U.S. nuclear fleet ages as China adds 34 GW in a decade

September 5, 2026 at 03:00 AM2 min

This digest was compiled by AI from multiple sources — links to the originals are below.

The United States operates 96 commercial nuclear reactors with an average age of 44 years, while China added 34 gigawatts of nuclear capacity in the past decade. China is on track to overtake France and the United States as the world's largest nuclear power producer within five years. The U.S. added only one plant, Georgia's Plant Vogtle, which came online years late and billions over budget.

Key Facts

The United States has 96 operating commercial nuclear reactors in 57 power plants across 28 states.
The average reactor age in the United States is 44 years, while most reactors were initially licensed for 40 years.
China added 34 gigawatts of nuclear capacity in the past decade, while the U.S. added only one plant, Georgia's Plant Vogtle.
China is on track to overtake France and the United States as the world's largest nuclear power producer within five years.
Plant Vogtle came online in 2024, years late and billions of dollars over budget.

Aging U.S. Fleet

All but two of the nation's nuclear reactors are Gen II models, constructed before the year 2000. The average reactor age in the United States is 44 years, exceeding the original 40-year license period for most units. In the past decade, the United States added just one nuclear power plant, Georgia's Plant Vogtle.

China's Rapid Expansion

China added 34 gigawatts of nuclear capacity in the same period. China is on track to overtake France and the United States to become the world's largest nuclear power producer within five years. Damien Ma, energy lead analyst for Gavekal Technologies, wrote that China will have the world's most dynamic nuclear industry through 2035. Ma noted that construction efficiencies allow China to build a new plant in about six years, compared with more than a decade for the latest Vogtle reactors.

Cost and Regulatory Barriers

Nuclear power plants require enormous up-front capital, and megaprojects tend to go over deadline and over budget. Plant Vogtle came online in 2024, years late and billions of dollars over budget. The National Interest reported that investors are reluctant to invest in nuclear projects during the development phase, which can become 'bet the company' decisions.