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 around 10:16 AM on August 17, a worker from cooperative company on patrol found water leakage at the desalination apparatus (Reverse Osmosis Membrane) 3. The apparatus was stopped manually at 10:17 AM, and at stop of the leakage was confirmed 10:22AM. The leakage location was confirmed to be the joint of the suction side of the booster pump inside skid 3 of the apparatus. We estimated that the leakage amount is approx. 0.2m3, and the leaked water is the water before the process of desalination. The surface radiation dose rate was 0.1mSv/h (γ rays) and 3mSv/h (β rays). The water leak has occurred inside the dam and has not flooded out.
-On August 16, a worker of a cooperative company who was operating a crane in the multi-nuclide removal equipment installation was taking a break (after finishing work and changing) in the rest area of the Cooperative Operation Company Center Welfare Building with his belongings (worker's ID, a dosimeter and a pocket dosimeter (PD)) left behind. Though another worker who found the belongings handed them back to the worker, the PD was missing. We looked for the PD including workers of TEPCO, however the PD was not yet found. According to the PD lending record, the PD was lent to the worker and it was confirmed that he had the PD on during operation. Since the exposed dose of other workers who did the same work was approx. 0.02 mSv (figure of PD), we estimated that the dose of the worker was the same level. Since the worker also had the dosimeter on during operation, the radiation exposure dose can still be evaluated. Other details are currently being investigated.
[ Fukushima Daini Nuclear Power Station ]
-Unit 1 to 4: Shutdown due to the earthquake.
Appendix:
Past Progress (As of 3:00 pm, on August 17, 2012) (PDF 479KB)
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.
