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.
Past Progress (As of 3:00 pm, on July 2, 2012) (PDF 450KB)
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 10:00AM on July 2, we started transferring accumulated water in Unit 6 Turbine Building basement to the temporary tank.
- At 10:08AM on July 2, on the basement level 1 of Unit6 Turbine Building, after the inspection of the dehumidifier for the compressed air system (IA system) was completed and the power of the dehumidifier was turned on, we found white smoke breaking out from the control panel. Immediately we shut off the power of the control panel for the dehumidifier. At 10:21AM on the same day we reported to a fire department. At 10:25AM on the same day no white smoke was confirmed. At 10:26AM on the same day, burn marks were confirmed on the transformer in the control panel. Afterward as a result of on-the-spot investigations by Namie fire station and Tomioka fire station, because the cause or facts could not be identified through visual checks for the appearance of the transformer, on July 3 after removing the transformer, investigations will be conducted again. This event does not cause any radioactive influence to the outside area.
- At 10:11AM July 2, we started transferring accumulated water from Unit 2 Turbine Building basement to the Central Radioactive Waste Treatment Facility (Miscellaneous Solid Waste Volume Reduction Treatment Building [High Temperature Incinerator Building].
- In order to prevent constructional materials of Unit 2 spent fuel pool from corrosion progress or damage the desalination had been carried out (on April 12 the desalination by ion exchange instrument was started) since January 19. As a result, on July 2, we confirmed that chlorine level has fallen from approx.1,350ppm (as of operation start) to approx.11ppm. This led completion of desalination for Unit 2.
[Fukushima Daini Nuclear Power Station]
· Unit 1 to 4 : Shutdown due to the earthquake.
Past Progress (From March 11, 2011 to December 31, 2011) (PDF 523KB)
* Revised past progress
The aforementioned attachments are only available in Japanese.
We apologize for any inconvenience this may cause.