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 12, we sampled the accumulated water of PCV from one of the penetration holes of Unit 1 PCV (X-100B penetration), and analyzed the water. The results of the analysis were as follows.
Iodine: Below the detection limit
Cesium 134: 1.9 x 104 Bq/cm3
Cesium 137: 3.5 x 104 Bq/cm3
-From 9:30 AM to 11:30 AM on October 13, we installed a permanent monitoring meter (thermometer, water gauge) from one of the penetration holes of Unit 1 PCV (X-100B penetration) to the inside of PCV. We checked its functionality and the output data, and confirmed that there was no problem. The measured data by the permanent monitoring meter were as follows (as of 1:00 PM).
Water level of PCV: Approx. 2.4m - 3.2m from the floor of the dry well (provisional)
Atmosphere temperature: Approx. 34.1°C - 35.1°C
Accumulated water temperature: Approx. 37.0°C - 37.4°C
The measured data of the existing temperature at the same time was Approx. 34.4°C - 41.5°C, there is little difference between the existing temperature and the thermometer installed this time. We will continuously monitor the data of the permanent thermometer.
[ Fukushima Daini Nuclear Power Station ]
･ Unit 1 to 4: Shutdown due to the earthquake.
Past Progress (As of 3:00 pm, on October 13, 2012) (PDF 558KB)
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.