Installed nuclear capacity reached 409.90 GW in 2026 and is projected to climb to 425 GW by 2031, a 0.73% CAGR that masks a sharp split between slow large-reactor builds and fast-growing advanced and small modular designs [S3].
Pressurized light-water technology dominates the global installed base at 72.8% of capacity in 2025, while fast breeder reactors are forecast to grow at 21.4% CAGR through 2031, signaling where the next OEM revenue pool sits [S3]. North America carries 36.2% of the nuclear power market by region in 2026, and the United States alone produces about 30% of worldwide nuclear electricity [S2][S4].
Reactor Technology Split: PWR Still Owns the Fleet
Pressurized Water Reactors and Pressurized Heavy Water Reactors together hold 39.3% of the 2026 market share by reactor type in Coherent Market Insights' segmentation, while Mordor Intelligence puts pressurized light-water technology alone at 72.8% of installed capacity in 2025 [S2][S3]. The gap reflects how each report slices PWR and PHWR categories, but both confirm light-water designs as the OEM revenue backbone.
Medium-sized units in the 500–1,000 MWe class held 49.2% of global installed share in 2025, whereas reactors below 500 MWe, the SMR band, are forecast to grow at 20.1% CAGR to 2031 [S3]. Low-enriched uranium fueled 87.5% of 2025 capacity, with high-assay low-enriched uranium (HALEU) on track for a 10.9% CAGR, a shift that benefits fuel-cycle suppliers more than reactor OEMs in the near term [S3].
Utilities and independent power producers represented 87.7% of 2025 demand, leaving industrial process-heat and petrochemical users as a 12% CAGR growth lane through 2031 [S3]. For buyers specifying power distribution equipment for new SMR sites, that demand mix points to smaller pad-mount switchgear ratings than legacy 1,000 MWe unit feeds.
Reactor OEMs and Equipment Vendors
The named OEMs in the 2026 nuclear power plant equipment market include Alstom SA, BWX Technologies, and the wider GE-Hitachi Nuclear Energy ecosystem that surfaces in both the equipment and reactor vendor rosters [S3][S6]. Westinghouse designed the first fully commercial PWR (Yankee Rowe, 250 MWe, 1960) and General Electric developed the first commercial boiling water reactor (Dresden 1, 250 MWe, 1960), two firms that still anchor the US supply chain [S4].
On the US operating side, Exelon Corporation is identified by IBISWorld as the company holding the largest market share in US Nuclear Power Generation [S5]. The US fleet operates 94 reactors with a combined 96,952 MWe capacity across 28 states, and 41 reactors have been shut down, totaling 20,017 MWe of retired capacity [S4]. For context, an industrial pump spec sheet used in plant auxiliary service water sees roughly 1–3 reactor-equivalents of pump demand retired per year against a much smaller commissioning rate.
Country and Regional Capacity Map
Europe held 39.1% of installed nuclear capacity in 2025, with Asia-Pacific the fastest-growing region at 7.2% CAGR through 2031, and the equipment market itself saw Asia-Pacific take 35.3% of 2025 global revenue share [S3][S6]. North America follows at 36.2% of the 2026 nuclear power market by regional segmentation, consistent with the US operating fleet of 94 reactors [S2][S4].
The US produced 816 TWh of nuclear electricity in 2024, equal to 18% of total US electrical output and more than 40% of the country's low-carbon electricity [S4]. Since 2001, the US fleet has averaged above 90% capacity factor, a level last seen as a 94% record in 2019 [S4]. Sites that maintain this duty cycle lean heavily on power meter accuracy classes below 0.2S for revenue metering across the switchyard.
Policy and Demand Drivers Shaping the Mix
France's 2024 energy law mandates six new EPR2 units, the United Kingdom's Great British Nuclear program targets 24 GW by 2050, and US production tax credits under the Inflation Reduction Act improve project economics in deregulated markets [S3]. In May 2025, US executive orders set a target to quadruple US nuclear capacity to 400 GWe by 2050 and accelerate near-term advanced reactor deployment [S4].
Mordor Intelligence attributes a 0.15% upward impact on forecast CAGR to clean baseload demand, with lifetime extension and uprate programs adding another 0.08%, SMR commercialization 0.12%, industrial process-heat 0.10%, nuclear hydrogen 0.09%, and data-center or marine applications 0.11% [S3]. The Trump executive orders sit alongside the August 2022 Inflation Reduction Act, which provides investment and tax incentives for both large existing plants and advanced reactors, plus HALEU and hydrogen production [S4].
For comparison, six driver categories line up against forecast impact: clean baseload +0.15% (global, medium term), SMR commercialization +0.12% (North America, UK, Eastern Europe, Middle East, long term), data-center/marine +0.11% (North America, Europe, Asia-Pacific tech hubs, medium term), industrial process-heat +0.10% (Europe, China, North America industrial corridors, medium term), nuclear hydrogen +0.09% (North America, Europe, Japan, Middle East, long term), and lifetime extension +0.08% (North America, Europe, Russia, short term) [S3].
Market Size Divergence Across 2026 Reports
Three 2026 reports produce different headline numbers because they measure different things: Coherent Market Insights values the nuclear power market at USD 38.30 Bn in 2026 growing to USD 51.43 Bn by 2033 at 4.3% CAGR [S2]; Market Data Forecast puts 2033 revenue at USD 45.89 Bn at 2.93% CAGR [S8]; and Mordor Intelligence measures installed capacity at 409.90 GW in 2026 growing to 425 GW by 2031 at 0.73% CAGR [S3]. The nuclear reactor construction sub-market is a smaller slice, valued at USD 7.73 Bn in 2025 and growing to USD 9.51 Bn at 2.47% CAGR through 2034 [S7].
Asia-Pacific took 35.3% of nuclear power plant equipment revenue in 2025, ahead of all other regions in the equipment segment even as Europe leads in installed capacity share [S3][S6]. This split matters for OEM capacity planning: the equipment supply chain pulls toward Asia-Pacific buyers while the operating fleet still earns in Europe and North America.
Constraints and Sourcing Risks for Buyers
Russia-Ukraine conflict and resulting sanctions have strained nuclear fuel supply chains, raising uranium procurement costs and causing delays that hit operational budgets [S2]. On the technology side, HART protocol and Foundation Fieldbus both appear in nuclear plant I&C retrofits, but the two are not interchangeable: HART is FSK layered on a 4–20 mA analog loop while Foundation Fieldbus is a fully digital bus, so spare-parts inventories and engineering training must follow the existing standard on each unit.
Pressurized Water Reactors leverage proven technology, widespread adoption, and solid safety performance to deliver large-scale power, while PHWRs use natural uranium, optimize neutron economy, and enable on-power refueling, which appeals to nations lacking enrichment facilities [S2]. Industrial buyers who want process-heat service from a nuclear source are the second demand pillar alongside utilities, drawn by the need for high-temperature, zero-carbon heat [S3].
Buyers sourcing Chinese-made auxiliary equipment for both new builds and retrofits should expect to see motor spec sheets structured around the patterns covered in 2026 Electric Motor Procurement: Spec, Supplier, and TCO Playbook, and plant-level power distribution layouts will increasingly follow the rack-and-cabinet conventions described in Sourcing Electric Motors from China: 2026 Buyer Spec Playbook.
Trackable Signals for the Rest of 2026
Three signals to watch: (1) whether the US 400 GWe by 2050 target produces new COLA filings beyond the 94 currently operable reactors before year-end, (2) HALEU fuel-cycle supply contracts converting the 10.9% CAGR forecast into signed offtake volumes, and (3) the first EPR2 unit concrete pour at the Penly site, which would confirm France's six-unit mandate is moving from paper to procurement [S2][S3][S4].