With regard to the accident at Fukushima Daiichi Nuclear Power Station, TEPCO issued a road map in April 2011.
By bringing the reactors and spent fuel pools to a stable cooling condition and mitigating the release of radioactive materials, TEPCO plans to make every effort to enable evacuees to return to their homes and for all citizens to be able to secure a sound life.
Targets are set for each of the five issues and various countermeasures will be implemented simultaneously.
- 1)
- Cooling the Reactors
- 2)
- Cooling the Spent Fuel Pools
- 3)
- Mitigation of Release of Radioactive Materials to Atmosphere and from Soil
- 4)
- Containment, Storage, Processing, and Reuse of Water Contaminated by Radioactive Materials (Accumulated Water)
- 5)
- Measurement, Reduction and Announcement of Radiation Dose in Evacuation Order/Planned Evacuation/Emergency Evacuation Preparation Areas
・ In July 2011, Nuclear Emergency Response Headquarters judged that radiation dose was in steady decline by stable cooling which was the target for Step 1, and confirmed the achievement of STEP 1 targets.
http://www.tepco.co.jp/en/press/corp-com/release/betu11_e/images/110719e3.pdf
・ On December 16, 2011 completion of Step 2 was reported by judging that the reactors were brought to a condition equivalent to “cold shutdown” which was the target of Step 2.
http://www.tepco.co.jp/en/press/corp-com/release/betu11_e/images/111216e3.pdf
Nuclear Emergency Response Headquarters announced the "Mid-and-long-Term Roadmap towards the Decommissioning of Fukushima Daiichi Nuclear Power Units 1-4" on December 21, 2011.
(Mid-and-long-Term Roadmap (Digest Version))
(Primary Targets)
| The roadmap divides the term of decommissioning into the following three phases. | |
| Phase 1: | From the completion of Step 2 to the start of fuel removal from the spent fuel pool. |
| (Target: Accomplish within 2 years after completion of Step 2) | |
| Phase 2: | From the end of Phase 1 to the start of fuel debris removal. |
| (Target: Accomplish within 10 years after complish of Step 2) | |
| Phase 3: | From the end of Phase 2 to the end of decommissioning. |
| (Target: Accomplish within 30 to 40 years after the completion of Step 2) | |
This roadmap was revised on July 30, 2012 by taking into consideration the progress of the work and problems that had occurred or became clear.
(Revised Mid-and-long-Term Roadmap (Digest Version))
On October 22, “Progress Status of the Long-and-mid Term Roadmap towards the Decommissioning of Units 1-4 of TEPCO Fukushima Daiichi Nuclear Power Station” was published.
(Progress Status of the Roadmap)
