Swiss federal authorities

International Nuclear Event Scale (INES)

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  • International Nuclear Event Scale (INES)

    To ensure that the nature and severity of an incident in a nuclear power plant could be described in the same way everywhere, the International Atomic Energy Agency (IAEA) worked with the Organisation for Economic Cooperation and Development (OECD) to develop an international scale of events for nuclear installations. Today, the INES scale is used…

  • INES 7

    According to a guideline issued by the International Atomic Energy Agency (IAEA), an accident is classified as INES 7 if there has been a release of more than 50,000 terabecquerels of radioactivity. This value was exceeded at Fukushima. The becquerel (Bq) is the unit used to measure the activity of a radioactive material. 1 Bq…

  • INES levels

    The International Nuclear Event Scale (INES), which comprises seven levels, is now applied throughout the world.