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, 2011, we have compiled the roadmap towards restoration from the
accident and on July 19 we accomplished the Step1 target "Radiation dose
is in steady decline". Then on December 16 we confirmed the
accomplishment of the Step 2 target "Release of radioactive materials is
under control and radiation doses are being significantly held down".
In addition, on December 21, 2011, we have compiled the "Mid-to-long-Term
Roadmap toward the Decommissioning of Fukushima Daiichi Nuclear Power
Units 1-4, TEPCO".
In addition to the maintenance of the plant's stable condition, we will
implement Mid-to-Long Term countermeasures towards the decommissioning of
Fukushima Daiichi Nuclear Power Units 1-4 to enable evacuees to return to
their homes as soon as possible and reduce the anxiety of the people in
Fukushima and the whole nation as soon as possible.
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 8:17 am on January 10, we started transfer of the accumulated water
from the basement of the Unit 2 turbine building to the centralized
radiation waste treatment facility (the process main building). At 3:21
pm on January 11, we stopped the transfer. At 3:45 pm on the same day,
we started transfer of the accumulated water from the basement of the
Unit 2 turbine building to the centralized radiation waste treatment
facility (the miscellaneous solid waste volume reduction treatment
building [the high temperature incinerator building] and the process
main building). At 8:02 am on January 12, we stopped the transfer.
*At 8:58 am on December 20, 2011, we stopped the cesium adsorption
apparatus in order to adjust the water level in the respective turbine
buildings and the centralized radiation waste treatment facility (the
miscellaneous solid waste volume reduction treatment building [the high
temperature incinerator building] and the process main building). At
3:22 pm on January 11, we activated the apparatus. At 3:30 pm on the
same day, the flow rate has reached the ordinary level.
*At 3:39 pm on January 11, we started transfer of the accumulated water
from the basement of the Unit 3 turbine building to the centralized
radiation waste treatment facility (the miscellaneous solid waste volume
reduction treatment building [the high temperature incinerator building]
and the process main building). At 8:07 am on January 12, we stopped the
transfer.
*At 9:47 am on January 11, in the centralized radiation waste treatment
facility we started transfer of the accumulated water from the on-site
bunker building to the process main building. At 3:32 pm on the same day,
we stopped the transfer.
*At 4:20 pm on January 11, we activated the air ventilation/conditioning
system of the Unit 6 turbine building in order to avoid degradation of
the facilities to maintain the cold shutdown in the reactor buildings,
and in order to improve the high-humidity environment in the reactor
building. The air out of the conditioning system has been emitted
through high-performance particle filter installed at the intake and
exhaust side.
*Because of the finding of accumulated water included radioactive
materials at the trench between the process main building and the
miscellaneous solid waste volume reduction treatment building[high
temperature incinerator building](December 18, 2011), we started the
inspection of other trenches at the site on January 11.
As a result of the inspection of January 11, the locations where
accumulated water was discovered and the nuclide analysis results are as
follows:
·The Unit 2-4 DG connecting duct
I-131:below measurable limit, Cs-134:approx. 1.9x100Bq/cm3,Cs-137:
approx. 2.6x100Bq/cm3
·The accumulated water treatment building-the connecting duct in the
Unit 1 turbine building
I-131:below measurable limit, Cs-134:approx. 8.8x10-1Bq/cm3,Cs-137:
approx. 1.3x100Bq/cm3.
*At 9:35 am on January 12, we stopped the Unit 3 spent fuel pool
alternative cooling system in order to install a radioactive materials
removal equipment in the Unit 3 spent fuel pool (the temperature of the
spent fuel pool at the time of the stoppage: approx. 12.7°C). As the
estimated increase of the temperature is 0.22°C/h (the outage time:
approx. 4 hours 30 minutes), there is no problem regarding the
temperature of the spent fuel pool.
·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.
Appendix: Past Progress (As of 10:00 am, January 12, 2012) (PDF 321KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)
* Revised past progress
