Swiss federal authorities

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  • News, Posts

    2023 Oversight Report: The safety status of the nuclear power plants is good

    ENSI verified the status of the Swiss nuclear power plants by 327 inspections. In 2023, the year under review, 22 reportable nuclear-safety-relevant incidents were recorded at the nuclear power plants. ENSI provides detailed information in the oversight report published today.

  • Organisation

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

  • The Organisation of Nuclear Installations

    ENSI-G07/e This Guideline stipulates the requirements for the organisation of nuclear installations in the operational and post-operational phase.It includes references to other ENSI Guidelines as follows: The requirements for the training and qualification of personnel at nuclear installations are stipulated in Guidelines ENSI-B10 and ENSI-B13. The requirements for the emergency response organisation at nuclear installations…

  • Deep Geological Repositories

    ENSI-G03 This guideline applies to deep geological repositories and the associated surface facilities and near-surface access structures. Pursuant to Article 3 letter c of the Nuclear Energy Act of 21 March 2003 (NEA; SR 732.1), a deep geological repository is a nuclear facility for the disposal of radiological waste in a deep geological formation, which…

  • ENSI’s Research Strategy

    Projects in the ENSI Research Programme help clarify outstanding issues, establish fundamental principles and develop the tools that ENSI requires to discharge its responsibilities. The projects also foster the skills needed for regulatory activities and help develop independent expertise. Finally, international projects deliver results that Switzerland could not achieve on its own and at the…

  • Summary Report CNS 2023

  • Country Review Report CNS 2023

  • Integrated Oversight

    Oversight of nuclear safety at Switzerland’s nuclear facilities has developed gradually. The oversight strategy that had evolved historically was thoroughly systematised in the period around the turn of the millennium, entailing the introduction of a management system and the development of an “Integrated Oversight” strategy. The objective of this publication is to present the fundamental…

  • 2021 ENSI Oversight Report 2021 – ENSI-AN-11140

    ENSI concludes that the operators complied with the licensed operating conditions in 2021 and fulfilled their legally stipulated reporting obligations. In the year under review, a total of 24 reportable events occurred at the nuclear power plants and at the Paul Scherrer Institute, all of which were assigned to level 0 of the International Event…