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  • News, Posts

    Commission franco-suisse 2026: cross-border cooperation continues in the interests of nuclear safety

    At the 35th plenary meeting of the Commission franco-suisse , held on 24 and 25 June 2026 in Spiez, in the canton of Bern, the French and Swiss delegations discussed recent developments in nuclear safety and set out the priorities for bilateral cooperation for the coming year.

    Bilateral Cooperation, ENSI
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  • News, Posts

    2025 Oversight Report: Compliance with approved operating conditions

    The Swiss nuclear installations complied with the legal requirements for their operation. There were no impermissible releases of radioactive substances into the environment. This is the conclusion reached by ENSI for the 2025 oversight year.

    Annual reports, Documents, Dokumente, ENSI, Jahresberichte
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  • 2025 Oversight Report – ENSI-AN-12500

    In 2025, the Swiss nuclear installations complied with the approved operating conditions. The safety status of the Beznau and Leibstadt nuclear power plants (NPPs) was good. ENSI is not issuing an overall assessment for Gösgen NPP while the findings concerning its feedwater system are still being evaluated and the plant remains in an extended shutdown.…

    Annual reports, Documents, ENSI, Events
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  • News, Posts

    The International Nuclear Safety Policy Advisors Group INSPAG continues to grow

    At its fourth meeting in May 2026 in Schaffhausen, the International Nuclear Safety Policy Advisors Group (INSPAG) welcomed three new members: Italy, South Africa and the United States of America. This brings the total number of members in the network of officials responsible for international affairs to sixteen.

    ENSI, Multilateral Cooperation
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  • News, Posts

    Federal Council approves ENSI Board’s 2025 activity and business report

    The ENSI Board considers ENSI’s oversight of Swiss nuclear installations to be responsible, effective and of high quality.

    Annual reports, Documents, Dokumente, ENSI, ENSI as regulatory body, ENSI Board, Jahresberichte, The ENSI Board
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  • Allgemein, News, Posts

    25th Austria–Switzerland bilateral meeting: discussion on deep geological disposal, radiation protection and current issues related to nuclear safety

    On 27 and 28 May 2026, the Austrian and Swiss delegations held their annual bilateral meeting, during which they exchanged information on various topics, including the progress of the Sectoral Plan for Deep Geological Repositories and radiological monitoring.

    Bilateral Cooperation
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  • Guideline ENSI-B11 - Emergency Exercises

    Emergency Exercises

    ENSI-B11/en Guideline ENSI-B11 regulates the requirements for the preparation for and performance of emergency exercises. In addition, it defines the implementation of the general emergency exercises to be carried out in the vicinity of nuclear installations as part of the radiological emergency preparedness framework under the supervision of the Federal Office for Civil Protection (FOCP)…

    Documents, ENSI, Guidelines, Legal and Regulatory Framework
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  • Cover of the document Stellungnahme des ENSI zur Kostenstudie
    News, Posts

    The 2021 cost study reflects the state of the art and makes pragmatic assumptions

    The basic technical information contained in the 2021 cost study is suitable to calculate expected costs for the decommissioning of nuclear installations in Switzerland and for disposing of radioactive waste. This was the conclusion reached by the Swiss Federal Nuclear Safety Inspectorate (ENSI) based on its technical review of the cost studies carried out the…

    Advisory opinions, Documents, Dokumente, ENSI
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  • IAEA Regulators’ Conference 2026
    News, Posts

    IAEA Regulators’ Conference 2026: Perspectives on a resilient regulatory culture

    From 27 to 30 April 2026, ENSI participated in the Regulators’ Conference of the International Atomic Energy Agency (IAEA) in Vienna. In the panel discussion on resilient regulatory culture, ENSI Director General Marc Kenzelmann presented ENSI’s perspective.

    ENSI, Multilateral Cooperation
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