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Completion of the 4th Discharge of ALPS Treated Water in FY2025

Commencement of the discharge of ALPS treated water into the sea (4th discharge in FY2025)

Analysis Results of ALPS Treated Water Sampled from the Measurement/Confirmation Facility Tank Group B and the Scheduled Date of the Commencement of the 4th Discharge in FY2025

Completion of the 3rd Discharge of ALPS Treated Water in FY2025

Commencement of the discharge of ALPS treated water into the sea (3rd discharge in FY2025)

Analysis Results of ALPS Treated Water Sampled from the Measurement/Confirmation Facility Tank Group A and the Scheduled Date of the Commencement of the 3rd Discharge in FY2025

Completion of the Second Discharge of ALPS Treated Water in FY2025

Commencement of the discharge of ALPS treated water into the sea (second discharge in FY2025)

Analysis Results of ALPS Treated Water Sampled from the Measurement/Confirmation Facility Tank Group C and the Scheduled Date of the Commencement of the 2nd Discharge in FY2025

Completion of the First Discharge of ALPS Treated Water in FY2025

Commencement of the discharge of ALPS treated water into the sea (first discharge in FY2025)

Analysis Results of ALPS Treated Water Sampled from the Measurement/Confirmation Facility Tank Group A and the Scheduled Date of the Commencement of the First Discharge in FY2025

Completion of the 7th Discharge of ALPS Treated Water in FY2024

Fukushima Daiichi Nuclear Power Station seventh discharge in FY2024
Commencement of the Second stage of the discharge of ALPS treated water into the sea (discharge in two‐stage)

Analysis Results of ALPS Treated Water Sampled from the Measurement/Confirmation Facility Tank Group C and the Scheduled Date of the Commencement of the 7th Discharge in FY2024

Completion of the 6th Discharge of ALPS Treated Water in FY2024

Commencement of the discharge of ALPS treated water into the sea (6th discharge in FY2024)

Analysis Results of ALPS Treated Water Sampled from the Measurement/Confirmation Facility Tank Group B and the Scheduled Date of the Commencement of the 6th Discharge in FY2024

Completion of the 5th Discharge of ALPS Treated Water in FY2024

Commencement of the discharge of ALPS treated water into the sea (5th discharge in FY2024)

Analysis Results of ALPS Treated Water Sampled from the Measurement/Confirmation Facility Tank Group A and the Scheduled Date of the Commencement of the Fifth Discharge in FY2024

Completion of the 4th Discharge of ALPS Treated Water in FY2024

Commencement of the discharge of ALPS treated water into the sea (4th discharge in FY2024)

Analysis Results of ALPS Treated Water Sampled from the Measurement/Confirmation Facility Tank Group C and the Scheduled Date of the Commencement of the Fourth Discharge in FY2024

Results from the FY2023 investigative analysis of the six nuclides targeted for monitoring in contaminated water prior to ALPS treatment

Completion of the Third Discharge of ALPS Treated Water in FY2024

Commencement of the discharge of ALPS treated water into the sea (third discharge in FY2024)

ALPS treated water status update

Analysis Results of ALPS Treated Water Sampled from the Measurement/Confirmation Facility Tank Group B and the Scheduled Date of the Commencement of the Third Discharge in FY2024

Completion of the Second Discharge of ALPS Treated Water in FY2024

ALPS treated water status update

Commencement of the discharge of ALPS treated water into the sea (second discharge in FY2024)

Analysis Results of ALPS Treated Water Sampled from the Measurement/Confirmation Facility Tank Group A and the Scheduled Date of the Commencement of the Second Discharge in FY2024

Completion of the First Discharge of ALPS Treated Water in FY2024

ALPS treated water status update

Commencement of the discharge of ALPS treated water into the sea (first discharge in FY2024)

Analysis Results of ALPS Treated Water Sampled from the Measurement/Confirmation Facility Tank Group C

ALPS Treated Water Discharge Status Update

Completion of the Discharge from Measurement/Confirmation Facility Tank Group B (Fourth Discharge)

ALPS Treated Water Discharge Status Update

Commencement of the fourth discharge for FY2023

Analysis Results of ALPS Treated Water Sampled from the Measurement/Confirmation Facility Tank Group B

Status of Progress of the Marine Organisms Rearing Test

ALPS Treated Water Discharge Status Update

Revision of future monitoring plan for quick tritium measurement

Status of Progress of the Marine Organisms Rearing Test

ALPS Treated Water Discharge Status Update

Status of Progress of the Marine Organisms Rearing Test

ALPS Treated Water Discharge Status Update

Completion of the Discharge from Measurement/Confirmation Facility Tank Group A (Third Discharge)

Commencement of the Second Stage of the third discharge for FY2023

Analysis Results for the Water Stored in the Discharge Vertical Shaft (Upper-stream Storage) as Part of the First Stage of the Third Discharge in FY2023

Commencement of the First Stage of the third discharge for FY2023

Facility inspection results and preparations for the First Stage of the third discharge of FY2023

Status of Progress of the Marine Organisms Rearing

ALPS Treated Water Discharge Status Update

Completion of the Discharge from Measurement/Confirmation Facility Tank Group C (Second Discharge)

Analysis Results of ALPS Treated Water Sampled from the Measurement/Confirmation Facility Tank Group A

Commencement of the Second Stage of the second discharge for FY2023

Analysis Results for the Water Stored in the Discharge Vertical Shaft (Upper-stream Storage) as Part of the First Stage of the Second Discharge in FY2023

Commencement of the First Stage of the second discharge for FY2023

Status of Progress of the Marine Organisms Rearing Test

ALPS Treated Water Discharge Status Update

Analysis Results of ALPS Treated Water Sampled from the Measurement/Confirmation Facility Tank Group C

Addition of quick measurement data from each agency to the website "Overarching Radiation-monitoring data Browsing System (ORBS)"

Completion of the Discharge from Measurement/Confirmation Facility Tank Group B (First Discharge)

Status of Measurement/Confirmation Facility Tank Group B Discharge and Discharge Completion Process

Tritium concentration analysis results from sea area monitoring (within 3km of the power station (near the discharge outlet))

Status of Progress of the Marine Organisms Rearing Test

Tritium concentration analysis results of seawater pipes and sea area monitoring pertaining to ALPS treated water discharge into the sea

Commencement of the Discharge of ALPS Treated Water into the Sea

Commencement of the Initial Discharge of ALPS Treated Water (Stage 2)

Commencement of preparations for the initial discharge of ALPS-treated water (First Stage)

Commencement of the Discharge of Water Treated with Multi-nuclide Removal Equipment (ALPS Treated Water) into the Sea

Status of Progress of the Marine Organisms Rearing Test

ALPS Treated Water Dilution and Discharge Facilities Status and Measures to Ensure Safety

Status of Progress with the Installation of ALPS Treated Water Dilution/Discharge Facility and Related Facilities

Status of Progress of the Marine Organisms Rearing Test

Analysis Results of ALPS Treated Water Sampled from the Measurement/Confirmation Facility at the Fukushima Daiichi Nuclear Power Station

Signing of nondisclosure agreement pertaining to feasibility study on technology for separating tritium from ALPS treated water, etc. (the period 2 and 3) and other announcement

Status of Progress with the Installation of ALPS Treated Water Dilution/Discharge Facility and Related Facilities

Status of Progress of the Marine Organisms Rearing Test

Setting Index (Discharge suspension level) and Other Measures in Sea Area Monitoring regarding the Discharge of ALPS Treated Water into the Sea

Status of Progress of the installation of ALPS treated water dilution/discharge facility and related facilities

Status of Progress of the Marine Organisms Rearing Test

Partial Revision of the "Application Documents for Approval to Amend the Implementation Plan for Fukushima Daiichi Nuclear Power Station Specified Nuclear Facility" Regarding the Handling of ALPS Treated Water

Status of Progress of the Marine Organisms Rearing Test

Status of Progress of the installation of ALPS treated water dilution/discharge facility and related facilities

Sampling from the measurement/confirmation facility that is part of ALPS treated water dilution/discharge facility in the Fukushima Daiichi Nuclear Power Station

Completion of pre-use inspections of ALPS treated water dilution/discharge facility measurement/confirmation facility at the Fukushima Daiichi Nuclear Power Station and commencement to operate circulation/agitation equipment

Launching of Overarching Radiation-monitoring data Browsing System (ORBS)

Signing of nondisclosure agreement pertaining to feasibility study on technology for separating tritium from ALPS treated water, etc.

Status of Progress of the Marine Organisms Rearing Test

Status of Progress of the installation of ALPS treated water dilution/discharge facility and related facilities

Partial Revision of the "Application Documents for Approval to Amend the Implementation Plan for Fukushima Daiichi Nuclear Power Station Specified Nuclear Facility" Regarding the Handling of ALPS Treated Water

*Radiological Environmental Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Construction stage) (From 264 page)

Partial Revisions of the "Application Documents for Approval to Amend the Implementation Plan for Fukushima Daiichi Nuclear Power Station Specified Nuclear Facility" Regarding the Handling of ALPS Treated Water

*Radiological Environmental Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Construction stage) (From 272 page)

Status of Progress of the installation of ALPS treated water dilution/discharge facility and related facilities

Status of Sea Area Monitoring for the Handling of ALPS Treated Water

Status of Progress of the installation of ALPS treated water dilution/discharge facility and related facilities

Examining the tritium analysis values of fish during sea area monitoring in preparation for the discharge of ALPS treated water into the sea

Announcement regarding the installation work of Fukushima Daiichi Nuclear Power Station ALPS treated water dilution/discharge facility and related facilities

Installation of Discharge Outlet Caisson

Submission of the "Application Documents for Approval to Amend the Implementation Plan for Fukushima Daiichi Nuclear Power Station Specified Nuclear Facility" Regarding the Handling of ALPS Treated Water
*Including "Attachment 3 : Radiological Environmental Impact Assessment Regarding the Discharge of ALPS Treated Water into the Sea (Construction stage)"

*Radiological Environmental Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Construction stage) (From 218 page)

Status of Progress of the installation of ALPS treated water dilution/discharge facility and related facilities

Start of the Marine Organisms Rearing Tests

Progress in preparations for the marine organisms rearing test

Installation of ALPS Treated Water Dilution/Discharge Facility and Related Facilities Given the Approval of the Amendment of the Implementation Plan and the Prior Consent based on the Agreement to Ensure Safety in Decommissioning

Progress in the marine organisms rearing test (Start of rearing practice in the mockup tanks)

Partial Revision (third revision) of the "Application Documents for Approval to Amend the Implementation Plan for Fukushima Daiichi Nuclear Power Station Specified Nuclear Facility" Regarding the Handling of ALPS Treated Water

*Radiological Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Design stage / Revised version) (From 241 page)

Progress in preparations for the marine organisms rearing test

Secondary assessment of proposals from Period 2 and primary assessment of proposals from Period 3 on technology for separating tritium from ALPS treated water, etc.

(Report) Improvements in the Surroundings of ALPS Treated Water Dilution/Discharge Facilities at the Fukushima Daiichi Nuclear Power Station

Status of Sea Area Monitoring for the Handling of ALPS Treated Water

Partial Revision (second revision) of the "Application Documents for Approval to Amend the Implementation Plan for Fukushima Daiichi Nuclear Power Station Specified Nuclear Facility" Regarding the Handling of ALPS Treated Water

*Radiological Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Design stage / Revised version)

Revision of the "Application Documents for Approval to Amend the Implementation Plan for Fukushima Daiichi Nuclear Power Station Specified Nuclear Facility" Regarding the Handling of ALPS Treated Water