The guideline ENSI-A05 defines the quality and scope requirements regarding the plantspecific level 1 and level 2 Probabilistic Safety Analysis (PSA) for both internal and external events and covering all operating modes of the nuclear power plants. In addition, this guideline establishes the PSA requirements for other nuclear installations. The quality and scope requirements in […]
Since the catastrophic events at the Fukushima plant in Japan on 11 March 2011, there has been a fundamental shift in the way the public regards nuclear facilities in Switzerland. This means a change to some of ENSI’s responsibilities as its previous assessment of new build projects is no longer relevant.
On Wednesday evening, the Swiss Federal Nuclear Safety Inspectorate, ENSI issued directives on the EU Stress Test to operators of nuclear power plants in Switzerland. This is the 4th directive to be issued by ENSI since the accident in Fukushima.
On 20 January 2011 in Brugg, ENSI organised an international symposium on nuclear safety. This event, titled “Current and Future Challenges for Nuclear Power Regulators”, featured a programme of high-calibre speakers.
In 2009, as in previous years, ENSI rated the operation of the Swiss nuclear facilities as safe. Nevertheless, it was not an optimal year for nuclear safety. After systematic safety reviews at the Leibstadt and Mühleberg nuclear power plants, ENSI awarded both facilities a «good» rating. Both facilities were able to maintain the high safety […]
On January 1st 2009, HSK became ENSI, the Swiss Federal Nuclear Safety Inspectorate and at the same time the new body became independent of the Swiss Federal Office of Energy. However, the remit of the new regulatory body remains unchanged. ENSI continues to monitor ionising radiation and radioactivity in Swiss nuclear facilities and their immediate […]
Research into regulatory safety In terms of research into regulatory safety, ENSI awards and coordinates research projects designed to identify and develop current scientific knowledge and expertise and to make the results available to the regulatory process. This research is geared to current regulatory issues and those likely to be relevant in the foreseeable future. […]
This guideline applies to deep geological repositories as defined in Article 3 of the Nuclear Energy Act of 21 March 2003 (SR 732.1). It specifies the applicable protection objective and protection criteria and the requirements applying to a deep geological repository. It also sets out the details of the procedure to be followed for demonstrating […]
The three oldest Swiss nuclear power plants started operating in 1969 (Beznau-1), 1971 (Beznau-2) and 1972 (Mühleberg), respectively. This means that Beznau-1 will celebrate its 40th anniversary in 2009. Accordingly, long-term operation has been an issue in Switzerland for some years and, as long ago as 1991, the regulatory authority required all operators to have […]