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)
* At 1:22 pm on March 22, the inclusion of hydrazine into the SFP, Unit 3 was started by using the circulating cooling system. At 3:05 pm on the same day, we stopped the inclusion of hydrazine.
* At 10:00 am on March 22, regarding the water accumulated at the basement of T/B, Unit 6, a transfer to the temporary tank started. At 4:00 pm on the same day, we stopped transferring. At 10:00 am on March 23, we started transferring to the temporary tank at the basement of T/B, Unit 6.
* On March 21, 2012, we carried out the sampling for the PCV gas control system of Unit 2. As the result of the analysis, we confirmed that the concentration of Xe-135 was below the detectible limit (9.1 x 10-2 Bq/cm3) and less than the re-criticality state judge standard (1 Bq/cm3).
* When we were working the related thermometer of reactor pressure vessel / primary containment vessel of Unit 1, we found out that the signal cables of thermometer of VESSEL DOWN COMMER 130°(TE-263-69G2) has been connected not only the input of the correct recorder but also the input of VESSEL DOWN COMMER 15°(TE-263-69G1) and the signal cables of thermometer of VESSEL DOWN COMMER 15°(TE-263-69G1) has not been connected the input of the recorder. VESSEL DOWN COMMER 15°(TE-263-69G1) is monitor measuring instrument on the safety regulation (Article 138 and 143) but we confirmed that this thermometer was out of data in the past, so we excluded from monitor measuring instrument on the safety regulation (Article 138 and 143) after data collecting at 9:00 pm on March 22. We are monitoring by another thermometers according to the temperature monitoring of reactor pressure vessel.
･ 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 3:00 pm, on March 23, 2012) (PDF 503KB)
Appendix:
Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)
*
Revised past progress
