 10-1Bq/cm3), the criteria of
recriticaly is 1 Bq/cc. Regarding Xe-135, its radioactive density was
detected by charcoal filter* (we regarded spontaneous fission).
According to the Report with regard to "Policy on the mid term security"
for the Units 1 to 4 of Fukushima Daiichi Nuclear Power Station to
Nuclear and Industrial Safety Agency at the Ministry of Economy, Trade
and Industry (1) (revision) (for public on November 9), the situation
of recriticaly therefore should be regarded by the sampling survey of
gas at the gas management system of Unit 2 primary containment vessel
by vial.
* Detection Limit Charcoal filter: 10-6 level, Vial: 10-1 level
* At 8:59 am on November 30, we stopped the transferring accumulated
water from the basement of Turbine Building of Unit 2 to the
centralized radiation waste treatment facility (miscellaneous solid
waste Volume reduction treatment building [high temperature incinerator
building]).
· 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 10:00 am, November 30, 2011) (PDF 183KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)
* Revised past progress