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 10:00 AM on June 28, we started transferring the accumulated water in Unit 6 Turbine Building basement to the temporary tank.

- At 2:01 PM on June 27, within the Unit 2 spent fuel pool alternative cooling system, we confirmed that the alarm indicating an abnormality at Main Anti-Earthquake Building. At 2:22 PM, the alarm indicating "large difference in primary water flow" went off, and we confirmed that the cooling pump (A) in operation stopped automatically by the web camera at Main Anti-Earthquake Building. At 2:40 PM, we confirmed that there was no leak from the system on site. Since we estimated that the water temperature of the spent fuel pool was 22.9 °C and the temperature rising rate was at approx. 0.24 °C/h when the system was stopped, there was no problem on the pool water temperature management. As a result of the investigation, we assumed that the error alarm indicating "large difference in primary water flow" went off due to the short circuit of the cable by mistake during the installation work of the flowmeter digital recorder on site. Since we conducted the inspection of the flowmeter, etc. and confirmed the integrity on June 28, we restarted the Unit 2 spent fuel pool alternative cooling system at 2:46 PM on the same day. When the system started up, the pool water temperature was 26.4 °C.

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

Appendix: Past Progress (As of 3:00 pm, on June 28, 2012) (PDF 443KB)
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.