Japan — September 2, 2025 The International Atomic Energy Agency (IAEA) has commenced its third comprehensive marine sampling mission near the Fukushima Daiichi Nuclear Power Station, continuing its long-term review of Japan’s discharge of ALPS-treated water into the Pacific.
Running from September 2 to 12, the mission involves collecting samples of seawater, sediment, fish, and seaweed from coastal zones surrounding the plant. The IAEA team will also observe sample preparation at local facilities and conduct quality checks at a nearby fish market.
This initiative is part of the IAEA’s broader effort to independently verify Japan’s environmental monitoring and ensure transparency in radiological safety. Experts from France, South Korea, and Switzerland—members of the IAEA’s ALMERA network—are participating to provide cross-border validation of the data.
Once collected, samples will be distributed to laboratories in Monaco, Vienna, and partner institutions for detailed radionuclide analysis. Final results are expected in late 2026, following rigorous interlaboratory comparisons.
The IAEA has previously confirmed that tritium levels in discharged water remain well below operational limits, and this latest mission aims to reinforce public confidence in the safety of ongoing releases.
Source: International Atomic Energy Agency