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
- On October 13, 7 thermometers were newly installed in Unit 1 PCV. As for the two new thermometers installed at the same height as the existing thermometers, their behaviors at the time of fluctuations in the reactor injection water amount and outdoor air temperature and the stability of their readings were evaluated. As no problem was found with their performance, the thermometers were put in operation as the monitoring instrument stipulated by Article 138 of the technical specification at 12:00 AM on December 4.
- At 8:42 AM on December 4, the second cesium absorption apparatus was suspended in order to replace the pressure hose with polyethylene pipe (in the backup line of the accumulated water transfer line) for the purpose of its reliability improvement. In response to this, the cesium absorption apparatus was started at 10:34 AM on the same day and the steady flow rate was achieved at 10:38 AM.
- At 10:15 AM on November 23, we started transferring the accumulated water in Unit 3 Turbine Building basement to the Central Radioactive Waste Treatment Facility (Miscellaneous Solid Waste Volume Reduction Treatment Building [High Temperature Incinerator Building]). At 9:47 AM on December 4, the transfer was stopped.
- At 10:10 AM on December 4, we started transferring the accumulated water in Unit 3 Turbine Building basement to the Central Radioactive Waste Treatment Facility (Process Main Building).
[Fukushima Daini Nuclear Power Station]
· Unit 1 to 4: Shutdown due to the earthquake.
Past Progress (As of 3:00 pm, on December 4, 2012) (PDF 615KB)
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.