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 10:00 AM on January 16, we started transferring the accumulated water in Unit 6 Turbine Building basement to the temporary tank. At 3:00 PM on the same day, the transfer was stopped.

- On January 16, when a TEPCO employee was trying to close the sampling pipe of the reactor component cooling system heat exchanger (B) outlet pipe of Unit 6 component seawater system^*, seawater started leaking from the sampling pipe (where it's connected with the component seawater system main pipe) at around 1:38 PM on the same day. The amount of seawater leaked on the floor was approx. 240L. The leakage stopped after isolating the leakage location at 3:33 PM on the same day. The cooling function of the spent fuel pool cooling purification system was suspended due to the isolation. The spent fuel pool water temperature was 19.6℃ and the pool water temperature increase rate when the cooling function was suspended was estimated to be approx. 0.2℃/h. There is no problem with the pool water temperature control considering the sufficient margin to the maximum allowed temperature (65℃). In the case that the pool water temperature increases, an alternating operation between the shutdown cooling system (for cooling the reactor) and the emergency heat load operation (for cooling the spent fuel pool) of the residual heat removal system will be performed.
* Used for cooling the spent fuel pool cooling purification system.

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

* Revised past progress

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