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Periodic safety inspection and safety verification

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  • Periodic Safety Inspection and Safety Verification

    According to the Nuclear Energy Act, the licensee of a nuclear power plant must periodically carry out a comprehensive safety check (Periodic Safety Review, PSR) and, after the fourth decade of operation, provide a safety case for long-term operation. The Nuclear Energy Ordinance specifies the content of the PSR and the safety case for long-term…

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  • 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…

    Advisory opinions, Beznau Nuclear Power Plant, Documents, Nuclear Facilities, Periodic Safety Inspection and Safety Verification
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  • 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:

    Beznau Nuclear Power Plant, Documents, Expert reports, Nuclear Facilities, Periodic Safety Inspection and Safety Verification
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  • ENSI Hybrid Model: Hazard Figures

    Although nuclear power plants are some of the most earthquake-resistant buildings in Switzerland, earthquakes are a major part of the risk of nuclear power plants. “This is precisely why we are so keen to ensure that nuclear plant operators regularly update their comprehensive seismic safety cases and that these then comply with the latest scientific…

    Documents, Earthquakes, Nuclear Facilities, Other documents, PEGASOS, Periodic Safety Inspection and Safety Verification
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  • PEGASOS: Updated seismic hazard assumptions for Swiss NPPs

    ENSI-AN-9657 ENSI closely followed the PRP project from its inception with an experienced expert team. In its final review report ENSI acknowledged that the state-of-the-art in probabilistic seismic hazard assessment was further improved by the PRP project. ENSI assessed the achieved refinements in the project focal points – the «ground motion characterization» (subproject 2) and the…

    Documents, Earthquakes, Nuclear Facilities, Other documents, PEGASOS, Periodic Safety Inspection and Safety Verification
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  • ENSI Final Report: Review Approach and Comments Concerning the PEGASOS Refinement Project (PRP) and the PRP Summary Report

    ENSI-AN-9060 The Swiss Federal Nuclear Safety Inspectorate ENSI has set out new requirements for assessing seismic hazards in Swiss nuclear power plants in the light of the latest scientific findings. Plant operators are required to provide further proof, in three stages, by the end of 2020, that their plants can withstand even an extremely unlikely…

    Documents, Earthquakes, Nuclear Facilities, Other documents, PEGASOS, Periodic Safety Inspection and Safety Verification
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