Press Releases
Additional Measures under the IAEA Framework Related to the Discharge of ALPS Treated Water into the Sea (Results)
May 29, 2026
As a part of the additional measures under the IAEA framework that Japan and the IAEA concurred on conducting in September 2024, IAEA officials and experts from third-party laboratories visited Japan and collected samples on May 29.
- On May 29, IAEA officials and experts from laboratories from China, the Republic of Korea, Russia, and Switzerland sampled ALPS treated water prior to dilution with seawater from the measurement/confirmation tanks on the premises of Tokyo Electric Power Company Holdings (TEPCO)’s Fukushima Daiichi Nuclear Power Station (FDNPS).
- This was the eighth mission for conducting the additional measures since October 2024.
- The Government of Japan 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.
(Reference1) 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.
(Reference2) Past missions for conducting the additional measures
- 1st: October 15, 2024 (collection of seawater)
- 2nd: February 19, 2025 (collection of seawater), February 20, 2025 (selection of fishery products), February 21 ,2025 (collection of ALPS treated water prior to dilution with seawater)
- 3rd: April 15, 2025 (collection of ALPS treated water diluted with seawater prior to the discharge into the sea)
- 4th: June 17, 2025 (collection of ALPS treated water prior to dilution with seawater)
- 5th: September 9, 2025 (collection of seawater), September 10, 2025 (selection of fishery products)
- 6th: December 5, 2025 (collection of ALPS treated water diluted with seawater prior to the discharge into the sea)
- 7th: February 4, 2026 (collection of seawater), February 5, 2026 (selection of fishery products)
- 8th: May 29, 2026 (collection of ALPS treated water prior to dilution with seawater)