Swiss federal authorities

Nuclear facilities

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  • Würenlingen Interim Storage Facility (Zwilag)

    The Central Interim Storage Facility (ZZL) of Zwilag Zwischenlager Würenlingen AG consists of several interim storage buildings, a conditioning plant and an incineration/melting plant (plasma plant).

  • EPFL Research Reactor

    The nuclear installations of the École Polytechnique Fédérale de Lausanne (EPFL) include the CROCUS research reactor, the CARROUSEL neutron experiment, the LOTUS neutron source, and the associated laboratories.

  • PSI Nuclear Facilities

    The Paul Scherrer Institute PSI is the largest research institute for natural and engineering sciences in Switzerland. It develops, builds, and operates large-scale research facilities, and conducts research into future technologies, energy and climate, health innovation, and the fundamentals of nature.

  • Leibstadt Cooling Pond

    Irradiated fuel elements are packed into transport and storage containers after several years’ storage in the plant’s fuel pond and transferred to the Central Interim Storage Facility (Zwilag) for dry storage. News Background articles Documents

  • Gösgen Storage Pond

    The wet storage facility of Gösgen NPP comprises a fuel element storage building and a building wing with a passageway to the existing nuclear power plant building. A maximum of 1,206 spent fuel elements can be stored in the wet storage facility. They are located in a water-filled pond. News Background articles Documents

  • Interim Storage Facility ZWIBEZ

    Irradiated fuel elements are packed into transport and storage containers after a few years’ storage in the operational fuel pond and transferred to the Beznau interim storage facility (ZwiBez) for dry storage. ZwiBez is located on the premises of the Beznau Nuclear Power Plant. It is used for the interim storage of spent fuel and…

  • News, Posts

    Integrated Oversight: ENSI updates safety indicators

    Based on oversight experience, ENSI has reviewed the safety indicators introduced within the framework of integrated oversight.

  • Background articles, News, Posts

    New study on extreme flooding of the River Aare is also relevant for nuclear power plant sites

    Today, the Federal Office of the Environment, FOEN, published its study “Extreme Flooding of the River Aare”. Their findings also include a re-evaluation of the flood risk to nuclear installations located on the Aare. ENSI will now require those nuclear installations concerned to update their safety cases.

  • Background articles, News, Posts

    All Swiss nuclear power plants comply with the updated earthquake safety standards

    For the second time since the Fukushima accident in 2011, power plant operators have demonstrated that their plants are capable of withstanding an extremely rare, severe earthquake. The safety case for a flood caused by an earthquake has also been checked. The findings from the safety proofs generated in the aftermath of Fukushima have been…