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- As a Part of Additional Measures under the IAEA Framework, ALPS Treated Water before Dilution with Seawater was Sampled on the Premises of TEPCO’s FDNPS
As a Part of Additional Measures under the IAEA Framework, ALPS Treated Water before Dilution with Seawater was Sampled on the Premises of TEPCO’s FDNPS
June 17, 2025
On June 17, International Atomic Energy Agency (IAEA) officials and experts from third-party laboratories sampled ALPS treated water before dilution with seawater on the premises of Tokyo Electric Power Company Holdings (TEPCO)’s Fukushima Daiichi Nuclear Power Station (FDNPS).
In September 2024, Japan and the IAEA concurred on conducting the additional measures under the IAEA framework. This additional measure was conducted as a fourth mission, following the missions in October 2024, February 2025, and April 2025.
In the additional measure, IAEA officials and experts from laboratories from Belgium, China, Republic of Korea, Russia, and Switzerland sampled ALPS treated water before dilution with seawater from measurement/confirmation tanks on the premises of TEPCO’s FDNPS. This was the second mission for sampling ALPS treated water before dilution with seawater as a part of additional measures, following the mission in February 2025.
Ministry of Economy, Trade and Industry will continue to maintain close coordination with the IAEA in sharing information with the international community in a highly transparent manner and fostering better understanding of the safety of the discharge of ALPS treated water within both the domestic and international communities.
〔Reference〕measurement/confirmation tanks
The tanks used to receive ALPS treated water from the storage tanks etc. on the premises of TEPCO’s FDNPS, and to circulate and stir ALPS treated water to collect representative samples for the analysis prior to the dilution and discharge.
The tanks used to receive ALPS treated water from the storage tanks etc. on the premises of TEPCO’s FDNPS, and to circulate and stir ALPS treated water to collect representative samples for the analysis prior to the dilution and discharge.
Related Links
- 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 (April 15, 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)
- Let's get to know and understand about ALPS treated water [Ministry of Economy, Trade and Industry]
- IAEA Website about ALPS treated water
Division in Charge
Nuclear Accident Response Office, Agency for Natural Resources and Energy