Press Releases 2013

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 6:54 AM on February 16, Unit 4 spent fuel pool alternative cooling system was suspended for inspection and modification of the power supply equipment (Pool water temperature when the system was suspended: 22.0℃). The system is planned to be suspended for approx. 10 hours and the pool water temperature increase rate during suspension is estimated to be 0.38℃/h. There is no problem with the pool water temperature control considering the sufficient margin to the maximum allowed temperature (65℃).

- Regarding the inside door of the large carry-in entrance of Unit 6 Reactor Building falling at 10:50 AM on February 15, investigation was carried out. During electrical work at Unit 6, a worker tried to open the inside door of the large carry-in entrance of the Reactor Building in order to carry equipment out of the building. As the limit switch failed while the inside door was opening (going up), the worker tried to close the door using the manual operation button. However, since the inside door did not stop going up (opening), the worker turned off the power to stop the inside door. Though the inside door stopped going up, it was found to have fallen down to the floor later on. Upon site investigation, no damage was found on the floor and the peripheral equipment though the inside door was damaged. The joint part between the inside door and the chain for lifting the inside door up and down was also found to be damaged. The detailed cause of the inside door falling is currently under investigation.

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

* Revised past progress

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