The main aims of ENSI’s international cooperation are the global improvement of nuclear safety and security, and the strengthening of oversight in Switzerland. This is achieved through active participation in the international regulatory exchange of information and experience and through participation in international review missions.
ENSI monitors the development of international safety standards and foreign regulatory authorities, the latest state of the art of science and technology, and international operating experience. By doing so, it selectively influences the development of international regulations on nuclear safety and security. It participates in the further development of international safety standards with trend-setting requirements.
These are the most important areas of work within the framework of the international activities and cooperation of ENSI:
- the International Atomic Energy Agency IAEA,
- the OECD Nuclear Energy Agency OECD-NEA,
- the Western European Nuclear Regulators Association WENRA,
- the European Nuclear Safety Regulators Group ENSREG,
- the Heads of European Radiological Protection Competent Authorities HERCA,
- the European Association of Competent Authorities EURACA,
- the European Network on Operational Experience Feedback EU Clearinghouse,
- and the European Nuclear Security Regulators Association ENSRA.
News
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IAEA Commission Discusses Safety Standards and New Nuclear Technologies
The 60th session of the Commission on Safety Standards (CSS) took place in Vienna from 19 to 22 October 2026. Chaired by ENSI Director General Marc Kenzelmann, the Commission addressed the revision of existing safety requirements. Participants also discussed how the international regulatory framework should be adapted to reflect new scientific findings and technological developments.
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Fire Protection in Nuclear Facilities: Switzerland submits action plan
Switzerland has submitted its national action plan for the second Topical Peer Review (TPR II) on fire protection in nuclear facilities to the European Nuclear Safety Regulators Group (ENSREG) by the deadline. The action plan addresses and follows up on both the areas identified for improvement and those where performance is already good.
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The International Nuclear Safety Policy Advisors Group INSPAG continues to grow
At its fourth meeting in May 2026 in Schaffhausen, the International Nuclear Safety Policy Advisors Group (INSPAG) welcomed three new members: Italy, South Africa and the United States of America. This brings the total number of members in the network of officials responsible for international affairs to sixteen.
Background-articles
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The 12 IRRS mission modules
During the two-week IRRS mission, the IAEA experts will investigate how ENSI performs its supervisory duties. To ensure that this scrutiny of ENSI is conducted in an orderly and systematic manner, the IAEA has developed a list containing about 2000 questions.