What's Happening?
The United States holds the largest share of global nuclear electricity generation capacity, according to data from the International Atomic Energy Agency (IAEA) as of June 2025. The U.S. operates 94 nuclear reactors, contributing to 19% of its domestic electricity generation in 2024. This accounts for 30% of the global nuclear electricity output. The U.S. nuclear fleet operates at a high capacity factor of 92%, reflecting efficient management of generation outages. Other leading countries in nuclear capacity include France, China, Russia, and South Korea. France has the second-largest nuclear fleet, generating 65% of its electricity from nuclear power. China is rapidly expanding its nuclear capacity, with 28 reactors under construction, poised to surpass France's capacity.
Why It's Important?
The dominance of the United States in nuclear power generation underscores its strategic role in global energy security and climate change mitigation. Nuclear power is a critical component of the U.S. energy mix, providing a stable and low-carbon source of electricity. The high capacity factor of U.S. reactors indicates efficient operations, which is vital for maintaining energy reliability. As China expands its nuclear capabilities, the geopolitical landscape of energy production may shift, influencing international energy policies and collaborations. The U.S. must continue to innovate and invest in nuclear technology to maintain its leadership and address environmental challenges.
