ALPS Treated Water

The Advanced Liquid Processing System (ALPS), a multi-nuclide removal system, removes various radioactive materials from contaminated water.

• Q&A
  of ALPS treated water

• Fukushima-Daiichi
  Treated Water Discharge
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  ALPS treated water

Outline of ALPS treated water

Basic Policy

• Basic Policy on handling of ALPS treated water at the Tokyo Electric Power Company Holdings’ Fukushima Daiichi Nuclear Power Station (April 13, 2021)(PDF:347KB)

Related Documents

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  What is “ALPS treated water”? (PDF:1.28MB)

  English (PDF:1.28MB)

  Korean (PDF:846KB)

  Simplified Chinese (PDF:684KB)

  Traditional Chinese (Hong Kong) (PDF:973KB)

  Traditional Chinese (Taiwan)

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  The radiological impact on the public and the environment (PDF:321KB)

  English (PDF:321KB)

  Korean (PDF:496KB)

  Simplified Chinese (PDF:1,421KB)

  Traditional Chinese (PDF:580KB)

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  Leaflet on the ALPS treated water (PDF:667KB)

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  Ensuring Safety of ALPS treated water discharged into the sea (PDF:1.3MB)

International Atomic Energy Agency (IAEA)

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• 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)
• The IAEA Published a Report for “Corroboration of External Exposure Monitoring” for 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)
• Minister Saito Holds Meeting with H.E. Mr. Rafael Mariano Grossi, Director General of the International Atomic Energy Agency (IAEA) (March 12, 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)
• State Minister Sakai Attends the 67th General Conference of the International Atomic Energy Agency (IAEA) (September 27, 2023)
• Minister Nishimura Holds a Video Conference with H.E. Mr. Rafael Mariano Grossi, Director General of the IAEA (August 25, 2023)
• Minister Nishimura Holds a Conference with H.E. Mr. Rafael Mariano Grossi, Director General of the IAEA (July 4, 2023)
• Publication of the IAEA Comprehensive Report on the Safety Review of the ALPS Treated Water at the TEPCO’s Fukushima Daiichi nuclear Power Station (July 4, 2023)
• IAEA Officials and International Experts to Visit Japan on a Comprehensive Mission to Review the Discharge of ALPS Treated Water from TEPCO’s- Fukushima Daiichi Nuclear Power Station into the sea (May 26, 2023)
• Minister Nishimura Holds a Video Conference with H.E. Mr. Rafael Mariano Grossi, Director General of the IAEA (April 20, 2023)
• 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 in November 2022 (April 6, 2023)
• The IAEA Published a Report on "IAEA’s Independent Sampling, Data Corroboration, and Analysis Activities" from Its Review of Safety Related Aspects of Handling ALPS Treated Water at TEPCO's Fukushima Daiichi Nuclear Power Station (January ４, 2023)
• Minister Hagiuda Holds Meeting with H.E. Mr. Rafael Mariano Grossi, Director General of the IAEA (May 18, 2022)
• The IAEA Published a Report on Its February Review Mission of Safety Aspects of Handling of ALPS Treated Water (April 29, 2022)
• The IAEA Conducted Its Review Mission of Safety Aspects of Handling of ALPS Treated Water at Fukushima Daiichi Nuclear Power Station (February 18, 2022)
• Minister Hagiuda Holds a Video Conference with H.E. Mr. Rafael Mariano Grossi, Director General of the International Atomic Energy Agency (IAEA) (December 10, 2021)
• IAEA and Japan held a preparatory meeting for the review on the safety of ALPS treated water at the Fukushima Daiichi Nuclear Power Station (November 19, 2021)
• IAEA Holds First Meeting of International Task Force Set Up to Review Safety of Fukushima Treated Water Release (September 28, 2021)
• IAEA senior officials came to Japan and had a discussion toward the full-scale implementation of the review on the safety of ALPS treated water at the Fukushima Daiichi Nuclear Power Station (September 9, 2021)
• The Government of Japan signed on IAEA's support for handling of ALPS treated water at TEPCO's Fukushima Daiichi Nuclear Power Station (July 8, 2021)

Status of studies on the handling of ALPS treated water

Related Documents

• Outline of Government Budget Proposals of Ministries and Agencies in Response to the Action Plan (December 28, 2021)(PDF:173KB)

The Inter-Ministerial Council concerning the Continuous Implementation of the Basic Policy on Handling of ALPS Treated Water

• Action Plan for the Continuous Implementation of the Basic Policy on Handling of ALPS Treated Water（August 2023）(PDF:2,442KB)
• Actions and future measures regarding Basic Policy (outline) (August 22, 2023)(PDF:318KB)
• Actions and future measures regarding “Basic Policy on handling of ALPS treated water at the Tokyo Electric Power Company Holdings’ Fukushima Daiichi Nuclear Power Station” (August 22, 2023)(PDF:238KB)
• Action Plan for the Continuous Implementation of the Basic Policy on Handling of ALPS Treated Water (August 30, 2022)(PDF:509KB)
• Concept to strengthen and expand measures on handling of ALPS treated water at TEPCO’s Fukushima Daiichi Nuclear Power Station (August 30, 2022)(PDF:247KB)

 

Team for Contaminated Water and Decommissioning Issues

• The Outline of the opinions for ALPS treated water (PDF:293KB)

The Subcommittee on Handling ALPS treated water

• The Subcommittee on Handling of the ALPS treated water Report（February 10, 2020）(PDF:2,246KB)
• The Outline of the report of the Subcommittee on handling of ALPS treated water (February 10, 2020）(PDF:1,743KB)

 

Tritiated Water Task Force (2013-2016)

• Tritiated Water Task Force Report (June 2016, Tritiated Water Task Force) (September 15, 2016)(PDF:0KB)

ALPS treated water Q&A

Here, we will answer the questions of ALPS treated water.
If you have questions, please check the answer!

＜“treated water” and “contaminated water”＞
Q1: What is “ALPS treated water”?
Q2: Why is “contaminated water” generated?

＜Characteristics of the ALPS treated water＞
Q3: What is tritium?
Q4: Can tritium be removed?
Q5: Does the treated water contain radioactive materials other than tritium?

＜Handling of the ALPS treated water＞
Q6: Why is discharge of ALPS treated water needed?
Q7: Why was Discharge into the sea selected as the method of disposal?
Q8: Is it possible to store or discharge treated water outside of Fukushima Daiichi NPS (FDNPS)？
Q9: Is it possible to store in intermediate storage facilities?

 

＜Radiation impact of ALPS treated water＞
Q10: What regulatory standards are applicable to the discharge from Fukushima Daiichi NPS (FDNPS)？
Q11: What level of radioactive impact will the release of the treated water have?

 

＜Countermeasures for possible reputational damage＞
Q12: What kind of countermeasures will be taken for possible reputational damage?

＜Future plans＞
Q13: What are the steps toward handling of treated water?

Related Articles and Videos

【Articles】

Reuters

• Japan’s challenges and initiatives in discharging Fukushima water
• The science and global standards behind Fukushima’s ALPS treated water

The Wall Street Journal

• The Future of Fukushima

New Scientist

• Fukushima: the inside story of the ALPS treated water

South China Morning Post

• 5 things you may not know about Fukushima, 12 years after the nuclear accident

【Videos】

Euronews

MOFA

ANRE Special Contents - article on ALPS treated water -

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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
• MOE: ALPS Treated Water Marine Monitoring Information

Division in Charge

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