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 around 1:50 am on April 5, as the leakage was found from the piping (pressure-proof hose) which transfer condensed water from the water desalinator to the condensed water storage tank, for the purpose of continuous trend monitoring, we conducted sampling of the seawater around the exit of the ditch for general water discharge on April 9. As a result of the sampling, though gamma nuclide was detected it was at the same level of detection limit and it was also confirmed all beta radiation was below detection limit. As series of countermeasures^* regarding this leakage were finalized, at 9:52 pm on April 9, we started water desalinator (reverse osmosis membrane) to recommence the treatment of accumulated water. At 9:48 am on April 10, the second cesium adsorption apparatus started and reached the normal operation flow (40.0 m³/h) at 9:50 am on the same day. Desalinator (reverse osmosis membrane) will be operated intermittently considering the water balance.
* Series of countermeasures
・Setting of absorbent to the leaking point. Setting of sandbags to the connecting point of U-drainage ditch and general water discharge
・Collection of accumulated water in the drainage and cleaning, and collection of cleaning water.
・Setting of sandbags along with the transfer line from suppression pool water surge tank (SPT)(B) to desalinator (reverse osmosis membrane) to prevent expansion the leakage (SPT building side, slope, drainage, around manhole).
・Hose from outlet of condensed water feed pump to RO condensed water pool was replaced with the polyethylene pipe (the line which is currently used for the desalination).

-At 10:00 am on April 9, we started transferring the accumulated water from the basement of T/B of Unit 6 to the temporary tanks. At 4:00 pm on the same day, we stopped transferring. At 10:00 am on April 10, we started transferring.

-At 9:30 am on April 10, we started transferring of accumulated water from the Site Banker Building to Process Main Building at Centralized Radiation Waste Treatment Facility.

-At 1:31 pm on April 10, we started transferring of accumulated water from the basement of T/B of Unit 3 to the Centralized Radiation Waste Treatment Facility (Miscellaneous Solid Waste Volume Reduction Treatment Building [High Temperature Incinerator Building]).

・Fukushima Daini Nuclear Power Station:
  Units 1 to 4: shutdown due to the earthquake

・Kashiwazaki Kariwa Nuclear Power Station:
  Units 1 to 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 April.
Daily supply and demand balance is announced at our "TEPCO Electricity Forecast".

Appendix: Past Progress (As of 3:00 pm on April 10, 2012) (PDF 284KB)
Appendix: Past Progress (Record from March 11, 2011 to December 31,2011)
* Revised past progress