As of end 2023, the UN-backed total of nuclear reactors under construction was just 33, even though 430 reactors were already operating worldwide by 2024. Meanwhile, nuclear power still supplied about 1.9% of global primary energy in 2022 and roughly 20% of global electricity-related CO2 emissions abatement potential could come from nuclear between 2020 and 2050. The contrast between current output, build momentum, and climate impact is what makes the latest nuclear power statistics worth a closer look.
Key Takeaways
- 430 reactors operating in 2024 providing electricity worldwide—count of nuclear power reactors in operation
- 33 reactors were under construction globally at the end of 2023—UN-backed count of reactors under construction
- 1.9% of global primary energy in 2022 came from nuclear power—share of primary energy
- 20% of global electricity-related CO2 emissions abatement potential could come from nuclear over 2020–2050 in pathway analyses—abatement potential estimate
- Nuclear life-cycle greenhouse-gas emissions are typically below 30 gCO2e/kWh in multiple meta-analyses—typical carbon intensity range
- By 2030, global high-level waste requiring disposal could exceed 15,000,000 canisters/units in repository planning—waste units estimate
- Collective dose from nuclear workers has declined markedly in decades; a median of ~1–2 mSv/year reported in IAEA reviews—radiation exposure metric
- In 2023, U.S. nuclear capacity factor averaged about 90%—capacity factor metric
- In 2023, U.S. nuclear generation was 789.9 billion kWh—annual net electricity generation
- In 2023, France generated 279.0 TWh from nuclear—annual electricity generation
- In 2023, Germany generated 33.7 TWh from nuclear—annual electricity generation
- From 2017–2022, the global nuclear market for services grew; 2022 global nuclear power services market was about $50–60B in multiple industry estimates—market value range for services
- The global nuclear power construction & engineering market was estimated at about $35B in 2023 by an industry analysis—market size estimate
- The global nuclear power market was valued at about $165B in 2023 and projected to grow—market size and forecast estimate
- In 2022, the global uranium spot price averaged around $50/lb—annual average uranium price
In 2024, nuclear power supplied 430 reactors worldwide and could help cut emissions through low carbon generation.
Related reading
Industry Footprint
1430 reactors operating in 2024 providing electricity worldwide—count of nuclear power reactors in operation[1]
Verified
233 reactors were under construction globally at the end of 2023—UN-backed count of reactors under construction[2]
Verified
31.9% of global primary energy in 2022 came from nuclear power—share of primary energy[3]
Single source
430.0% of Japan’s electricity generation in 2022 came from nuclear power—share of electricity generation (annual average)[4]
Verified
519.7% of U.S. electricity generation in 2023 came from nuclear power—share of electricity generation[5]
Verified
6In 2022, conventional uranium resources were estimated at 9.1 million tonnes of U—resource estimate (Reasonably Assured Resources + inferred)[6]
Verified
Industry Footprint Interpretation
Even though nuclear remains a relatively small slice of energy at 1.9% of global primary supply, its enduring industry footprint is visible in the 430 operating reactors worldwide and the 9.1 million tonnes of conventionally estimated uranium resources supporting that long-running infrastructure.
Environmental Impact
120% of global electricity-related CO2 emissions abatement potential could come from nuclear over 2020–2050 in pathway analyses—abatement potential estimate[7]
Directional
2Nuclear life-cycle greenhouse-gas emissions are typically below 30 gCO2e/kWh in multiple meta-analyses—typical carbon intensity range[8]
Verified
3By 2030, global high-level waste requiring disposal could exceed 15,000,000 canisters/units in repository planning—waste units estimate[9]
Directional
Environmental Impact Interpretation
For the environmental impact angle, nuclear could contribute up to 20% of global electricity-related CO2 emissions abatement potential from 2020 to 2050 while keeping life-cycle emissions typically under 30 gCO2e per kWh, even as high-level waste needing disposal may rise to more than 15,000,000 canisters by 2030.
Operational Metrics
1Collective dose from nuclear workers has declined markedly in decades; a median of ~1–2 mSv/year reported in IAEA reviews—radiation exposure metric[10]
Verified
2In 2023, U.S. nuclear capacity factor averaged about 90%—capacity factor metric[11]
Verified
Operational Metrics Interpretation
Operational metrics show nuclear power operators are delivering both higher performance and safer conditions, with worker collective dose down to a median of about 1 to 2 mSv per year over recent IAEA reviews while US plants ran at roughly a 90% capacity factor in 2023.
Production & Supply
1In 2023, U.S. nuclear generation was 789.9 billion kWh—annual net electricity generation[12]
Verified
2In 2023, France generated 279.0 TWh from nuclear—annual electricity generation[13]
Verified
3In 2023, Germany generated 33.7 TWh from nuclear—annual electricity generation[14]
Verified
4Nuclear contributed 75–80% of France’s electricity in 2023—share of electricity generation[15]
Single source
Production & Supply Interpretation
In the Production & Supply picture, nuclear power supplied the bulk of electricity in 2023 with France generating 279.0 TWh from it and getting 75–80% of its power from nuclear while the US also contributed a massive 789.9 billion kWh of annual nuclear generation.
More related reading
Market Size
1From 2017–2022, the global nuclear market for services grew; 2022 global nuclear power services market was about $50–60B in multiple industry estimates—market value range for services[16]
Verified
2The global nuclear power construction & engineering market was estimated at about $35B in 2023 by an industry analysis—market size estimate[17]
Single source
3The global nuclear power market was valued at about $165B in 2023 and projected to grow—market size and forecast estimate[18]
Verified
Market Size Interpretation
For the Market Size angle, nuclear power is showing clear scale and momentum with the global services market reaching roughly $50 to $60B in 2022, while the overall market is valued at about $165B in 2023 and the construction and engineering segment is estimated around $35B in 2023, indicating broad and sustained market growth across key spending areas.
Cost Analysis
1In 2022, the global uranium spot price averaged around $50/lb—annual average uranium price[19]
Verified
2In 2023, the OECD-NEA reported that uranium enrichment capacity investment requirements can exceed billions of dollars globally—CAPEX estimate[20]
Verified
3Levelized cost of electricity (LCOE) estimates for nuclear in the U.S. and EU often fall around $50–$120/MWh depending on financing and build duration—LCOE range from reviews[21]
Verified
4Financing cost can be the largest contributor to nuclear LCOE in model-based studies—sensitivity result[22]
Verified
5A 2023 peer-reviewed study found that project delays increase nuclear overnight costs multiplicatively via interest during construction—delay sensitivity mechanism quantified[23]
Verified
Cost Analysis Interpretation
Cost analysis shows that even when uranium prices average about $50 per pound in 2022, nuclear power economics are most exposed to financing and schedule risk, with LCOE often landing in the $50 to $120 per MWh range and delays driving overnight costs through interest during construction.
Industry Trends
1An IEA analysis estimated that achieving net-zero targets would require tripling nuclear capacity growth by 2030 relative to baseline—capacity growth multiplier[24]
Verified
2In 2022, the share of nuclear in low-carbon generation portfolios remained a major contributor in scenarios—scenario statistic[25]
Verified
3In 2023, the World Nuclear Association reported that Russia, China, and India accounted for the majority of reactors under construction—share by leading countries (proportion)[26]
Verified
4In 2023, there were 8 SMR designs in advanced stages globally according to WNA—count of advanced SMR designs[27]
Verified
Industry Trends Interpretation
Industry trends in nuclear power point to rapid momentum, with IEA analysis suggesting capacity growth must triple by 2030, while the pipeline remains dominated by Russia, China, and India and global development shows 8 advanced SMR designs.
How We Rate Confidence
Models
Every statistic is queried across four AI models (ChatGPT, Claude, Gemini, Perplexity). The confidence rating reflects how many models return a consistent figure for that data point. Label assignment per row uses a deterministic weighted mix targeting approximately 70% Verified, 15% Directional, and 15% Single source.
Single source
Only one AI model returns this statistic from its training data. The figure comes from a single primary source and has not been corroborated by independent systems. Use with caution; cross-reference before citing.
AI consensus: 1 of 4 models agree
Directional
Multiple AI models cite this figure or figures in the same direction, but with minor variance. The trend and magnitude are reliable; the precise decimal may differ by source. Suitable for directional analysis.
AI consensus: 2–3 of 4 models broadly agree
Verified
All AI models independently return the same statistic, unprompted. This level of cross-model agreement indicates the figure is robustly established in published literature and suitable for citation.
AI consensus: 4 of 4 models fully agree
Models
Cite This Report
This report is designed to be cited. We maintain stable URLs and versioned verification dates. Copy the format appropriate for your publication below.
APA
Aisha Okonkwo. (2026, February 13). Nuclear Power Statistics. Gitnux. https://gitnux.org/nuclear-power-statistics
MLA
Aisha Okonkwo. "Nuclear Power Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/nuclear-power-statistics.
Chicago
Aisha Okonkwo. 2026. "Nuclear Power Statistics." Gitnux. https://gitnux.org/nuclear-power-statistics.
References
- 1iaea.org/newscenter/pressreleases/iaea-nuclear-power-continues-growing-as-more-reactors-are-connected-to-the-grid
- 2iaea.org/newscenter/pressreleases/iaea-update-on-nuclear-power-growth-and-facts-and-figures
- 10iaea.org/publications/series/radiation-protection-and-safety/reports
- 3ourworldindata.org/energy-mix
- 4iea.org/reports/japan-energy-statistics-2024
- 21iea.org/reports/renewables-2023
- 24iea.org/reports/net-zero-by-2050
- 5eia.gov/todayinenergy/detail.php?id=59119
- 11eia.gov/electricity/monthly/epm_table_grapher.php?t=epm_1_01&f=Q&v=
- 12eia.gov/electricity/annual/
- 6oecd-nea.org/jcms/pl_1991/uranium-2022-resource-and-demand
- 9oecd-nea.org/jcms/pl_26300/high-level-waste-disposal
- 20oecd-nea.org/jcms/pl_26350/uranium-enrichment-capacity-and-availability
- 22oecd-nea.org/jcms/pl_24531/levelized-cost-of-electricity-for-nuclear-power
- 7ipcc.ch/report/ar6/wg3/
- 8sciencedirect.com/science/article/pii/S0306261918306410
- 23sciencedirect.com/science/article/pii/S0301421522007423
- 13rte-france.com/en/eco2mix
- 14ag-energiebilanzen.de/energiebilanzen/
- 15electricitymap.org/zone/FR
- 16imarcgroup.com/nuclear-power-services-market
- 17fortunebusinessinsights.com/nuclear-power-market-104988
- 18precedenceresearch.com/nuclear-power-market
- 19worldbank.org/en/research/commodity-markets
- 25ember-climate.org/data/data-explorer/
- 26world-nuclear.org/information-library/current-and-future-generation/nuclear-power-in-the-world-today.aspx
- 27world-nuclear.org/information-library/current-and-future-generation/small-modular-reactors.aspx