The global Small Modular Reactor market size 2026 was valued at USD 5.96 billion in 2025 and is projected to grow from USD 6.13 billion in 2026 to USD 8.77 billion by 2034, at a compound annual growth rate (CAGR) of 4.59% over the forecast period.
Small Modular Reactors are compact nuclear reactors — manufactured in a workshop, transported to operational sites, and deployed to generate a maximum output of 300 Megawatt electric (MWe). They are valued for their reliability, efficiency, and scalability, making them increasingly relevant to a world pivoting toward cleaner energy sources.
Key Growth Drivers
Rising Demand for Clean Energy: Governments worldwide are intensifying focus on renewable and low-carbon energy. Nuclear power via SMR systems is emerging as a viable complement to traditional renewables, with market share continuously growing within the global reactor landscape.
Industrial Sector Adoption: Energy consumption across power generation, utilities, and data centers is surging. Light water reactors have become widely used across industrial applications, driven by their high efficiency and the global push toward more cost-effective sustainable energy.
Data Centers and AI Infrastructure: Data centers already account for over 2% of global electricity consumption (as per the IEA), with that figure potentially doubling by 2026. The rapid expansion of AI and digital infrastructure is directly boosting interest in SMR technologies to stabilize and sustain electricity supply.
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Market Restraints & Challenges
Licensing Complexity: The absence of standardized licensing frameworks poses a significant obstacle. Varying regulations around design, manufacturing, certification, and deployment costs continue to slow SMR commercialization.
High Initial Costs: Project costs have shifted by over 100% from initial estimates in some cases, driven by construction barriers, material prices, labor, inflation, and evolving technological requirements. Of the four SMRs currently operational globally — two in Russia, one in China, and one in Japan — all exceeded original budget projections.
Segmentation Highlights
By Module: The multi-module segment dominates with a 64.35% market share in 2026, as these systems offer operational flexibility and scalability. The single-module segment is the fastest-growing, driven by grid, heating, and hydrogen production applications.
By Power Output: The 101 to 200 MW segment leads with a 44.61% share in 2026, owing to high industrial output demands. Reactors under 100 MW are the fastest-growing, serving commercial buildings, desalination, and heat generation.
By Technology: Water-cooled SMRs dominate with a 72.04% market share in 2026, prized for their wide operating temperature range and thermal efficiency. Gas-cooled reactors are the fastest-growing due to their compact and modular design.
By Application: The industrial segment leads with 40.57% share in 2026, covering heating, petrochemicals, and steelwork. Power generation is the fastest-growing application. The desalination segment is expected to register a CAGR of 6.14%, especially driven by demand in Russia and China.
Regional Insights
Russia is the largest regional market, valued at USD 2.82 billion in 2024, operating twin 35 MW reactors for power generation and industrial use, with plans to expand SMR applications to remote areas and emergency power.
China is the second-largest market at USD 2.09 billion in 2025 (CAGR: 3.87%), currently operating a 200 MW SMR project and aggressively investing in nuclear technology backed by strong state policy.
Japan is ramping up nuclear power adoption, targeting a 20% share of national energy supply from nuclear sources by 2040, up from 8.5% in 2023, creating favorable conditions for SMR deployment.
Rest of the World — including the U.S., U.K., Canada, and Australia — are actively developing SMR projects ranging from 35 MW to 300 MW. The U.S. remains the world's largest producer of nuclear energy, contributing around 30% of global nuclear electricity.
Key Industry Developments
- India (Feb 2025): Announced investment in five SMRs to be operational by 2033, targeting 100 GW nuclear capacity by 2047.
- Google (Nov 2024): Signed an agreement to develop a fleet of SMRs to power AI data centers, with the first reactor planned for 2030.
- Amazon (Oct 2024): Partnered with Energy Northwest to develop advanced SMRs to address growing energy demands.
- Sweden (Jan 2025): The ANItA nuclear project identified suitable SMR designs for electricity generation in Sweden.
Competitive Landscape
The global SMR market is highly fragmented. Key players include NuScale Power, Westinghouse Electric Company, Babcock International Group, Holtec International, Rolls-Royce plc, Oklo Inc., ThorCon Power, Terrestrial Energy, and Assystem, among others. Companies are focused on technological advancement to meet regulatory requirements and improve energy efficiency.