International Affairs

In Switzerland, on-going activities regarding safety assessment of the different stages in the lifetime of nuclear installations consist of periodic assessments and assessments of long-term operation for existing Swiss NPPs.

When it comes to international affairs, Switzerland has signed the Convention on Nuclear Safety (CNS) on 31 October 1995. In November 2011, an IRRS Mission was conducted in Switzerland. The results of the mission are currently being implemented, and it is planned to have an IRRS Follow-Up Mission in 2015. In October 2012, an OSART Mission to the Mühleberg NPP was completed. Switzerland participated in the European Stress Test and its Follow-Up activities.


The parties to the Joint Convention met under Swiss presidency from 4 to 6 May 2022 for an extraordinary meeting at the IAEA headquarters in Vienna. The purpose of the meeting was to further develop the review processes of the international Convention on the Safety of Spent Fuel Management and on the Safety of Radioactive Waste Management. ENSI represented Switzerland at this meeting.

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The first review conference of the Amended Convention on the Physical Protection of Nuclear Material took place from 28 March to 1 April 2022. Switzerland lobbied for a repeated review of the implementation of the Amended Convention, to be carried out in five years time as part of an IAEA conference.  The Amended Convention on […]

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ENSI is participating in two large-scale international research projects providing data on the ageing phenomena of reactors and on the operating and accident behaviour of fuel rods. The findings are being incorporated into ENSI’s safety assessments.

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