As of December 31, 2024, there were 252 nuclear reactors around the world that were 35 years old or older. This represented more than half of the number of operational nuclear reactors worldwide. At the time, 36 reactors worldwide were at least 50 years old.
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IAEA. (September 9, 2025). Number of nuclear reactors in operation worldwide as of December 2024, by age [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 21, 2026, from /statistics/272133/number-of-atomic-reactors-in-operation-worldwide-by-age/
IAEA. "Number of nuclear reactors in operation worldwide as of December 2024, by age." Chart. September 9, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 21, 2026. /statistics/272133/number-of-atomic-reactors-in-operation-worldwide-by-age/
IAEA. (2025). Number of nuclear reactors in operation worldwide as of December 2024, by age. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 21, 2026. /statistics/272133/number-of-atomic-reactors-in-operation-worldwide-by-age/
IAEA. "Number of Nuclear Reactors in Operation Worldwide as of December 2024, by Age." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 9 Sep 2025, /statistics/272133/number-of-atomic-reactors-in-operation-worldwide-by-age/
IAEA, Number of nuclear reactors in operation worldwide as of December 2024, by age ÌÇÐÄÆƽâ°æ, /statistics/272133/number-of-atomic-reactors-in-operation-worldwide-by-age/ (last visited July 21, 2026)
Number of nuclear reactors in operation worldwide as of December 2024, by age [Graph], IAEA, September 9, 2025. [Online]. Available: /statistics/272133/number-of-atomic-reactors-in-operation-worldwide-by-age/
