Long-term operation

A limited operating time for nuclear power plants:

• reduces the incentives for comprehensive, long-term retrofitting;
• makes personnel planning more difficult;
• leads to claims for compensation, since existing assets are withdrawn and the investments made can no longer be recouped.

In particular, a time limit means:

• no increase in safety,
• a threat to grid stability, because the stabilising effect of nuclear power plants is lost.

Thanks to careful and extensive retrofitting, Switzerland's nuclear power plants have almost reached the safety standards of new plants - an outstanding track record by international standards. The Swiss Federal Nuclear Safety Inspectorate (ENSI) is required by law to carry out regular inspections of the condition of the facilities and can at any time order retrofitting measures or even the temporary decommissioning of the facility if there are any doubts about safety.

The proof of safety required for long-term operation is regulated by the Swiss Federal Nuclear Inspectorate (ENSI). The following points, among others, are set out in the corresponding directive:

• Nuclear power plants that are to be operated for more than 40 years must provide comprehensive proof of safety. This proof must be updated at least every 10 years and should be provided as part of the periodic safety review (PSR).
• As part of the retrofitting plan, the operator must explain the measures it is taking to ensure the safe operation of its facility beyond 40 years.

• Open-ended licences lead to continuous retrofitting.
• Open-ended licenses encourage a mindset of constant questioning. Every nuclear power plant must be safe for the long term at all times.
• Open-ended licences favour staff development and the recruitment of new staff.

Yes, because safety is at the heart of this system. The protection of people and the environment through safe nuclear facilities is a concern shared by all. The recognised high level of safety at Swiss nuclear power plants is based on:

• a robust, state-of-the-art power plant design;
• responsible operation by qualified personnel;
• a reliable, stable, and consistently implemented ageing management system. 

Swiss nuclear energy legislation does not impose any limits on the operating life of nuclear power plants. However, an open-ended operating licence does not mean that operations will continue indefinitely. A nuclear power plant may operate as long as it meets the statutory safety requirements. The operator is responsible for the safety of its plant. The regulatory authority, the Swiss Federal Nuclear Safety Inspectorate (ENSI), continuously monitors the facilities and may order a shutdown if safety can no longer be guaranteed.

Yes, in US and Belgium, for example, limits on the period of operation of nuclear power plants are dictated by policy.