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 which showed a different trend 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 9, the temperature of the lower part of the RPV
(top of the lower head 135°) : approx. 41.8 °C
· At 5:00 am on March 9, the temperature of the lower part of the RPV
(top of the lower head 270°) : approx. 40.3 °C (reference)
* At 10:00 am on March 9, we started transfer of accumulated water from
the underground of Unit 6 turbine building to the temporary tank.
* On March 8, 2012, we conducted sampling of the air inside the Gas
control system of Unit 3 PCV.. As result of the analysis, we confirmed
Xenon 135 was below detection limit (9.8x10-2Bq/cm3) at the inlet of
the system and also confirmed that it was below 1.0xBq/cm3 which is
judgment criteria of recriticality.
* At 2:25 pm, on March 8, we started injecting hydrazine into Unit 4
spent fuel pool by using circulating cooling system. At 4:10 pm on the
same day, we stopped the injection.
· 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 9, 2012) (PDF 470KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)
* Revised past progress
