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 10:00 on March 28, we started the transfer of accumulated water from the basement of Unit 6 T/B to the temporary tank. At 4:00 pm on the same day, we suspended. At 10:00 on March 29, we restarted the transfer.
- At 5:41 am on March 27, the cooling of the spent fuel pool of Unit 4 was stopped (water temperature at the time of stoppage: approx. 24 ℃) in order to implement the replacement of flexible hose in the primary coolant system and pump inlet strainer in the secondary coolant system. Stoppage is scheduled to continue till March 28. The increasing rate of the water temperature is estimated to be approx. 0.5 ℃/h, therefore no material issue in the management of the pool temperature is expected. At 4:35 pm on March 28, we restarted the cooling of the spent fuel pool since we finished the replacement. (The water temperature of the spent fuel pool was approx. 33 ℃ when we restarted the cooling)
- At 9:08 am on March 29, 2012, as for the Centralized Radiation Waste Treatment Facility, we started to transfer accumulated water from the On-site Bunker Building to Process Main Building.
- At 10:30 am on March 29, 2012, we started the trial run of the station common diesel generator (A). At 1:00 pm on the same day, we confirmed no abnormalities and completed the restoration of the station common diesel generator (A).
- At approx. 11:00 am on March 29, 2012, as for Unit 1, we confirmed that the indicators for reactor water level (fuel range)B, pressure of PCV and pressure of suppression chamber were disabled. Afterwards, we reset the power of the indicators. At 12:56 pm on the same day, we confirmed that the indicators recovered normal condition. Now, the cause is under investigation. While data monitoring was disabled, the key parameters in terms of safety were continued to be monitored using other indicators. Because we confirmed that there has been no significant fluctuation of the parameters, we concluded that there is no problem in terms of safety.
- At 1:26 pm on March 29, 2012, we started cyclic cooling for the water in the spent fuel pool by an alternative cooling equipment of the Fuel Pool Cooling and Filtering System of Unit 4.

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

- Periodic inspection of the monitoring posts (7 in total: from No.1 to 7) located at the site boundary was started from March 27.
  No. 1: From 10:11 am to 11:30 am on March 27
  No. 2: From 2:21 pm to 3:40 pm on March 27
  No. 3: From 10:01 am to 11:10 am on March 28
  No. 4: From 1:31 pm to 2:40 pm on March 28
  No. 5: From 3:11 pm to 4:20 pm on March 28
  No. 6: From 10:01 am to 11:20 am on March 29
  No. 7: From 1:31 pm to 2:30 pm on March 29
- At 9:39 am on March 29, we found the defect that unable to transmitting data to the Emergency Response Support System at Unit 2. At 9:40 on the same day, the defect was resolved automatically. Since data has been transmitted correctly there after, we suppose that it was transient phenomenon.

・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 March 29, 2012) (PDF 515KB)
Appendix: Past Progress (From March 11, 2011 to July 31, 2011) (PDF 225KB)
* Revised past progress