The main aim of ENSI’s international cooperation is the continuous improvement of nuclear safety and security, and the strengthening of nuclear oversight in Switzerland. This is to be achieved through active participation in the exchange of international regulatory information and experience, through international review missions and the support of other federal bodies.
Furthermore, ENSI’s international activities should contribute to the continuous improvement of nuclear safety and security, and to the strengthening and independence of nuclear oversight at a global level.
As a neutral state, Switzerland is in a good position to initiate changes, although with only five commercial reactors it is not one of the largest nuclear energy nations in the world.
For this reason, ENSI is heavily involved in the committees of the International Atomic Energy Agency of the United Nations (IAEA), in the working groups of the Nuclear Energy Agency (NEA) of the Organisation for Economic Cooperation and Development (OECD), in the European Nuclear Security Regulators’ Association (ENSRA) and in particular in the Western European Nuclear Regulators’ Association WENRA.
International cooperation allows ENSI to follow developments in international safety regulations and foreign supervisory authorities and thus to be up-to-date with the latest scientific and technological developments, as well as offering an opportunity to shape and influence them.
Strategy International Activities
News
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ENSI and the Brazilian Nuclear Regulatory Authority ANSN agree on enhanced bilateral cooperation
ENSI and the Brazilian nuclear regulatory authority ANSN decide to intensify their exchange of information and experience. During a two-day visit on 21 and 22 September 2026, both sides signed a Memorandum of Understanding.
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IAEA General Conference 2026: focus on the rapid expansion of nuclear energy and regulatory change
ENSI was part of the Swiss delegation at the IAEA General Conference. Together with other regulatory authorities, ENSI advocated for the maintenance of high safety standards. This is all the more important in a context characterised by the rapid global growth in the use of nuclear energy.
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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.
Background articles
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Ten Years on from Fukushima (6/6): Conclusions
The disastrous accident in Fukushima Daiichi occurred exactly ten years ago, on 11 March 2011. In the last few weeks, our article serie has highlighted the causes, the sequence and the effects, as well as describing the conclusions that we have been able to draw from the accident.
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Ten years on from Fukushima, the ENSI Board still holds that safety has priority over political or economic interests
Where there are conflicts of interest between politics, safety and profitability, safety must always take priority. This is one of the most important lessons learnt from the Fukushima nuclear accident.
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‘Switzerland is regarded as very reliable in nuclear matters’ – a commentary by former Federal Councillor Doris Leuthard
At the time of the fateful accident in Fukushima, Doris Leuthard was head of the Federal Department of the Environment, Transport, Energy and Communications (DETEC). To commemorate the tenth anniversary of the nuclear disaster, the former Federal Councillor explains why it was essential to provide political support for nuclear safety after the accident.