High earthquake protection of Beznau NPP confirmed

The Swiss Federal Nuclear Safety Inspectorate ENSI has published its report on the assembly deviation on two of six emergency diesel generators at the Beznau nuclear power plant (KKB). ENSI concludes that KKB was safe and protected against earthquakes despite the assembly deviation.

As a consequence of Fukushima, ENSI increased the earthquake protection requirements for all Swiss nuclear power plants in 2012. At that time, KKB provided the necessary verifications with a positive result. In 2020, however, the assembly deviations on the emergency diesels were discovered. As a result, it only became clear in retrospect that the formal requirements had not been fully met in the event of an earthquake, which is to be expected only once every 10,000 years. This resulted in a formal deviation during two months (April and May 2012). With the commissioning of two retrofitted diesel generators in June 2012, the requirements were met again according to the authority.

Thanks to various retrofits and other measures, ENSI certifies that the KKB has a very high level of earthquake safety. Over the past decades, Axpo has invested around CHF 2.5 billion in the reliability and safety of the plant. During the months of April and May 2012, the level of earthquake protection was the same as in the months and years before.

In the meantime, KKB has analysed the reasons for the non-detection of the assembly deviation and various measures are being implemented. For example, additional checks are being carried out on ongoing projects to determine whether the components supplied correspond to the design. In addition, existing processes are being analysed and adjusted if necessary.

Axpo Holding AG

Corporate Communications

medien@axpo.com

T 0800 44 11 00 (Schweiz) 
T +41 56 200 41 10 (International)

(08.00 - 17.30)

More media releases

Show all

Solar energy 18.06.2024

Axpo starts work on 20 MWp solar power plant in northern Italy

Axpo has taken a significant step towards expanding its solar energy initiatives in Italy by commencing construction on a 20 MWp ground-mounted solar power plant, it was announced today. Located at Manzano, in the Friuli Venezia Giulia region of northern Italy, the project ‘Parco Molini’ marks a key development in Axpo's renewable energy strategy across Europe.

Read more

Company 29.05.2024

Axpo strategy continues to deliver results

In the first six months of the 2023/24 financial year (1 October 2023 to 31 March 2024), the Axpo Group further strengthened its position as an international energy leader by continuing to successfully implement its three-pillar corporate strategy. As Switzerland’s largest producer of electricity, Axpo made a significant contribution to a secure energy supply system, advancing the energy transition by building renewables while successfully growing its customer business with energy trading solutions.

Read more

International business 02.05.2024

Axpo and Ineos Oxide sign corporate PPA in Belgium

Axpo and Ineos Oxide, a leading chemicals manufacturer in Belgium, have signed a corporate power purchase agreement (PPA), it was announced today. The long-term deal covers 12 megawatts of renewable energy, making an important contribution to the green transition in the Antwerp port area.

Read more