Nuclear Power Plants

Switzerland has five nuclear power plants: Beznau I & II, Mühleberg, Gösgen and Leibstadt. In addition to the nuclear power plants, three research reactors are in operation: at the Paul Scherrer Institute in Würenlingen, the Swiss Federal Institute of Technology (ETH) in Lausanne and the University of Basel. And finally, the national central interim storage facility for radioactive waste (ZWILAG) at Würenlingen is also monitored by ENSI.

 

 

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Background Articles

Heat is generated in the reactor as a result of nuclear fission. To guarantee optimum cooling of the fuel rods, their cladding tubes must always be covered with a film of water. If they are not completely covered with water in specific areas, this is referred to as “dryout”.

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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 […]

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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. This field also covers measurements of the release […]

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Documents

This Research and Experience Report describes and rates the findings of the regulatory research into safety, specific instructive events from nuclear facilities abroad, news regarding the international cooperation as well as current changes and developments in underlying surveillance principles in 2015.

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This Research and Experience Report describes and rates the findings of the regulatory research into safety, specific instructive events from nuclear facilities abroad, news regarding the international cooperation as well as current changes and developments in underlying surveillance principles in 2014.

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In 2014, the licensees complied with their statutory obligations to provide ENSI with reports and nuclear safety at all plants was rated as good. There were 38 reportable events in the Swiss nuclear power plants: 5 events at each of the two Beznau units, 11 at Gösgen, 9 at Leibstadt and 8 at Mühleberg. During the year under review, there was one reactor scram, which […]

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Periodic: PCO2019-Request 1:Non-destructive tests using qualified testing systems must be carried out on KKM’s core shroud during every annual outage. PCO2019-Request 2:As part of every annual outage, the findings from the core shroud tests must be assessed on the basis of the latest developments in science and technology and international operating experience. The permit to […]

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Oversight of nuclear safety at Switzerland’s nuclear facilities has developed gradually. The oversight strategy that had evolved historically was thoroughly systematised in the period around the turn of the millennium, entailing the introduction of a management system and the development of an “Integrated Oversight” strategy. The objective of this publication is to present the fundamental […]

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In 2013, there were 34 reportable events in the Swiss nuclear power plants: 7 events at the two Beznau units, 7 at Gösgen, 7 at Leibstadt and 13 at Mühleberg. During operation, there were no reactor scrams recorded. On the INES scale, ranging from 0–7, ENSI rated all reportable events in nuclear power plants in 2013 as Level 0.   […]

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This Research and Experience Report describes and rates the findings of the regulatory research into safety, specific instructive events from nuclear facilities abroad, news regarding the international cooperation as well as current changes and developments in underlying surveillance principles in 2013.

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