Aging Nuclear Fleet and Waste Legacy
270 of 440 operating nuclear reactors worldwide are over 30 years old, with an average fleet age now exceeding 32 years. 190 or more power reactors in 20 countries are in shutdown requiring decommissioning, yet only 17 have been fully decommissioned. No country has opened a permanent deep geological repository for high-level waste; Finland's Onkalo facility is closest. The IAEA is considering extending reactor operations beyond 60 years at PLiM 6 conference in 2026. Legacy waste is often stored in mixed, poorly characterized conditions. Decommissioning costs and timelines are consistently underestimated.
Probability
Horizon: 15y
Claims
No country has solved the permanent disposal problem for high-level nuclear waste despite 70 years of nuclear power generation.
This is factually verified. Finland's Onkalo repository has received construction and operating licenses but has not yet begun accepting spent fuel. Sweden's repository was approved in 2022 but construction is underway. All other countries rely on interim storage. The IAEA and national regulatory bodies confirm this status. Evidence Level A.
Indicators
- • 270 of 440 reactors over 30 years old
- • Average fleet age exceeding 32 years
- • 190+ reactors in shutdown requiring decommissioning
- • Only 17 reactors fully decommissioned worldwide
- • No permanent deep geological repository operational anywhere
- • IAEA convening conference on extending operations beyond 60 years
Interactions
Sources
- IAEA — Status and Trends in Nuclear Technology (accessed Fri Apr 03 2026 00:00:00 GMT+0000 (Coordinated Universal Time))
- IAEA — PLiM 6 Conference on Plant Life Management (2026) (accessed Fri Apr 03 2026 00:00:00 GMT+0000 (Coordinated Universal Time))
- World Nuclear Association — Reactor Database (accessed Fri Apr 03 2026 00:00:00 GMT+0000 (Coordinated Universal Time))