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Publication of the Results for the IAEA’s First Interlaboratory Comparison on the Determination of Radionuclides in ALPS Treated Water

June 1, 2023

On May 31, 2023, the IAEA published its results for the first interlaboratory comparison on the determination of radionuclides in ALPS treated water.

  1. The published report describes the results of IAEA’s data corroboration of TEPCO’s monitoring of ALPS treated water.
  2. The IAEA has published five other reports to date on the safety review, the review to the NRA, and the IAEA activities for data corroboration regarding monitoring. This is the first report by the IAEA that summarizes the results of an interlaboratory comparison (ILC) conducted under the IAEA’s safety review.
  3. The Government of Japan will continue to provide necessary information to the IAEA. The Government of Japan also remains committed to making efforts to promote better understanding in the international community regarding the handling of ALPS treated water.

[Reference 1] ALPS treated water is water which is processed by devices such as ALPS (Advanced Liquid Processing System) to ensure that the concentration of the radioactive materials other than tritium surely meet the regulatory standards for safety. In addition, it is planned that ALPS treated water will then be sufficiently diluted before the discharges into the sea so that concentration of all radioactive materials including tritium will be far below the regulatory standards for safety.

[Reference 2] Reports on IAEA’s Safety Review

  • (1) The 1st report (PDF)Open a New Window published on April 29th, 2022, describes the details of IAEA’s review mission to METI and TEPCO conducted in February 2022, related to eight different technical areas, including the characterization of discharge and source term, the safety-related aspects of system and processes for controlling discharges, and the radiological environmental impact assessment.
  • (2) The 2nd report (PDF)Open a New Window published on June 16th, 2022, describes the details of IAEA’s review mission to the Nuclear Regulation Authority conducted in March 2022, related to five technical topics, including the responsibilities and functions of the government, major principles and safety objectives, and authorization process.
  • (3) The 3rd report (PDF)Open a New Window published on December 29, 2022, describes the IAEA’s planned activities for the analysis and data corroboration of source monitoring of the ALPS treated water, environmental monitoring, and occupational radiation protection for workers at the FDNPS.
  • (4) The 4rd report (PDF)Open a New Window published on April 5, 2023, describes the details of IAEA’s review mission to METI and TEPCO conducted in November 2022, related to eight different technical areas, including the characterization of discharge and source term, the safety-related aspects of system and processes for controlling discharges, and the radiological environmental impact assessment.
  • (5) The 5th report (PDF)Open a New Window published on May 4, 2023, describes the details of IAEA’s review mission to the Nuclear Regulation Authority conducted in January 2023, related to the five technical topics, including the responsibilities and function of the government, major principles and safety objectives, and authorization process.

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