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  • Documents

    Annual account 2025 (in German)

    Dokumente, Jahresberichte
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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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  • ENSI Board’s 2025 activity and business report

    Note: The report is in German.

    Dokumente, ENSI Board, Jahresberichte
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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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  • Strahlenschutzbericht 2025
    News, Posts

    Effective radiation protection in Swiss nuclear installations confirmed once again

    ENSI’s Radiation Protection Report 2025 shows that all Swiss nuclear installations remained well within the legal requirements for the release of radioactive substances into the environment and the radiation exposure of personnel. ENSI verified this during the year under review through inspections, measurements and checks.

    Abgaben radioaktiver Stoffe, Annual reports, Documents, Dokumente, Emergency Preparedness, Emissions, Jahresberichte, MADUK, Measured Value about Swiss nuclear power plants, Radiation Protection, Radioactivity
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  • Radiation Protection Report 2025 – ENSI-AN-12569

    ENSI’s Radiation Protection Report 2025 shows that all Swiss nuclear installations remained well within the legal requirements for the release of radioactive substances into the environment and the radiation exposure of personnel in 2025.

    Dokumente, Jahresberichte, Radiation Protection
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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

    ENSI’s advisory opinion concerning the 2021 cost study

    Advisory opinions, Documents
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