Information | Tokyo Electric Power Company Holdings, Incorporated

2024.12.17: Prime Minister, Shigeru Ishiba's Visit to Fukushima Daiichi Nuclear Power Station (2024.12.14)
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2024.12.13: Site Visit to the Fukushima Daiichi Nuclear Power Station by the IAEA Task Force to conduct a safety review mission regarding the discharge of ALPS treated water (Third Review Mission after the Start of the Discharge) (2024.12.11)
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2024.12.9: Release of Radiological Environmental Impact Assessment Report for One Year after the Commencement of Discharge Regarding the Discharge of ALPS Treated Water into the Sea (Operation stage)
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2024.11.5: “Completion of the Discharge from Measurement/Confirmation Facility Tank Group B (6th Discharge for FY2024)" was disclosed.
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2024.10.30: Governor of Fukushima Prefecture, Masao Uchibori's Visit to Fukushima Daiichi Nuclear Power Station (2024.10.29)
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2024.10.17: Commencement of the 6th discharge in FY2024
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2024.10.15: “Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group B" was disclosed.
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2024.10.15: “Completion of the Discharge from Measurement/Confirmation Facility Tank Group A (5th Discharge for FY2024)" was disclosed.
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2024.10.10: Minister of Economy, Trade and Industry, Yoji Muto's Visit to Fukushima Daiichi Nuclear Power Station (2024.10.5)
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2024.9.30: Ambassador of the Republic of Korea visited Fukushima Daiichi Nuclear Power Station (2024.9.26)
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2024.9.26: Commencement of the 5th discharge in FY2024
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2024.9.24: “Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group A" was disclosed.
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2024.9.3: The leaflet “Overview of the IAEA Report on Its Review of Safety Related Aspects of Handling ALPS Treated Water at Fukushima Daiichi Nuclear Power Station (Second Review Mission after the Start of the Discharge)” was released.
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2024.8.26: “Completion of the Discharge from Measurement/Confirmation Facility Tank Group C (4th Discharge for FY2024)" was disclosed.
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2024.8.23: Summary and review of one year of initiatives in the discharge of ALPS treated water into the sea
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2024.8.7: Commencement of the 4th discharge in FY2024
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2024.8.5: “Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group C" was disclosed.
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2024.8.1: Results from the FY2023 investigative analysis of the six nuclides targeted for monitoring in contaminated water prior to ALPS treatment
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2024.7.19: IAEA Confirms Tritium Level in Seawater from Kitaizumi Beach Far Below Japan’s Limit (2024.7.9)
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2024.7.18: Release of Report from the International Atomic Energy Agency's (IAEA) Review of Safety Related Aspects of Handling ALPS Treated Water at Fukushima Daiichi Nuclear Power Station(Second Review Mission after the Start of ALPS Treated Water Discharge)
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2024.7.16: “Completion of the Discharge from Measurement/Confirmation Facility Tank Group B (Third Discharge for FY2024)" was disclosed.
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2024.6.28: Commencement of the third discharge in FY2024
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2024.6.27: ALPS Treated Water Discharge Status Update
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2024.6.26: “Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group B" was disclosed.
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2024.6.14: Visit to Fukushima Daiichi Nuclear Power Station by the Ambassador of France to Japan, H. E. Mr. Philippe Setton (2024.6.7)
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2024.6.12: Q&A is updated.
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2024.6.4: “Completion of the Discharge from Measurement/Confirmation Facility Tank Group A (Second Discharge for FY2024)" was disclosed.
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2024.5.30: ALPS Treated Water Discharge Status Update
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2024.5.20: Press Conference for Overseas Media (Sixth) regarding decommissioning work at the Fukushima Daiichi Nuclear Power Station was held.　(2024.5.20)
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2024.5.17: Commencement of the second discharge in FY2024
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2024.5.15: “Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group A" was disclosed.
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2024.5.7: “Completion of the Discharge from Measurement/Confirmation Facility Tank Group C (First Discharge for FY2024)" was disclosed.
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2024.4.25: ALPS Treated Water Discharge Status Update
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2024.4.25: Site Visit to the Fukushima Daiichi Nuclear Power Station by the IAEA Task Force to conduct a safety review mission regarding the discharge of ALPS treated water (2024.4.24)
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2024.4.24: At 5:16 p.m. on April 24, we recommenced the discharge of ALPS treated water into the sea that had been suspended in conjunction with a loss of the on-site power system A, which occurred at 10:43 a.m. on the same day.
We have confirmed that there are no abnormalities with the facility’s operation.
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2024.4.19: Commencement of the first discharge in FY2024
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2024.4.17: “Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group C" was disclosed.
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2024.4.15: Visit to the Fukushima Daiichi Nuclear Power Station by the representatives of World Association of Nuclear Operators (WANO) (2024.4.12)
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2024.4.11: Visit to Fukushima Daiichi Nuclear Power Station by the Ambassador of Canada to Japan, H. E. Mr. Ian G. McKay (2024.4.8)
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2024.3.18: "Completion of the Discharge from Measurement/Confirmation Facility Tank Group B (Fourth Discharge)" was disclosed.
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2024.3.15: At around 12:14 a.m. on March 15, an earthquake with its epicenter off the coast of Fukushima Prefecture in Japan occurred. The seismic intensity of 5-lower, that is the operational criteria to suspend the operation of the ALPS treated water dilution/discharge facility, was measured in Naraha Town, one of the towns^* where our power stations are located.
In response to this situation, we suspended the operation of the ALPS treated water dilution/discharge facility at 12:33 a.m., in accordance with the pre-defined operational procedures.

After conducting field patrol inspections, we confirmed that there was no abnormality on our facilities and related parameters, and that no leakage alarms had activated.
At 3:49 p.m., we commenced the ALPS treated water transfer process, and resumed the discharge into the sea.

*Fukushima Daiichi Nuclear Power Station is located in Okuma Town and Futaba Town. Fukushima Daini Nuclear Power Station is located in Tomioka Town and Naraha Town.
2024.3.14: IAEA Director General Rafael Mariano Grossi’s visit to the Fukushima Daiichi Nuclear Power Station (2024.3.13)
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2024.3.1: The leaflet “Overview of the IAEA Report on Its Review of Safety Related Aspects of Handling ALPS Treated Water at Fukushima Daiichi Nuclear Power Station (First Review Mission after the Start of the Discharge)” was released.
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2024.2.29: ALPS Treated Water Discharge Status Update
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2024.2.28: Commencement of the fourth discharge for FY2023
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2024.2.26: “Pre-discharge analysis results of ALPS treated water in the　measurement/confirmation facility tank group B" was disclosed.
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2024.2.22: Primary Evaluation of 7th Open Call for Tritium Separation Technology
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2024.2.19: Visit to the Fukushima Daiichi Nuclear Power Station by the Ambassadors of the IAEA board member states to Vienna (2024.2.14)
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2024.1.31: Release of Report from the International Atomic Energy Agency's (IAEA) Review of Safety Related Aspects of Handling ALPS Treated Water at Fukushima Daiichi Nuclear Power Station(First Review Mission after the Start of ALPS Treated Water Discharge)
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2024.1.25: ALPS Treated Water Discharge Status Update
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2024.1.17: Press Conference for Overseas Media (Fifth) regarding decommissioning work at the Fukushima Daiichi Nuclear Power Station was held. (2024.1.16)
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2024.1.12: “Overarching Radiation-monitoring data Browsing System in the coastal ocean of Japan” has been revamped.
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2023.12.26: ’Safety review by the IAEA’ is released.
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2023.12.25: Revision of future monitoring plan for quick tritium measurements
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2023.12.22: Video using computer graphics "Overview of discharge facility" was released.
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2023.12.21: ALPS Treated Water Discharge Status Update
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2023.12.11: Videos introducing "Treated Water Portal Site" were released.
Introduction of "Treated Water Portal Site"
Introduction of "Treated Water Portal Site" -Measurement/Confirmation Facility Conditions-
Introduction of "Treated Water Portal Site" -Dilution/Discharge Facility Conditions-
Introduction of "Treated Water Portal Site" -Sea Area Monitoring Results-
2023.11.30: ALPS Treated Water Discharge Status Update
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For discharge plan and history
2023.11.29: Q&A is updated
2023.11.29: Video using computer graphics "Overview of transfer/dilution facility" was released.
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2023.11.21: Visit to the Fukushima Daiichi Nuclear Power Station by the Ambassador of Czech Republic to H.E. Mr. Martin Klucar. (2023.11.20)
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2023.11.20: "Completion of the Discharge from Measurement/Confirmation Facility Tank Group A (Third Discharge)" was disclosed.
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2023.11.20: Secondary Evaluation of 6th Open Call for Tritium Separation Technology
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2023.11.17: Visit to the Fukushima Daiichi Nuclear Power Station by the Ambassador of Ireland to Japan, H.E. Mr. Damien Cole (2023.11.8)
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2023.11.9: Visit to the Fukushima Daiichi Nuclear Power Station by the International Commission on Radiological Protection (ICRP) (2023.11.2)
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2023.11.2: Commencement of the Second Stage of the third discharge for FY2023
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2023.11.1: 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
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2023.10.31: Commencement of the First Stage of the third discharge for FY2023
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2023.10.30: Facility inspection results and preparations for the First Stage of the third discharge of FY2023
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2023.10.30: Summary of the Press Conference for Overseas Media (Fourth) which was held and disclosed on our website on October 4, 2023 is uploaded.
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2023.10.26: ALPS Treated Water Discharge Status Update
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For discharge plan and history
2023.10.25: Site visit to the Fukushima Daiichi Nuclear Power Station by the IAEA Task Force to conduct a review mission regarding the discharge of ALPS treated water
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2023.10.23: "Completion of the Discharge from Measurement/Confirmation Facility Tank Group C (Second Discharge)" was disclosed.
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2023.10.20: Visit to the Fukushima Daiichi Nuclear Power Station by IAEA Deputy Director General Lydie Evrard.
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2023.10.19: "Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group A" was disclosed.
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2023.10.12: International Atomic Energy Agency (IAEA) attended the sampling for the second discharge of ALPS treated water (Second Stage) (2023.10.5)
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2023.10.12: International Atomic Energy Agency (IAEA) attended the sampling for the second discharge of ALPS treated water (First Stage) (2023.10.3)
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2023.10.4: Press Conference for Overseas Media (Fourth) was held.
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2023.9.28: ALPS Treated Water Discharge Status Update
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2023.9.22: TEPCO Shorts ALPS treated water #10 “What will we demonstrate by marine organisms rearing test?”
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2023.9.21: Analysis Results of ALPS Treated Water Sampled from the Measurement/Confirmation Facility Tank Group C
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2023.9.14: Primary Evaluation of 6th Open Call for Tritium Separation Technology
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2023.9.11: Completion of the Discharge from Measurement/Confirmation Facility Tank Group B (First Discharge)
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2023.9.11: TEPCO Shorts ALPS treated water #09 “Would there be an impact on the public and the environment?”
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2023.9.1: Tritium concentration analysis results from sea area monitoring (within 3km of the power station (near the discharge outlet))
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2023.8.25: Tritium concentration analysis results of seawater pipes and sea area monitoring pertaining to ALPS treated water discharge into the sea
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2023.8.24: Commencement of the Discharge of ALPS Treated Water into the Sea
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2023.8.24: Commencement of the Initial Discharge of ALPS Treated Water (Stage 2)
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2023.8.24: Treated Water Portal Site has been revamped
2023.8.23: Commencement of preparations for the initial discharge of ALPS-treated water (First Stage)
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2023.8.22: Sea Area Monitoring Plan (revised in August, 2023)
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2023.8.22: Commencement of the Discharge of Water Treated with Multi-nuclide Removal Equipment (ALPS Treated Water) into the Sea
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2023.8.22: Remarks about the sixth meeting of the Inter-Ministerial Council concerning the Continuous Implementation of the Basic Policy on Handling of ALPS Treated Water
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2023.8.21: Visit to the Fukushima Daiichi Nuclear Power Station by the Prime Minister Fumio Kishida (2023.8.20)
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2023.7.21: Summary of the Third Press Conference for Overseas Media held on July 21, 2023 is uploaded.
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2023.7.7: Certificate of Completion Received for the Pre-Use Inspections of ALPS Treated Water Dilution/Discharge Facility and Related Facilities at the Fukushima Daiichi Nuclear Power Station
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2023.7.6: IAEA Director General Rafael Mariano Grossi’s visit to the Fukushima Daiichi Nuclear Power Station (2023.7.5)
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2023.7.4: Release of Comprehensive Report on the International Atomic Energy Agency’s safety review of the ALPS Treated Water
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2023.6.26: Work in removal of the shield arrival tube and installation of the discharge outlet caisson upper lid
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2023.6.23: Visit to Fukushima Daiichi Nuclear Power Station by the Ambassador of the Republic of the Marshall Islands to Japan, H. E. Mr. Alexander Carter BING (2023.6.19)
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2023.6.19: Visit to the Fukushima Daiichi Nuclear Power Station by the Delegation of Taiwanese Nuclear Experts (2023.6.16)
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2023.6.16: Pamphlet "Marine Organisms Rearing Test using ALPS Treated Water" was published
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2023.6.13: Visit to the Fukushima Daiichi Nuclear Power Station by the President of the Republic of Palau, H.E. Mr. Surangel S. WHIPPS, Jr. (2023.6.13)
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2023.6.13: Site visit to the Fukushima Daiichi Nuclear Power Station by IAEA officials to observe pre-service inspections of the facilities related to the discharge of ALPS treated water into the sea (2023.5.24 and 25)
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2023.6.9: Visit to the Fukushima Daiichi Nuclear Power Station by the Ambassador of the Dominican Republic to Japan, H. E. Mr. Robert TAKATA (2023.5.31)
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2023.6.6: Down-stream storage after completion of water filling
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2023.6.2: Site visit to the Fukushima Daiichi Nuclear Power Station by the IAEA Task Force to conduct a comprehensive review mission regarding the planned discharge of ALPS treated water (2023.6.2)
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2023.5.30: Pamphlet "Report of Assessment of Radiological Impact on Public and Environment Regarding the Discharge of ALPS Treated Water into the Sea (Construction stage)" (as of May 2023) in below four languages were revised
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2023.5.22: Pamphlet "Report of Assessment of Radiological Impact on Public and Environment Regarding the Discharge of ALPS Treated Water into the Sea (Construction stage)" (as of May 2023) was revised
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2023.5.10: Approval of the Application for Approval to Amend the Implementation Plan Regarding the Handling of ALPS Treated Water at Fukushima Daiichi Nuclear Power Station by the Nuclear Regulation Authority
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2023.4.28: A special page for ALPS treated water launched
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2023.4.24: 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
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2023.4.3: "Overall view of ALPS Treated Water Dilution/Discharge Facility (Plan schematic diagram)" in below four languages were released
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2023.3.15: Monitoring points for fish and seaweed have been added to Sea Area Monitoring page
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Marine Organisms Rearing Test page is available
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2023.3.14: Video using computer graphics -Mechanism for Purification by "Multi-nuclide removal equipment (ALPS)"- in below four languages was released.
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2023.3.13: Overarching Radiation monitoring data Browsing System around Japan is available
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2023.3.10: Schematic diagram of ALPS Treated Water Dilution/Discharge Facility was published
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2023.3.9: Second press briefing for overseas media on the decommissioning efforts at the Fukushima Daiichi Nuclear Power Station
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2023.3.9: Hong Kong Traditional Chinese version launched
2023.2.20: 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
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Please click here for Radiological Environmental Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Construction stage / Revised version) <Corrected version of June 16, 2023>
2023.2.14: 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
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Please click here for Radiological Environmental Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Construction stage) (From 272 page)
2023.2.14: Back filling of discharge outlet caisson (Follow-up report)
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2023.2.13: Video using computer graphics -Mechanism for Purification by "Multi-nuclide removal equipment (ALPS)"- was released
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2023.1.13: (Comment)
Comments following the 5th meeting of the Inter-Ministerial Council concerning the Continuous Implementation of the Basic Policy on Handling of ALPS Treated Water
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2022.12.23: Pamphlet "Report of Assessment of Radiological Impact on Public and Environment Regarding the Discharge of ALPS Treated Water into the Sea (Construction stage)" (as of December 2022) in below four languages was published.
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2022.12.20: The OECD/NEA and nuclear regulatory authorities from various countries visited Fukushima Daiichi Nuclear Power Station
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2022.12.16: Pamphlet "Report of Assessment of Radiological Impact on Public and Environment Regarding the Discharge of ALPS Treated Water into the Sea (Construction stage)" (as of December 2022) was revised.
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2022.12.8: Back filling of discharge outlet caisson Fukushima Daiichi Nuclear Power Station
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2022.11.18: Installation of discharge outlet caisson Fukushima Daiichi Nuclear Power Station
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2022.11.16: Inspection at the Fukushima Daiichi Nuclear Power Station by the IAEA officials for the Second Review of the Safety Aspects of ALPS Treated Water
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2022.11.14: 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
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Please click here for Radiological Environmental Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Construction stage) (From 218 page)
2022.11.11: Governor of Fukushima prefecture, Uchibori Masao's visit to the Fukushima Daiichi Nuclear Power Station
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2022.11.11: As a part of joint project :Collecting samples of seawater, etc. by IAEA and other authorities
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2022.11.9: Overall View of ALPS Treated Water Dilution/Discharge Facility (schematic diagram) was published.
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2022.11.7: UK nuclear industry representatives' visit to the Fukushima Daiichi Nuclear Power Station
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2022.11.2: Collection of seawater, etc. conducted with IAEA and other authorities
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2022.10.19: The third observation of the sampling of ALPS treated water by IAEA review team at the Fukushima Daiichi Nuclear Power Station
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2022.10.3: Explanation Using the ALPS Treated Water Sample Bottle Given during Visits to the Fukushima Daiichi Nuclear Power Station
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2022.9.28: Minister for Reconstruction Kenya Akiba's visit to the Fukushima Daiichi Nuclear Power Station
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2022.9.16: The leaflet “Overview of IAEA Review of Safety Related Aspects of Handling ALPS Treated Water at Fukushima Daiichi Nuclear Power Station” was released.
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2022.8.30: On the Japanese Government’s Summary of the “Approach to Strengthening and Expansion of Measures in the Handling of ALPS Treated Water”
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2022.8.22: METI Minister Yasutoshi Nishimura’s visit to the Fukushima Daiichi Nuclear Power Station
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2022.8.17: Pamphlet “Report of Assessment of Radiological Impact on Public and Environment Regarding the Discharge of ALPS Treated Water into the Sea (Design stage)” (as of June 2022) in below three languages was published.
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Reference: Please click here it for English. (Published in 2022.6.30)
2022.8.15: Q&A on "Handling of Treated Water" has been added.
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2022.8.3: 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
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2022.8.2: Prior Consent of Fukushima Prefecture, Okuma Town, and Futaba Town Regarding the Installation of ALPS Treated Water Dilution/Discharge Facilities, etc. at Fukushima Daiichi Nuclear Power Station based on the Agreement to Ensure Safety in Decommissioning
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2022.7.29: Irish Ambassador to Japan, H. E. Mr. Paul Kavanagh’s visit to the Fukushima Daiichi Nuclear Power Station
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2022.7.22: Approval of the Application for Approval to Amend the Implementation Plan Regarding the Handling of ALPS Treated Water at Fukushima Daiichi Nuclear Power Station by the Nuclear Regulation Authority
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2022.7.19: Chief Cabinet Secretary, Hirokazu Matsuno’s visit to the Fukushima Daiichi Nuclear Power Station
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2022.7.15: 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
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Please click here for Radiological Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Design stage / Revised version) (From 241 page)
2022.7.12: The document of "Revision of the Radiological Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Design stage*)" in below three languages was published.
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Reference: Please click here it for English. (Published in 2022.4.28)
2022.6.30: Pamphlet “Report of Assessment of Radiological Impact on Public and Environment Regarding the Discharge of ALPS Treated Water into the Sea (Design stage)” (as of June 2022) was revised.
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2022.6.1: The document of "New Definition of ALPS Treated Water and the Amount of Tritium in Water being stored in Tanks" in below three languages was published.
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Reference: Please click here it for English. (Published in 2021.4.27)
2022.5.19: IAEA Director General Grossi’s visit to the Fukushima Daiichi Nuclear Power Station
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2022.5.18: Nuclear Regulation Authority Compiles Draft of Review Report
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2022.5.13: 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
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Please click here for Radiological Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Design stage / Revised version)
2022.5.2: Release of Results from International Atomic Energy Agency (IAEA) Review of Safety Related Aspects of the Handling of ALPS Treated Water
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2022.4.28: 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
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Please click here for Radiological Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Design stage / Revised version) (Partially revised on May 13,2022)
2022.4.28: The result of public comments for the “Radiological Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Design stage)”
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2022.3.28: Taiwanese Government officials’ visit to the Fukushima Daiichi Nuclear Power Station.
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2022.3.25: Link were added.
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2022.2.16: IAEA review team conducts field inspection during safety review of ALPS treated water at the Fukushima Daiichi Nuclear Power Station
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2022.2.7: Pamphlet “Report of Assessment of Radiological Impact on Public and Environment Regarding the Discharge of ALPS Treated Water into the Sea (Design stage)” (as of December 2021) was published.
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2021.12.28: (Comment) Regarding the Government’s Action Plan concerning the Continuous Implementation of the Basic Policy on Handling of ALPS Treated Water
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2021.12.21: 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
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Please click here for Radiological Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Design stage) (From 94 page)
2021.12.3: The Nuclear Regulation Authority Chairman Fuketa’s visit to the Fukushima Daiichi Nuclear Power Station
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2021.11.30: Governor of Fukushima prefecture, Uchibori Masao’s visit to the Fukushima Daiichi Nuclear Power Station
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2021.11.19: H.E. Ms. Julia Margaret Longbottom, British Ambassador to Japan’s visit to the Fukushima Daiichi Nuclear Power Station
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2021.11.17: “Radiological Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Design stage)”
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Please click here to see Guidelines for the Submission of Public Comments.
2021.11.17: Visit to the Fukushima Daiichi Nuclear Power Station by the IAEA review mission to assess the safety of ALPS treated water
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2021.10.17: Prime Minister, Fumio Kishida’s visit to the Fukushima Daiichi Nuclear Power Station
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2021.10.17: State Minister of Economy, Trade and Industry, Masahiro Ishii’s visit to the Fukushima Daiichi Nuclear Power Station
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2021.10.11: Minister of Economy, Trade and Industry, Koichi Hagiuda's visit to the Fukushima Daiichi Nuclear Power Station
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2021.8.25: Status of Review Regarding the Handling of ALPS Treated Water at the Fukushima Daiichi Nuclear Power Station
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2021.8.24: (Comment) The Government’s “Tentative Measures” Regarding Handling of ALPS Treated Water
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2021.8.6: WATER MANAGEMENT AT FUKUSHIMA DAIICHI
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2021.7.30: Establishment of ALPS Treated Water Program Department
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2021.7.29: Fukushima Daiichi Nuclear Power Station Status of Review Regarding the Rearing Test of Marine Organisms
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2021.7.12: Status of Review Regarding the Sea Discharge Facility Relevant for the Handling of ALPS Treated Water
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2021.7.9: International Atomic Energy Agency (IAEA) Review of the Handling of Water Treated with Multi-nuclide Removal Equipment at the Fukushima Daiichi Nuclear Power Station.
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2021.6.24: Results of Secondary Treatment Performance Tests for ALPS Treated Water (Third-Party Assessment)
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2021.6.24: Measures to Improve the Reliability of ALPS Outlet Sampling Tanks (Including Flanged Tanks)
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2021.5.27: Open call for “Technology to separate Tritium from Water Treated with Multi-Nuclide Removal Equipment (ALPS)” has started.
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Commencement of Open Call for Tritium Separation Technology in Cooperation with a Third-Party
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Facilities Necessary to Perform Thorough Measurements/Assessments of Radiation Concentrations
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2021.4.28: Pamphlet "What is Tritium?" was published.
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2021.4.27: New Definition of ALPS Treated Water and the Amount of Tritium in Water being stored in Tanks
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2021.4.16: TEPCO Holdings’ Action in Response to the Government’s Policy on the Handling of ALPS Treated Water from the Fukushima Daiichi Nuclear Power Station
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2021.4.13: (Comment) Determination of Government’s Basic Policy on the Handling of ALPS Treated Water from the Fukushima Daiichi Nuclear Power Station
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2021.4.13: Government’s Basic Policy on handling of ALPS treated water at the Tokyo Electric Power Company Holdings’ Fukushima Daiichi Nuclear Power Station
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2021.4.13: We have leveraged various opportunities to hear the opinions of regional residents and other members of society since the publication of our Draft Study on March 24, 2020.
The following is a summary of TEPCO’s thinking in regards to the primary issues touched on in these opinions.
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2020.12.24: "Results from secondary treatment performance confirmation tests on water treated with multi-nuclide removal equipment (final report)" is posted.
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2020.11.26: "Storage amounts of ALPS-treated water* broken down by the sums of ratios of concentrations required by law" is updated.
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2020.11.26: "Results from secondary treatment performance confirmation tests on water treated with multi-nuclide removal equipment (J1-G group) (follow-up report)" is posted.
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2020.11.16: "Results from secondary treatment performance confirmation tests on water treated with multi-nuclide removal equipment (follow-up report)" is posted.
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2020.10.28: Q&A page is revised.
2020.10.15: " Results of tests to confirm the performance of secondary treatment of water treated with multi-nuclide removal equipment (Update)" is posted.
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2020.9.15: Performance confirmation tests of the secondary treatment of water treated with multi-nuclide removal equipment began.
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2020.9.14: Materials on the investigation into the deviation between gross beta and primary 7 nuclide totals for water treated with multi-nuclide removal equipment, etc. (treated water*) are posted.
Please click here to see the material dated on January 17, 2019
Please click here to see the material dated on June 17, 2019
Please click here to see the material dated on March 16, 2020
Please click here to see the material dated on September 14, 2020
2020.9.10: "Performance confirmation tests of the secondary treatment of water treated with multi-nuclide removal equipment" is posted.
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2020.8.27: "<ALPS-Treated Water> Updated Data for Storage Amounts broken down by the Sum of Ratios for Concentrations Required by Law" is posted.
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2020.8.11: Treatment of Sr-treated water was completed on August 8.
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2020.7.30: "Tank Reuse Policy in light of the Results of Analysis of Water in Tanks to be repurposed" is posted.
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2020.7.3: Q&A page is revised.
2020.6.19: "Stabilization and Treatment of Waste generated by Contaminated Water Purification and Treatment Facilities" is posted.
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2020.4.3: Q&A page is revised.
2020.3.27: "Slurry Stabilization Treatment System Installation Plan Status" is posted.
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2020.3.24: TEPCO draft study responding to the “Subcommittee Report on Handling ALPS Treated Water” is posted.
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2020.3.16: Materials on the investigation into the deviation between gross beta and primary 7 nuclide totals for water treated with multi-nuclide removal equipment, etc. (treated water*) are posted.
Please click here to see the material dated on January 17, 2019
Please click here to see the material dated on June 17, 2019
Please click here to see the material dated on March 16, 2020
2020.3.11: Notation of “Water treated with multi-nuclide removal equipment, etc.” was revised depending upon radioactive concentration levels.
2020.2.10: "The Subcommittee on Handling of the ALPS Treated Water Report" was published.
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2020.2.6: "Results of Internal Inspection of Storage Tanks for Water treated with Multi-nuclide Removal Equipment" is posted.
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2020.2.3: The briefing about current status of ALPS treated water was held for diplomatic corps in Tokyo.
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2020.1.31: The 17th Subcommittee on Handling ALPS Treated Water was held.
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2020.1.30: "Plan for repurposing Strontium-treated water tanks for ALPS-treated water tanks" is posted.
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2019.12.23: The 16th Subcommittee on Handling ALPS Treated Water was held.
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2019.11.21: The briefing about current status of ALPS treated water was held for diplomatic corps in Tokyo.
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2019.11.18: The 15th Subcommittee on Handling ALPS Treated Water was held.
2019.10.31: Results of Internal Inspection of ALPS-Treated Water Storage Tanks.
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2019.10.30: “Map of entire site” and “Examination of future site utilization” were added on “Treated Water Storage” page.
2019.9.27: The 14th Subcommittee on Handling ALPS Treated Water was held.
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2019.9.26: “Treated Water Storage” section added
2019.9.4: The briefing about current status of ALPS treated water was held for diplomatic corps in Tokyo.
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2019.8.9: The 13th Subcommittee on Handling ALPS Treated Water was held.
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2019.7.29: Water amount and storage capacity of tanks for the Units 1-4 was changed as the calculating method which had been different for each tank area was unified.
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2019.4.25: Results of Internal Condition Survey and Internal Surface Inspection of Strontium-Treated Water Welded Tanks.
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2019.3.27: The transfer of treated water from the Advanced Liquid Processing System (ALPS) stored in bolted flange tanks to welded tanks was completed.
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2019.2.28: Available for smartphones
2019.1.21: English version launched