U.S. Nuclear Capacity Expansion Set To Unlock $57B In Investment Through 2035, Fueled By Uprates, Smrs And Reactor Restarts
Dublin, Sept. 15, 2026 (GLOBE NEWSWIRE) -- "U.S. Nuclear Capacity Expansion Market: $57B Investment Outlook Across Uprates, SMRs & Restarts (2025-2035)" has been added to ResearchAndMarkets.com's offering.
The U.S. nuclear capacity expansion market is projected to represent an estimated $57 billion investment opportunity through 2035 as the industry enters its first multi-pathway growth cycle in four decades. A new market intelligence report compares the primary pathways expected to drive U.S. nuclear energy capacity additions: nuclear fleet uprates, reactor restarts and small modular reactors (SMRs). New large-scale reactor construction is also assessed as part of the longer-term market outlook.
The report evaluates each nuclear expansion pathway according to capital cost per kilowatt, development timeline, regulatory readiness and evidence quality. Its findings indicate that nuclear fleet uprates could deliver 39% to 50% of projected near-term capacity additions while accounting for less than one-quarter of total capital expenditure. Based on demonstrated project costs, uprates may provide a two- to fourfold capital efficiency advantage over SMR deployment at current projected first-of-a-kind costs.
A central finding is the evidence imbalance influencing nuclear energy investment decisions. The National Renewable Energy Laboratory Annual Technology Baseline incorporates 35 bottom-up cost estimates for advanced reactor designs, despite the absence of completed commercial SMR projects in the United States. By comparison, open-source research provides limited systematic analysis of nuclear uprate costs, even though the U.S. Nuclear Regulatory Commission (NRC) has approved 172 uprate projects that collectively added approximately 8 GW of generating capacity over five decades.
The U.S. nuclear capacity expansion market is assessed across three investment scenarios. The conservative scenario estimates $24 billion to $34 billion in capital expenditure supporting approximately 7 GW of capacity. The base scenario projects $45 billion to $70 billion for 12 GW, while the optimistic scenario forecasts $72 billion to $123 billion for up to 18 GW.
Market estimates are based on announced nuclear projects, NRC pipeline data, federal targets, Reuters Events and Bloomberg Intelligence analysis, and International Energy Agency projections. The assessment also incorporates Executive Order 14302, issued in May 2025, which directs the U.S. Department of Energy to facilitate 5 GW of nuclear power uprates by 2030.
Key Report Findings
- Nuclear uprates offer strong capital efficiency: Fleet uprating is projected to provide 39% to 50% of near-term U.S. nuclear capacity additions while requiring less than 25% of total pathway investment. Expansion costs vary significantly by pathway: Nuclear capacity expansion costs span an estimated 20-fold range, from lower-cost uprate projects to first-of-a-kind SMR deployments. The report compares completed uprates, announced reactor restarts and SMR projects by cost and evidence tier. Corporate buyers are adopting multi-pathway procurement strategies: Meta Platforms' January 2026 nuclear procurement included existing reactor capacity, fleet uprates across three plants and SMRs from two developers. Based on available data, it represents the largest multi-pathway U.S. nuclear capacity commitment by a single corporate buyer. NRC constraints may affect federal targets: More than 70% of reactor licensees plan to submit uprate applications. Regulatory resource limitations could delay approximately 1 GW to 2 GW of targeted capacity into the 2030s. Investment allocation will shift over time: Uprates and reactor restarts are projected to account for more than 75% of U.S. nuclear capacity additions through 2028. Their combined share could decline to approximately 50% by 2032 as initial SMR projects move toward commercial operation.
The report segments the nuclear expansion market by pathway, deployment timeline and buyer category, including regulated utilities, competitive generators, hyperscale technology companies and independent developers. It also provides a time-sequenced capital allocation framework for investors evaluating proven and emerging nuclear technologies.
Companies covered include Constellation Energy, Vistra Corp., Meta Platforms, Alva Energy, TerraPower, Oklo, NuScale Power, GE Vernova Hitachi Nuclear Energy, Westinghouse Electric, Holtec International, Tennessee Valley Authority and NextEra Energy. The research includes 10 charts and figures, eight data tables, 12 company profiles and a detailed methodology appendix that grades evidence from completed projects through unvalidated company claims.
Key Questions Addressed
- What is the total addressable U.S. nuclear capacity expansion investment through 2035? How does capital expenditure vary across fleet uprates, reactor restarts and SMR deployment? Which pathway delivers the greatest generating capacity per dollar invested? How could the NRC review pipeline affect the federal target of 5 GW in uprates by 2030? How are hyperscalers structuring nuclear power procurement across multiple technologies and timelines? How should investors allocate capital according to risk, evidence quality and deployment horizon?
Intended Audience
- Energy and utility equity research analysts Institutional investors and portfolio managers Private equity and infrastructure fund managers Corporate energy procurement executives Utility leadership and nuclear fleet strategy teams Nuclear technology developers and original equipment manufacturers Energy policy analysts and regulatory strategists Due diligence teams evaluating nuclear energy investments
By combining market sizing, cost benchmarking, regulatory analysis and company-level intelligence, the report provides a comprehensive framework for evaluating U.S. nuclear energy investment opportunities through 2035.
Key Topics Covered:
1. Executive Summary
1.1 Key Findings
1.2 Market Size and Scenario Summary
1.3 The Evidence Asymmetry: Why This Report Exists
2. The Comparative Framework: How to Read This Report
2.1 Market Definition and Scope
2.2 What's Included and Excluded
2.3 Evidence Grading Methodology
3. Market Thesis: The Undervalued Pathway
3.1 Core Thesis Statement
3.2 The Cost Data Asymmetry
3.3 Why the Narrative Favors SMRs Despite the Evidence
3.4 Implications for Capital Allocation
4. Pathway Analysis: Uprates
4.1 Technical Overview: MUR, Stretch, and Extended Power Uprates
4.2 Historical Track Record: 172 Approved Uprates, 8 GW Added
4.3 Cost Analysis Disaggregated
4.4 The Limerick Case: What $2.4B Actually Buys
4.5 The Alva Energy Model: Venture-Backed Uprating as a New Category
4.6 NRC Regulatory Pathway and Resource Constraints
4.7 Uprate Capacity Ceiling: Fleet Limitations
5. Pathway Analysis: Reactor Restarts
5.1 Technical and Regulatory Framework
5.2 Active Projects: Crane, Palisades, Duane Arnold
5.3 Cost Analysis
5.4 Restart Pipeline and Candidacy Assessment
6. Pathway Analysis: Small Modular Reactors
6.1 Technology Landscape: NuScale, TerraPower, Oklo, X-energy, BWRX-300
6.2 Cost Analysis: FOAK Reality vs. NOAK Projections
6.3 The NuScale CFPP Lesson: Only U.S. Datapoint
6.4 Vendor Pipeline and Deployment Timelines
6.5 When SMR Economics May Prove Out: The 2033+ Horizon
7. Pathway Analysis: New Large Reactors
7.1 Vogtle Lessons
7.2 VC Summer and AP1000 Reorder Prospects
7.3 Role in Long-Term Expansion (2035+)
8. Head-to-Head Comparison
8.1 Cost per Kilowatt: Demonstrated vs. Projected
8.2 Timeline to Operation: Months vs. Years vs. Decades
8.3 Regulatory Readiness: Amendments vs. New Licenses
8.4 Evidence Quality: Completed Projects vs. Engineering Models vs. Company Claims
8.5 Scalability: Bounded Fleet vs. Unlimited Greenfield
9. Market Sizing and Forecast
9.1 Methodology: Three-Method Triangulation
9.2 Base Case: 12 GW / $57B (2025-2035)
9.3 Scenario Analysis: Conservative, Base, Optimistic
9.4 Year-by-Year Projections by Pathway
9.5 Capital Expenditure Allocation by Pathway
10. Market Segmentation
10.1 By Pathway Type (with CapEx Allocation)
10.2 By Buyer Category (Hyperscalers, Utilities, Generators, Developers)
10.3 By Deployment Timeline (2025-2028, 2028-2032, 2032-2035)
11. Competitive Landscape
11.1 Market Structure: Utilities, OEMs, Developers, and New Entrants
11.2 Competitive Positioning Map
11.3 Recent Deals and Capital Commitments
11.4 Emerging Players and Disruptors
12. Company Profiles
12.1 Constellation Energy
12.2 Vistra Corp
12.3 GE Vernova Hitachi Nuclear Energy
12.4 Westinghouse Electric Company
12.5 Holtec International
12.6 NuScale Power
12.7 TerraPower
12.8 Oklo Inc.
12.9 Alva Energy
12.10 NextEra Energy
12.11 Tennessee Valley Authority
12.12 Meta Platforms
13. Growth Drivers and Headwinds
13.1 Growth Drivers
13.2 Headwinds
14. Policy and Regulatory Environment
14.1 Executive Orders 14299-14302: What They Do and Don't Guarantee
14.2 NRC Reform and Reorganization
14.3 DOE Loan Programs Office: Nuclear Prioritization
15. Methodology
15.1 Sizing Methodology: Three-Method Triangulation
15.2 Evidence Grading Framework
15.3 Data Sources and Quality Assessment
15.4 Assumptions Register
16. Data Tables and Source Index
A selection of companies mentioned in this report includes, but is not limited to:
- Constellation Energy Vistra Corp GE Vernova Hitachi Nuclear Energy Westinghouse Electric Company Holtec International NuScale Power TerraPower Oklo Inc. Alva Energy NextEra Energy Tennessee Valley Authority Meta Platforms
For more information about this report visit
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