Swiss nuclear power plants

Runtime and long-term operation

Safety thanks to retrofitting

Swiss nuclear power plants can be operated for as long as they meet the legal safety requirements. The indefinite operating licenses combined with the requirements for the safety of nuclear facilities lead to continuous retrofitting and adaptation to the latest state of the art. The safety standards of Swiss nuclear power plants are therefore among the highest in the world. 

Modernizations and retrofits

Swiss nuclear power plants invest and modernize on an ongoing basis, operate an advanced ageing management system, are subject to a permanent retrofitting obligation and carry out a periodic safety review (PSR) every ten years. The concept of an unlimited operating license with the obligation to retrofit guarantees a high safety standard. This is reflected in the low susceptibility to faults and the high availability of Swiss nuclear power plants.

Security of supply thanks to long-term operation

Long-term operation is when a plant is operated for longer than was originally technically defined. The long-term operation of Swiss nuclear power plants is of the utmost importance for the country's energy supply, especially in the cold winter months. The existing plants produce around the clock and, together with hydropower, form the backbone of Switzerland's electricity supply. The operators of the Beznau, Gösgen and Leibstadt nuclear power plants ensure that nuclear energy will continue to make its contribution to a reliable supply of electricity in the coming decades through continuous upgrades.

Q&A - Runtime and long-term operation

A limited operating time for nuclear power plants:

  • reduces the incentives for comprehensive and long-term retrofitting;
  • makes personnel planning more difficult;
  • leads to claims for compensation because existing property is withdrawn and the investments made can no longer be amortized.

 

A time limit means in particular:

  • no increase in safety;
  • a threat to grid stability because the stabilizing factor of nuclear power plants is no longer present.

Thanks to careful and extensive retrofitting, Swiss nuclear power plants have almost reached the safety level of new plants - an internationally outstanding track record. The Swiss Federal Nuclear Safety Inspectorate (ENSI) regularly inspects the condition of the plants by law and can order upgrades or even the temporary decommissioning of the plant at any time if there are 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:

  • Comprehensive proof of safety must be provided for nuclear power plants that are to be operated for longer than 40 years. This verification must be updated at least every 10 years and should be provided as part of the periodic safety review (PSR).
  • With the retrofit concept, the operator must explain what measures he is taking to ensure the safe operation of his system beyond 40 years.