Press Releases

Visit of IAEA officials and international experts for a review on the discharge of ALPS treated water from TEPCO’s Fukushima Daiichi Nuclear Power Station into the Sea

December 8, 2025

From December 15 to 19, the IAEA Task Force consisting of the IAEA officials and international experts will visit Japan for the review on the safety and regulatory aspects of the discharge of ALPS treated water from TEPCO’s Fukushima Daiichi Nuclear Power Station (FDNPS) into the sea.

The Government of Japan will continue to provide necessary information to the IAEA. The Government of Japan also remains committed to making efforts to foster better understanding both domestically and internationally regarding the handling of ALPS treated water.

(Reference1) Composition of IAEA Task Force

The IAEA Task Force includes 11 international experts, serving in an independent position, from Argentina, Australia, Canada, China, France, Republic of Korea, the Marshall Islands, Russia, the United Kingdom, the United States, and Vietnam.

(Reference2) 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.


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