Mid-and-Long-Term Roadmap towards the Decommissioning of TEPCO's Fukushima Daiichi Nuclear Power Station Units 1-4

• What's New
• Special Page explaining ALPS Treated Water
• Current Status of Fukushima Daiichi NPS
• The Mid-and-Long term Roadmap
• International Atomic Energy Agency (IAEA)
• Countermeasures to Manage Contaminated Water
• Environmental Monitoring
• Efforts made for decommissioning
• Detailed analysis results regarding the water quality of the groundwater being pumped out for by-passing and by sub-drains at Fukushima Daiichi NPS
• Progress Status of Fukushima Daiichi NPS (monthly)
• ANRE Special Contents – article on Fukushima Daiichi NPS
• Related Links

What's New

Special Page explaining ALPS Treated Water

Current Status of Fukushima Daiichi NPS

• Brochure: Important Stories on Decommissioning - Decommissioning of TEPCO's Fukushima Daiichi NPS and the Discharge of ALPS Treated Water into the Sea - (PDF:4,575KB)

• Summary of Fukushima Daiichi NPS(PDF:1,571KB)
• Monthly progress (including seawater monitoring, fuel removal etc.) (PDF:0KB)

Videos: １F FACT

• 1F FACT 01：Discharging ALPS treated water into the sea
  
  Simplified Chinese version
  
  Korean version
• 1F FACT 02：Retrieval of fuel debris
  
  Simplified Chinese version
  
  Korean version
• 1F FACT 03: The current state of the Fukushima Daiichi
  
  Simplified Chinese version
  
  Korean version

The Mid-and-Long term Roadmap

• Outline of the 5th Revision: “the Mid-and-Long term Roadmap” (December 27, 2019) (PDF:1,014KB)
• The 5th Revision: “the Mid-and-Long term Roadmap” (December 27, 2019)(PDF:1,160KB)

International Atomic Energy Agency（IAEA）

• As a Part of Additional Measures under the IAEA Framework, ALPS Treated Water Diluted with Seawater was Sampled on the Premises of TEPCO’s FDNPS for the First Time (Apr 15, 2025)
• The IAEA Published a Report on its Third Review Mission of Safety Related Aspects of the Discharge of ALPS Treated Water into the Sea after the Start of the Discharge (March 25, 2025)
• The IAEA Published a Report on the Third Interlaboratory Comparison on the Determination of Radionuclides in ALPS Treated Water (March 25, 2025)
• The IAEA Published a Report on “Corroboration of Internal Exposure Monitoring” for Workers as Part of the Review of Safety Related Aspects of Handling ALPS Treated Water (March 25, 2025)
• As a Part of Additional Measures under the IAEA Framework, ALPS Treated Water was Sampled on the Premises of TEPCO’s FDNPS for the First Time (February 21, 2025)
• Minister Muto Holds Meeting with IAEA Director General Grossi (February 20, 2025)
• The IAEA Conducted a Review Mission on the Safety of the Discharge of ALPS Treated Water (December 13, 2024)
• Workers as Part of the Review of Safety Related Aspects of Handling ALPS Treated Water (November 12, 2024)
• Reconstruction and Decommissioning in Fukushima- Side Event of IAEA General Conference 2024 (September 17, 2024)
• The IAEA Published a Report on Its Second Review Mission of Safety Aspects of Handling of ALPS Treated Water at Fukushima Daiichi Nuclear Power Station since the Start of the Discharge in April 2024（July 18, 2024）
• IAEA Officials and International Experts to Visit Japan for the Review on the Safety of the Discharge of ALPS Treated Water from TEPCO’s Fukushima Daiichi Nuclear Power Station into the Sea (April 12, 2024)
• Minister Saito Holds Meeting with H.E. Mr. Rafael Mariano Grossi, Director General of the International Atomic Energy Agency (IAEA)（March 28, 2024）
• IAEA Officials will Visit TEPCO’s Fukushima Daiichi Nuclear Power Station to Observe Sampling of the ALPS Treated Water for Analysis（February 28, 2024）
• The IAEA Published a Report on Its First Review Mission of Safety Aspects of Handling of ALPS Treated Water at Fukushima Daiichi Nuclear Power Station since the Start of the Discharge in October 2023（January 30, 2024）
• The IAEA Published Results for Second Interlaboratory Comparison on the Determination of Radionuclides in ALPS Treated Water（January 30, 2024）
• The IAEA Conducted a Review Mission Regarding the Safety of the Discharge of ALPS Treated Water from TEPCO’ Fukushima s Daiichi Nuclear Power Station into the Sea（October 27, 2023）
• State Minister Iwata Holds a Conference with Ms. Lydie Evrard, Deputy Director General of the International Atomic Energy Agency (IAEA)（October 19, 2023）
• Reconstruction and Decommissioning in Fukushima- Side Event of IAEA General Conference 2023 (September 26, 2023)
• Minister Nishimura Holds a Video Conference with H.E. Mr. Rafael Mariano Grossi, Director General of the International Atomic Energy Agency (IAEA)（August 25,2023）
• Minister Nishimura Holds a Conference with H.E. Mr. Rafael Mariano Grossi, Director General of the International Atomic Energy Agency (IAEA)（July 4, 2023）
• Minister Nishimura Holds a Video Conference with H.E. Mr. Rafael Mariano Grossi, Director General of the International Atomic Agency (IAEA)（April 20, 2023）
• Minister Hagiuda Holds Meeting with H.E. Mr. Rafael Mariano Grossi, Director General of the IAEA (May 18, 2022)
• Minister Hagiuda Holds a Video Conference with H.E. Mr. Rafael Mariano Grossi, Director General of the IAEA (December 10, 2021)
• IAEA’s evaluation on “Events and highlights on the progress related to recovery operations at TEPCO’s Fukushima Daiichi NPS”
• Report in the discharge record and the seawater monitoring results at Fukushima Daiichi NPS

IAEA review mission

The 5th review mission (June 30- Aug 27, 2021)

• Report of the 5th review mission(PDF:1,375KB)
• (Japanese ver.) Report of the 5th review mission(PDF:504KB)

Reconstruction and Decommissioning in Fukushima- Side Event of IAEA General Conference 2024 (September 17, 2024)

From September 16 (Mon.) to 20 (Fri.), 2024, the 68th General Conference of the International Atomic Energy Agency (IAEA) held in Vienna, Austria, and also held a side event titled “Reconstruction and Decommissioning in Fukushima” hosted by the Ministry of Economy, Trade and Industry (METI).
The presentation documents are attached below.

• Leaflet of Side Event(PDF:111KB)
• 1. Overview of Decommissioning process and Fukushima reconstruction (METI)(PDF:3,271KB)
• 2. Current status of the decommissioning at FDNPS (TEPCO)(PDF:3,246KB)
• 3. Strategic Plan of Fuel Debris Retrieval Method for the Decommissioning of the Fukushima Daiichi NPS (NDF)(PDF:1,791KB)
• 4. Progress in Off-site Environmental Remediation in Japan (MOE)
• 5. IAEA activities relating to the discharge of ALPS treated water (IAEA)

Countermeasures to Manage Contaminated Water

Water for cooling fuel debris touches that debris, and thereby becomes highly contaminated water containing highly concentrated radioactive materials.

New contaminated water is generated due to mixing of this highly contaminated water with groundwater and rainwater that flow into buildings.

Environmental Monitoring

• Observation data, Fukushima Daiichi NPS (TEPCO)
• Monitoring information of environmental radioactivity levels (NRA)
• Environmental Radiation Monitoring Data Search Site (NRA)
• Radiation levels in the prefecture (Fukushima Prefecture)

Efforts made for decommissioning

What is decommissioning of the Fukushima Daiichi Nuclear Power Station?

Efforts are focused primarily on the following 4 types of work.

Decommissioning will be carried out safely and steadily over 30 to 40 years

Current situation at each unit

Detailed analysis results regarding the water quality of the groundwater being pumped out for by-passing and by sub-drains at Fukushima Daiichi NPS

• Water quality of the pumped up groundwater and sub-drains (March 2025)(PDF:200KB)
• Water quality of the pumped up groundwater and sub-drains (February 2025)(PDF:215KB)
• Water quality of the pumped up groundwater and sub-drains (January 2025)(PDF:211KB)
• Water quality of the pumped up groundwater and sub-drains (December 2024)(PDF:235KB)
• Water quality of the pumped up groundwater and sub-drains (November 2024)(PDF:249KB)

Progress Status of Fukushima Daiichi NPS (monthly)

• February 27, 2025(PDF:9,698KB)
• January 30, 2025(PDF:9,026KB)
• December 26, 2024(PDF:8,845KB)
• November 28, 2024(PDF:8,861KB)
• October 31, 2024(PDF:9,060KB)

ANRE Special Contents – article on Fukushima Daiichi NPS-

• The challenge of retrieving “fuel debris” Article No.3: The frontier of technological development (February 28, 2020)
• The challenge of retrieving “fuel debris” Article No.2: What obstacles will we face? (February 21, 2020)
• The challenge of retrieving “fuel debris” Article No.1: What is fuel debris? (February 14, 2020)
• Fight against contaminated water: The generation of contaminated water steadily reduced to about one-third (August 8, 2019)

Related Links

• TEPCO: Tokyo Electric Power Company
• TEPCO:TREATED WATER POTAL SITE
• NDF: Nuclear Damage Compensation and Decomissioning Facilitation Corporation
• NRA: Nuclear Regulation Authority
• MAFF: Ministry of Agriculture, Forestry and Fisheries
• Fukushima Prefecture: Food monitoring site
• IRID: International Research Institute for Nuclear Decommissioning
• JAEA: Japan Atomic Energy Agency
• IAEA: Fukushima Daiichi Status Updates

Division in Charge

Nuclear Accident Response Office, Electricity and Gas Industry Department, Agency for Natural Resources and Energy