Swiss federal authorities

Nuclear facilities

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  • News, Posts

    New studies on protection of Swiss nuclear power plants against a deliberate plane crash now completed

    Swiss nuclear power plants have an adequate level of protection against a deliberate plane crash. This is confirmed by an update of the associated analyses ordered by the Swiss Federal Nuclear Safety Inspectorate (ENSI) in 2013. For security reasons, the details are confidential.

  • News, Posts

    Video interview: Beznau 1 Nuclear Power Plant gets the go-ahead to start up again

    Hans Wanner, Director General of ENSI: “Axpo has proved that the inclusions found in the steel of the reactor pressure vessel do not have a negative effect on the safety. ”

  • News

    Beznau 1: Aluminium oxide inclusions do not have a negative impact on reactor pressure vessel safety

    Beznau 1 NPP gets the go-ahead to start up again. Axpo has proved that the inclusions found in the steel of the reactor pressure vessel do not have a negative effect on safety. ENSI, the Swiss Federal Nuclear Safety Inspectorate, has reviewed and accepted the safety case.

  • Interviews, News, Posts

    “Extensive test program shows no evidence of a detrimental effect of the inclusions on the brittle fracture reference temperature”

    An international panel of experts supported the Swiss Federal Nuclear Safety Inspectorate ENSI in assessing Axpo’s safety case for the Beznau 1 reactor pressure vessel. In an interview, the chair of the review panel Tim Williams explains why they support the conclusion that Beznau 1 may be restarted.

  • News, Posts

    Chronology: from the findings in Belgium to the proof of safety from Beznau 1

    In the summer of 2012, findings are detected in the basic material of the reactor pressure vessel of the Belgian nuclear power plant Doel-3. As a result, nuclear power plants in Switzerland also have to carry out inspections. Since findings are also detected in the reactor pressure vessel of Beznau 1, Axpo needs to prove…

  • ENSI Review of the Axpo Power AG Safety Case for the Reactor Pressure Vessel of the Beznau NPP Unit 1

    In the summer of 2012, findings are detected in the basic material of the reactor pressure vessel of the Belgian nuclear power plant Doel-3. As a result, nuclear power plants in Switzerland also have to carry out inspections. Since findings are also detected in the reactor pressure vessel of Beznau 1, Axpo needs to prove…

  • Assessment of the Safety Case for the Reactor Pressure Vessel of the Beznau Unit 1 Nuclear Power Plant

    The IRP considers that the Axpo Safety Case is acceptable. This is based on the following:

  • News, Posts

    The carbon content of the steam generators at Beznau and Gösgen is not too high

    The steam generators at Beznau and Gösgen do not deviate from the design requirements in terms of their carbon content. This is the result of a review of the manufacturing documents. The structural integrity of the steam generators’ individual components is ensured by a large margin.

  • News, Posts

    “Cladding tube damage poses no risk to mankind or the environment”

    The Swiss Federal Nuclear Safety Inspectorate (ENSI) has issued Leibstadt Nuclear Power Plant (KKL) approval to restart subject to conditions. The conditions under which dryouts have occurred at KKL are known. KKL has instigated counter measures. Consequently operation is safe. In an interview Ralph Schulz, Director of the Safety Analyses Division, shares some background insights.