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  5. The IAEA Conducted a Review Mission on the Safety of the Discharge of ALPS Treated Water

The IAEA Conducted a Review Mission on the Safety of the Discharge of ALPS Treated Water

December 13, 2024

From December 9 to 12, the IAEA Task Force, consisting of the IAEA officials and international experts, visited Japan for the review on the safety of the discharge of the ALPS treated water from TEPCO’s Fukushima Daiichi Nuclear Power Station (FDNPS) into the sea.

Six IAEA officials, including Mr. Gustavo Caruso, Director and Coordinator, Department of Nuclear Safety and Security (head of the IAEA Task Force), and nine international experts (from Argentina, Canada, China, France, the Republic of Korea, Russia, the United Kingdom, the United States, and Vietnam), visited Japan for the review mission regarding the safety of the discharge of the ALPS treated water from TEPCO’s FDNPS into the sea. This is the third review mission after the start of the discharge into the sea.

During the review mission, the IAEA Task Force discussed technical details regarding the safety of the discharge of the ALPS treated water into the sea based on the IAEA international safety standards and visited TEPCO’s FDNPS to review the site. The overview of the meetings and the site visit to TEPCO’s FDNPS is as follows.

1. Overview of Meetings during the Review

On December 9 and 12, the Government of Japan (MOFA and METI) and TEPCO explained the updates on the status of the ALPS treated water discharge from April to November 2024 and the results of sea area monitoring since the start of the discharge, etc. Also, they discussed the effort consistent with the IAEA international safety standards after the start of the discharge and the radiological environmental impact assessment for one year after the commencement of discharge, etc., with the IAEA Task Force.
  • the IAEA Task Force 
    (Discussion with METI and TEPCO)
  • Mr. Caruso
     (Head of the IAEA Task Force)

2. Overview of Site Visit to the FDNPS during the Review

On December 11, the Task Force visited TEPCO’s FDNPS to receive a briefing from TEPCO on the latest situation at the site and to review the status of the discharge of the ALPS treated water, including facilities for measuring the ALPS treated water and for dilution with seawater.
  • Checking tanks for measurement and confirmation (K4 tank group)
  • Checking ALPS treated water transfer pump

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