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.
* The updates are 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 before the earthquake)
* With regard to the thermometer placed at the lower part of RPV (top of
the lower head 135°) whose trend were different while others showed
the increasing trend after we decreased the water injection rate to the
Unit 2 Reactor from the feed water system on February 22, we reported
to Nuclear and Industrial Safety Agency of Ministry of Economy, Trade
and Industry on March 1. We will continue monitoring this thermometer.
· At 5:00 am on March 13, the temperature of the lower part of the RPV
(top of the lower head 135°) : approx. 39.9 °C
· At 5:00 am on March 13, the temperature of the lower part of the RPV
(top of the lower head 270°) : approx. 40.3 °C (reference)
* According to the power supply construction for reliability improvement
and reinforcement of offsite power after the earthquake disaster, at
11:17 am on March 12, 2012, we started conducting to receive with
ookuma-line No.4 and south switching station, and we finished
conducting to receive at 3:58 pm on the same day.
* In order to stop the offset power and change the station power supply
with starting to operate the south switching station, we stopped the
operation of desalination facility (reverse osmosis membrane type) at
4:25 am on March 13, 2012,and the cesium adsorption instrument No.2 at
5:43 am on the same day. We will resume the operation when we finished
changing the station power supply.
* At 10:10 am on March 10, 2012, we started the transfer of accumulated
water from the basement floor of the turbine building of Unit 3 to the
centralized radiation waste treatment facility (Miscellaneous Solid
Waste Volume Reduction Treatment Building [High Temperature Incinerator
Building]). At 9:53 am on March 13, we stopped transferring.
* At 10:00 am on March 12, we started transferring the water accumulated
in the basement of Unit 6 Turbine Building to temporary tanks. At 4:00
pm on the same day, we stopped transferring, and at 10:00 am on March
13, we started transferring again.
· Fukushima Daini Nuclear Power Station:
Units 1 to 4: shutdown due to the earthquake
· Kashiwazaki Kariwa Nuclear Power Station:
Units 6: under normal operation
(Units 1 to 5 and 7: outage due to regular inspections)
[Thermal Power Station]
· Power supply has returned to normal and the facilities damaged by the
earthquake are now being handled in a timely manner.
[Hydro Power Station]
· Power supply has returned to normal and the facilities damaged by the
earthquake are now being handled in a timely manner.
[Impacts on Transmission Facilities]
· Power supply has returned to normal and the facilities damaged by the
earthquake are now being handled in a timely manner.
[Impacts on Power Supply and Demand Balance]
We expect to maintain stable power supply in March.
Daily supply and demand balance is announced at our "TEPCO Electricity
Forecast".
Appendix: Past Progress (As of 10:00 am, on March 13, 2012) (PDF 478KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)
* Revised past progress