Swiss federal authorities

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  • Swiss Delegation to the 2026 CNS Review Meeting
    News, Posts

    CNS Review Meeting 2026: positive result for Switzerland and identified challenge concerning the availability of national expertise

    Switzerland received a positive overall assessment at the tenth Review Meeting of the Convention on Nuclear Safety. Alongside several areas where its performance was assessed as particularly good, one key challenge was identified concerning the long-term availability of technical expertise.

  • Bild mit Dokumenten

    Summary Report CNS 2026

    10th Review Meeting of the Contracting Parties to the Convention on Nuclear Safety

  • Organisation

    ENSI’s organisation is governed by the Swiss Federal Nuclear Safety Inspectorate Act (ENSIG).

  • Country Review Report CNS 2023

  • Report of the Integrated Regulatory Review Service (IRRS) Mission to Switzerland

    The 2021 IRRS mission took place in Switzerland from 18 to 29 October with the aim of reviewing nuclear oversight.

  • Ageing Guide for Dry Interim Storage

    This guide applies to transport and storage casks, also named as dual purpose casks (DPC), for spent fuel elements and high active waste that are used for dry interim storage.

  • Oversight Culture 2015: ENSI Report on Oversight Practice

  • ENSI Hybrid Model: Hazard Figures

    Although nuclear power plants are some of the most earthquake-resistant buildings in Switzerland, earthquakes are a major part of the risk of nuclear power plants. “This is precisely why we are so keen to ensure that nuclear plant operators regularly update their comprehensive seismic safety cases and that these then comply with the latest scientific…

  • PEGASOS: Updated seismic hazard assumptions for Swiss NPPs

    ENSI-AN-9657 ENSI closely followed the PRP project from its inception with an experienced expert team. In its final review report ENSI acknowledged that the state-of-the-art in probabilistic seismic hazard assessment was further improved by the PRP project. ENSI assessed the achieved refinements in the project focal points – the «ground motion characterization» (subproject 2) and the…