Press Releases
Publication of the report on the analytical results of the Additional Measures under the IAEA framework related to the discharge of ALPS treated water into the sea
On June 2, 2025, the IAEA published the report on the analytical results of seawater samples collected by Japanese laboratories, IAEA officials and experts from third-party laboratories from China, the Republic of Korea and Switzerland selected by the IAEA in the vicinity of Tokyo Electric Power Company Holdings’s Fukushima Daiichi Nuclear Power Station in October 2024 as part of the additional measures under the IAEA framework.
- In the published report, the IAEA concluded that the results reported by the participating laboratories in the additional measures are consistent with the IAEA Comprehensive Report on the Safety Review of the ALPS-Treated Water released in July 2023 which concluded that the discharge would have a negligible radiological impact on people and the environment.
- 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 a better understanding of the safety of the discharge of ALPS treated water within both the domestic and international communities.
(Reference1) 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)
(Reference2) Related links
(Reference3) ALPS treated water
ALPS treated water is water that contained radioactive substances from inside the buildings of TEPCO’s FDNPS, and has been purified and treated through multiple treatment facilities, including ALPS (Advanced Liquid Processing System), until the concentrations of all radioactive substances besides tritium satisfy the safety regulatory standards. As for tritium, the water is significantly diluted with seawater before the discharge into the sea so that it fully satisfies safety regulatory standards.