Swiss federal authorities

Nuclear facilities

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  • Nuclear Power Plants in Switzerland

  • News

    The core shroud does not perform a barrier function

    A core shroud is installed inside the pressure vessel in every reactor. This shroud is cylindrical in shape and is made of thick steel plate; it is not under pressure, and it does not perform a barrier function in order to contain radioactivity. ENSI assesses the integrity of core shrouds.

  • Background articles

    New Nuclear Power Plants

    In 2008, general licence applications were submitted for three new nuclear power plants in Switzerland: the Mühleberg replacement nuclear power plant, the Beznau 1 & 2 replacement nuclear power plants, and a new construction project at Niederamt in the canton of Solothurn. For the purposes of the general licences, ENSI began by examining whether the…

  • Taking Nuclear Power Plants out of Service

    The Federal Council and the Swiss Parliament have decided to abandon nuclear energy. Existing nuclear power plants are not to be replaced by new ones at the end of their operating lifetimes.

  • Background articles

    Radiation Measurement Technology

    Development and Research Work in the Field of Radiation Measurement Technology: this project deals with the verification and calibration of dosimetry systems and radiation measurement instruments. On the one hand, importance attaches to personal dosimetry, i.e. the measurement of the outer and inner radiation exposure for people.

  • Background articles

    Non-Destructive Measurements on the Containment

    Feasibility Study for Non-Destructive Measurements on the Steel Pressure Shell of the Primary Containment of Nuclear Power Plants: the primary circuit, including the reactor pressure vessel, is enclosed by a steel pressure shell as part of the defence-in-depth safety barriers. Depending on the structural design of the nuclear power plant, this is directly surrounded by…

  • Background articles

    PISA

    PISA, Pressure Vessel Integrity and Safety Analysis: in connection with the long-term operation of the Swiss nuclear power plants, it must be proven that the integrity of the reactor pressure vessel (RPV) continues to be guaranteed during normal operation and also in case of operating faults and postulated incidents. The PISA project was launched in…

  • Cooling Water Intake at the Mühleberg Nuclear Power Plant: New Structures Released for Operation

    ENSI has accepted the back-fitting measures for the cooling water intakes at the Mühleberg nuclear power plant (KKM) and has issued a permit for them to operate.

  • Hochwasser Aargau vom 09.08.2007

    The Safety of Swiss Nuclear Plants in case of External Flooding

    External floods are events against which Swiss nuclear plants have to protect themselves. In order to ensure such protection, the nuclear power plant operators are obliged to review the hazard at regular intervals on the basis of experience and the latest developments in science and technology. As appropriate, they must initiate measures to continue improving…