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 11:33 AM on November 1, an alarm went off at the measurement equipment used to continuously measure the radioactivity density of the air (continuous dust monitor) at Units 5-6 Service Building. In response to the alarm, a direction to put on full-face mask was given according to the full-face mask requirement rule. Based on the results of detailed investigation below, the full-face mask requirement was lifted at 1:05 PM on the same day. At around 12:40 PM on the same day, the alarm of the continuous dust monitor was cancelled. As a result of nuclide analysis of the continuous dust monitor filter paper, no nuclide was detected at the time that the alarm went off. The cause of the alarm going off will be investigated with a possibility of continuous dust monitor failure in mind.
[Investigation performed]
- Monitoring post reading (No. 1-8): No change found
- Radiation dose near the site: 2-3μSv/h
- Nuclide analysis result of the continuous dust monitor filter paper: No nuclide detected
- Current reading on the continuous dust monitor: 2 x 10^-6Bq/cm³
- Measurement result obtained with a portable dust sampler: 2.8×10^-5Bq/cm³ or less

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

Appendix: Past Progress (As of 3:00 pm, on November 1, 2012) (PDF 725KB)
Appendix: 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.