WORLD NUCLEAR ENERGY
The existing fleet
The nuclear energy story includes assets already supplying electricity.
Include the present, not only the pipeline
A new-project announcement can attract attention while existing plants continue to supply electricity. The IEA’s 2026 review reports that output rose in 2025, with contributions from restarts, performance and new units. These are different ways in which generation can change.
Take a whole-life view
Continued operation, modernization and life extension sit within country-specific oversight and plant-specific evidence. A vendor’s general service offer is not confirmation that a particular asset has received an extension.
For an educational comparison, record the asset, period, net capacity and generation boundary. For an actual project, use its competent authority and responsible operator as primary sources.
Sources: IEA26 · GVH. Checked 9 November 2026. Full context in Sources.