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 4:57 PM on May 22, the amount of water injection into Unit 1 and 3 reactors was adjusted as the water level decreased.
Unit 1: The water injection amount was increased as below.
From the supply water system: Approx. 4.0m³/h to 4.5m³/h
From the reactor core spray system: Approx. 1.7m³/h to 2.0m³/h.
Unit 3: The water injection amount was increased as below.
From the supply water system: Approx. 1.4m³/h to 2.0m³/h
From the reactor core spray system: Approx. 4.8m³/h to 5.0m³/h.

* At 8:23 AM on May 23, the second cesium absorption apparatus was temporarily stopped for filter backwashing.

* At 10:00 AM on May 23, we started transferring the accumulated water from Unit 6 Turbine Building basement to the temporary tank.

* At 8:35 AM on May 15, we started transferring the accumulated water from Unit 2 Turbine Building basement to the Centralized Radiation Waste Treatment Facility (Miscellaneous Solid Waste Volume Reduction Treatment Building [High Temperature Incinerator Building]). At 10:00 on May 23, we stopped transferring.

* At 10:15 on May 23, we started transferring the accumulated water from Unit 2 Turbine Building basement to the Centralized Radiation Waste Treatment Facility (Process Main Building).

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

* The transmission system of the monitoring posts (No. 1-7) located at the power station site boundary will be under inspection from May 21.
No. 6: 1:31 PM to 5:20 PM on May 21
No. 1: 9:11 AM to 11:30 AM on May 22
No. 2: 1:11 PM to 5:10 PM on May 22
No. 7: 9:11 AM to 11:10 AM on May 23
No. 3: From 1:31 PM on May 23

Appendix: Past Progress (As of 3:00 pm, on May 23, 2012) (PDF 322KB)
Appendix: Past Progress (From March 11, 2011 to December 31, 2011) (PDF 460KB)
* Revised past progress