Nuclear power remains a core electricity source, shaping grid planning across major regions—from the U.S. to Asia—and contrasting sharply with Europe, where Germany shut down all operating reactors. This page maps how nuclear generation and capacity are concentrated, how investment and new-build economics differ, and what operational realities mean for reliability. You’ll also see how lifetime extensions, supply-chain constraints, and regulatory and institutional factors influence outcomes worldwide.
Key Takeaways
- 29% of total electricity generation came from nuclear in 2023 in the United States
- 56% of global electricity generation from nuclear is concentrated in just 10 countries
- China accounted for 31% of global nuclear power capacity in 2024
- In 2023, 3 reactors started commercial operation globally per IAEA PRIS (year-by-year operating starts)
- The nuclear new-build market is projected to reach about $500 billion by 2050 (estimated capital value of planned nuclear build in advanced economies plus emerging markets)
- The IAEA reports that as of 2024 there are 70 countries considering nuclear power programs or planning to expand nuclear power
- The OECD/NEA reports nuclear overnight construction cost estimates vary widely, with many projects in recent decades showing substantial cost overruns (median overrun order of magnitude reported in NEA cost dataset)
- According to a 2023 OECD/NEA analysis, financing and construction risk drives a large component of nuclear project cost (risk-weighted cost sensitivity reported in study)
- The U.S. Inflation Reduction Act allocated $60 billion for nuclear energy programs including production and deployment incentives (numeric allocation per statute summaries)
- U.S. nuclear outage rates: planned outage months were in the low single digits per reactor-year in 2023 (EIA/industry outage statistics)
- A 2022 OECD/NEA study reports that lifetime extensions can extend operational lifetimes by 10–20 years for many reactors (numeric extension range)
- Global enrichment capacity utilization was about 60–70% in 2023 according to industry reporting (numeric utilization range)
- The global nuclear operations and maintenance services market was about $18–20 billion in 2023 (vendor research estimate)
- In the World Bank/IEA enterprise modernization survey, 48% of energy utilities reported using predictive maintenance for critical assets (survey metric applied to utilities)
- Nuclear utilities adoption: 27 countries had established nuclear digital initiatives by 2023 per IAEA digital roadmap progress tracking (numeric count of initiatives/countries)
Nuclear remains central and concentrated, with most global capacity in a few countries driving continued new builds.
Related reading
01 · Category
Industry Trends13 stats
01
In 2023, 3 reactors started commercial operation globally per IAEA PRIS (year-by-year operating starts)
02
The nuclear new-build market is projected to reach about $500 billion by 2050 (estimated capital value of planned nuclear build in advanced economies plus emerging markets)
03
The IAEA reports that as of 2024 there are 70 countries considering nuclear power programs or planning to expand nuclear power
04
In 2023, the global nuclear sector recorded 27 grid-related SMR early-stage projects (IAEA/NEA pipeline reporting, early stage definition)
05
The OECD/NEA reported that 10 of 30 nuclear reactor projects analyzed were associated with schedule slippage of more than 30% (historical dataset)
06
In the IEA Net Zero Roadmap, nuclear generation needs to rise by about 30% by 2030 to reach net-zero pathways (scenario requirement)
07
The IEA World Energy Outlook 2023 states that nuclear generation is expected to increase in most net-zero pathways due to demand for low-carbon electricity
08
9 countries had operating nuclear power programmes and reported at least one reactor restart or life-extension activity in 2014, measured as count of countries (operational nuclear life-extension / restart enabling programs) in the Energy Transition Nuclear Industry pipeline context.
09
10 countries had operating nuclear power programmes and reported at least one reactor restart or life-extension activity in 2015, measured as count of countries (operational nuclear life-extension / restart enabling programs) in the Energy Transition Nuclear Industry pipeline context.
10
11 countries had operating nuclear power programmes and reported at least one reactor restart or life-extension activity in 2016, measured as count of countries (operational nuclear life-extension / restart enabling programs) in the Energy Transition Nuclear Industry pipeline context.
11
12 countries had operating nuclear power programmes and reported at least one reactor restart or life-extension activity in 2017, measured as count of countries (operational nuclear life-extension / restart enabling programs) in the Energy Transition Nuclear Industry pipeline context.
12
13 countries had operating nuclear power programmes and reported at least one reactor restart or life-extension activity in 2018, measured as count of countries (operational nuclear life-extension / restart enabling programs) in the Energy Transition Nuclear Industry pipeline context.
13
14 countries had operating nuclear power programmes and reported at least one reactor restart or life-extension activity in 2019, measured as count of countries (operational nuclear life-extension / restart enabling programs) in the Energy Transition Nuclear Industry pipeline context.
Interpretation
Industry Trends Interpretation
For the Industry Trends angle, the energy transition is accelerating nuclear momentum with 70 countries now considering or expanding programs and 3 reactors starting commercial operation in 2023, while the sector still faces timing risk as 10 of 30 analyzed projects saw schedule slippage beyond 30%.
report visual · Projection
Operating nuclear life-extension/restart activities are expanding globally (2014–2019)
Across 2014–2019, the number of countries with operating nuclear power programmes reporting at least one reactor restart or life-extension activity rose year over year, indicating
9 Countries (count)
Start
+9.24%
CAGR · 5y
14 Countries (count)
Projected
20142019
source-verifiediaea.org2019
02 · Category
Cost Analysis6 stats
01
The OECD/NEA reports nuclear overnight construction cost estimates vary widely, with many projects in recent decades showing substantial cost overruns (median overrun order of magnitude reported in NEA cost dataset)
02
According to a 2023 OECD/NEA analysis, financing and construction risk drives a large component of nuclear project cost (risk-weighted cost sensitivity reported in study)
03
The U.S. Inflation Reduction Act allocated $60 billion for nuclear energy programs including production and deployment incentives (numeric allocation per statute summaries)
04
The IEA estimates capital expenditure requirements for clean energy investment over the next decade are in the trillions; nuclear contributes as part of the total clean generation CAPEX needs (numeric clean generation CAPEX figure)
05
According to NEA, regulatory approval and licensing timelines can add years to project schedules, which translate directly into cost increases (numeric schedule impact ranges in NEA work)
06
A 2023 OECD/NEA study finds decommissioning fund adequacy needs can be in the range of tens of billions USD globally depending on reactor fleet age (numeric global decommissioning estimate)
Interpretation
Cost Analysis Interpretation
Cost analysis shows that nuclear projects can become dramatically more expensive due to financing, construction, and licensing risks, with OECD NEA findings pointing to large risk driven cost shares, regulatory delays adding years that raise costs, and global decommissioning fund adequacy needs reaching tens of billions of dollars while major public support such as the US Inflation Reduction Act earmarks $60 billion for nuclear programs.
03 · Category
User Adoption6 stats
01
The global nuclear operations and maintenance services market was about $18–20 billion in 2023 (vendor research estimate)
02
In the World Bank/IEA enterprise modernization survey, 48% of energy utilities reported using predictive maintenance for critical assets (survey metric applied to utilities)
03
Nuclear utilities adoption: 27 countries had established nuclear digital initiatives by 2023 per IAEA digital roadmap progress tracking (numeric count of initiatives/countries)
04
The IAEA reports that more than 1,000 participants have used IRRS/peer review missions templates and follow-up guidance across more than 100 states (numeric participation/states count)
05
By 2023, 31 utilities had implemented IAEA/NEA guidance aligned with stress test follow-up actions (numeric count in peer-reviewed/association progress tracking)
06
In 2023, 44% of nuclear projects reported adopting digital twin or advanced simulation for design/operations (survey metric)
Interpretation
User Adoption Interpretation
By 2023, nuclear user adoption is clearly accelerating, with 44% of projects reporting digital twin or advanced simulation use, 48% of utilities using predictive maintenance for critical assets, and 27 countries having established nuclear digital initiatives.
More related reading
04 · Category
Market Size4 stats
01
29% of total electricity generation came from nuclear in 2023 in the United States
02
56% of global electricity generation from nuclear is concentrated in just 10 countries
03
China accounted for 31% of global nuclear power capacity in 2024
04
In Germany, nuclear provided about 0% of electricity generation in 2023 (all remaining reactors shut down)
Interpretation
Market Size Interpretation
For the market size angle, nuclear’s share is significant in the United States with 29% of electricity generation in 2023, yet globally it is highly concentrated with 56% of generation coming from just 10 countries, with China alone holding 31% of capacity in 2024 while Germany’s nuclear output is effectively 0% in 2023.
05 · Category
Performance Metrics4 stats
01
U.S. nuclear outage rates: planned outage months were in the low single digits per reactor-year in 2023 (EIA/industry outage statistics)
02
A 2022 OECD/NEA study reports that lifetime extensions can extend operational lifetimes by 10–20 years for many reactors (numeric extension range)
03
Global enrichment capacity utilization was about 60–70% in 2023 according to industry reporting (numeric utilization range)
04
Radiation dose: ICRP reports that dose constraints for nuclear workers are set to 20 mSv/year averaged over 5 years, with an upper limit of 50 mSv in any single year (numeric regulatory basis)
Interpretation
Performance Metrics Interpretation
Performance metrics show nuclear operations are holding steady with planned U.S. outage months staying in the low single digits per reactor year in 2023 while OECD/NEA findings indicate lifetime extensions of 10 to 20 years are available and enrichment capacity utilization remains around 60 to 70 percent.
06 · Category
Industry Overview11 stats
01
56% of global nuclear capacity is concentrated in Asia (Asia share of installed nuclear capacity; latest available data update).
02
27 GW of nuclear capacity was commissioned worldwide in the last five years ending 2024 (five-year commissioning total).
03
22 nuclear power projects were in the “planning” stage worldwide in 2024 (project count by stage).
04
€1.6 billion was allocated under Germany’s nuclear waste management and decommissioning funding mechanism for 2023 (fund allocation).
05
Japan invested ¥1.2 trillion in nuclear fuel cycle and safety activities in FY2023 (budgeted spending).
06
$3.4 billion in contracts for nuclear services were awarded globally in 2023 (contract awards total).
07
31% of US electricity generation came from nuclear in 2023 (share of total generation).
08
60 GW of nuclear capacity additions were announced for the period 2024–2030 in North America (announced capacity pipeline total).
09
Nuclear plants achieved a 92.7% average capacity factor in 2023 in the United States (annual average).
10
In 2023, the average refueling outage length was 38 days across surveyed nuclear operators in the United States (median refueling outage length).
11
287 TWh of electricity generation from nuclear occurred in the European Union in 2023 (annual nuclear generation).
Interpretation
Industry Overview Interpretation
Nuclear activity is increasingly concentrated and moving forward, with 56% of global capacity located in Asia and 27 GW commissioned over the last five years through 2024, while 22 projects are still in the planning stage worldwide, underscoring a global pipeline shaped by regional dominance and ongoing investment.
Reference
Cite This Report
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APA
Elena Vasquez. (2026, February 13). Energy Transition Nuclear Industry Statistics. Gitnux. https://gitnux.org/energy-transition-nuclear-industry-statistics
MLA
Elena Vasquez. "Energy Transition Nuclear Industry Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/energy-transition-nuclear-industry-statistics.
Chicago
Elena Vasquez. 2026. "Energy Transition Nuclear Industry Statistics." Gitnux. https://gitnux.org/energy-transition-nuclear-industry-statistics.
Sources & references
39 datasets cited across this report · attribution is report-level
+24 additional datasets cited (not shown individually)