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 9:30 am on April 3, we started transferring the accumulated water from the basement of T/B of Unit 6 to the temporary tanks. At 3:30 pm on the same day, we stopped transferring. At 10:00 am on April 4, we resumed transferring.

* At 8:30 am on April 4, in the second cesium adsorption apparatus, because we observed the treated volume gradually decreased, we temporarily stopped the apparatus to wash the filter. At 11:20 am on the same day, we restarted the apparatus and the flow rate reached the normal volume (about 40.0m³/h) at 11:30 am.

* At around 10:55 am on April 4, a TEPCO employee found the measurement flow volume of the nitrogen injection line to PCV of Unit 1-3 and RPV was 0 m³/h at the Seismic Isolated Building. When we checked the equipment, we found the nitrogen supply system (nitrogen/gas separator B) was stopped due to failure alert of compressor. After that, at 12:16 pm on the same day, we started a stand-by nitrogen supply system (nitrogen/gas separator A) and we restarted the nitrogen supply to PCV of Unit 1-3 and RPV at 12:29 pm. No significant changes of pressure of PCV of Unit 1-3 and density of hydrogen were confirmed.

* In the alternative cooling system for spent fuel pool of Unit 4, since we observed that the suction pressure of the circulating pump of the primary system tended to decrease, we temporarily stopped cooling the spent fuel pool by stopping the operation of the pump, in order to flash the suction strainer of the pump at 1:50 pm on April 4 (Water temperature in the pool at the time of stop of operation: approx. 26 °C). We forecast the temperature increases at a rate of about 0.5 °C/h (we plan to interrupt for 2 hours). It is not expected to affect the control of water temperature of the spent fuel pool.

·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 March.
Daily supply and demand balance is announced at our "TEPCO Electricity Forecast".

Appendix: Past Progress (As of 3:00 pm, on April 4, 2012) (PDF 521KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)
* Revised past progress