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 nuclear power stations (Fukushima Daiichi and Fukushima Daini).

* The updates are underlined.

[Fukushima Daiichi Nuclear Power Station]
· Unit 1 to 4: Abolishment (April 19, 2012)
· Unit 5 to 6: Outage due to regular inspections before the earthquake

- At 5:17 PM on October 22, the reactor injection water amounts at Unit 1 were changed as follows since the amounts had decreased. Feed-water system: Increased from approx. 2.7m³/h to approx. 3.0m³/h, Reactor core spray system: Increased from approx. 1.9m³/h to approx. 2.0m³/h.

- At around 12:15 PM on October 22, a worker of a cooperative company found a water leakage from the fire fighting pipe on the third floor of the spent fuel common pool building. The leaked water was identified to be filtrate water and the leakage was stopped by closing the valve. The leakage location was confirmed to be the discharge valve of the fire hydrant on the third floor of the building. The leaked water remains in the dam and its amount is estimated to be approx. 65L.

- At 8:46 AM on October 23, we stopped transferring the accumulated water from Unit 3 Turbine Building basement to the Central Radioactive Waste Treatment Facility (Miscellaneous Solid Waste Volume Reduction Treatment Building [High Temperature Incinerator Building]) for transfer pipe replacement. At 1:07 PM on the same day, the transfer was restarted.

- At 10:00 AM on October 23, we started transferring the accumulated water from Unit 6 Turbine Building basement to the temporary tank. At 3:00 PM on the same day, the transfer was stopped.

- At 9:37 AM on October 23, continuous nitrogen injection into Unit 1 suppression chamber was started. The nitrogen injection is planned to be continued for about a month until the hydrogen concentration in the suppression chamber is reduced to approx. 2%.

[Fukushima Daini Nuclear Power Station]
· Unit 1 to 4: Shutdown due to the earthquake.

Appendix: Past Progress (As of 3:00 pm, on October 23, 2012) (PDF 710KB)
Appendix: Past Progress (From March 11, 2011 to December 31, 2011) (PDF 523KB)
* Revised past progress

The aforementioned attachments are only available in Japanese.
We apologize for any inconvenience this may cause.