The Data Center Power Crisis and the Nuclear Solution
The AI revolution has created an unprecedented demand for reliable, high-density power. A single NVIDIA GB200 NVL72 rack draws 120 kW, and the next-generation NVL144 systems will push past 200 kW per rack. Hyperscale campuses are now requesting 500 MW to 2 GW of power capacity -- more than many small cities consume. Utility grids in key markets including Northern Virginia, Dublin, Singapore, and parts of the Middle East are struggling to deliver new interconnection capacity within acceptable timelines. Wait times for grid connections exceeding 100 MW now stretch to 5 to 8 years in some regions.
Small modular reactors (SMRs) offer a path through this bottleneck. These factory-built nuclear reactors produce 50 to 300 MW per module, deliver power with a capacity factor above 90 percent (compared to 25 to 35 percent for solar and wind), generate zero carbon emissions during operation, and can be sited directly adjacent to data center campuses. In 2025 and 2026, Amazon, Google, Microsoft, and Oracle all announced nuclear power procurement strategies specifically targeting data center loads, signaling that nuclear is transitioning from theoretical option to commercial priority.
What Is a Small Modular Reactor?
An SMR is a nuclear fission reactor that generates up to 300 MW of electrical power from a compact, factory-manufactured unit. Unlike conventional gigawatt-scale reactors that require decades of on-site construction, SMRs are designed to be assembled in factories, shipped by truck or rail, and installed at prepared sites in a fraction of the time. The "modular" designation reflects both the manufacturing approach and the deployment strategy: operators can install a single module to serve a 100 MW data center, then add modules incrementally as the campus grows.
Key characteristics that differentiate SMRs from traditional nuclear plants:
- Passive safety systems -- SMRs use physical phenomena (gravity, natural convection, negative temperature coefficients) rather than active mechanical systems to maintain safe conditions. Most designs can achieve safe shutdown without operator intervention or external power for 72 hours or indefinitely.
- Below-grade installation -- many SMR designs are partially or fully buried, providing inherent physical protection and reducing the visual and security footprint of the installation.
- Reduced emergency planning zones -- the NRC has approved site-boundary-only emergency planning for certain SMR designs, eliminating the 10-mile evacuation zone required for conventional plants and making co-location with data centers feasible.
- Factory manufacturing -- reactor vessels, steam generators, and containment structures are built in controlled factory environments with aerospace-grade quality assurance, then transported to the site for final assembly.
Leading SMR Designs for Data Center Applications
Several reactor designs are in advanced stages of development or regulatory approval, each with characteristics that align with different data center deployment scenarios.
| Reactor / Vendor | Type | Output (MWe) | Coolant | Regulatory Status | First Commercial Unit |
|---|---|---|---|---|---|
| NuScale VOYGR | Light water PWR | 77 per module (up to 924 MW / 12 modules) | Water | NRC design certified (2023) | 2030 (projected) |
| GE-Hitachi BWRX-300 | Boiling water | 300 | Water | NRC review in progress; Canadian pre-licensing complete | 2029 (Ontario) |
| Kairos Power Hermes | Fluoride salt-cooled | 35 (demo) / 140 (commercial) | Molten fluoride salt (FLiBe) | NRC construction permit granted (2023) | 2027 (demo), 2030+ (commercial) |
| TerraPower Natrium | Sodium-cooled fast reactor | 345 (with thermal storage) | Liquid sodium | NRC pre-application review | 2030 (Wyoming demo) |
| X-energy Xe-100 | High-temperature gas | 80 per module (up to 320 MW / 4-pack) | Helium | NRC review in progress | 2029 (Dow Chemical site) |
Water-Cooled SMRs: Proven Technology at Smaller Scale
NuScale and GE-Hitachi use light-water reactor technology, the same fundamental approach that has powered commercial nuclear plants worldwide for 60 years. The engineering maturity of water-cooled designs translates to lower regulatory risk and faster licensing timelines. NuScale's VOYGR is the only SMR design with a completed NRC design certification, making it the nearest-term option for US deployments. For data center operators seeking the lowest-risk nuclear pathway, water-cooled SMRs offer the most predictable licensing and construction schedules.
Advanced Coolant Designs: Higher Efficiency and Thermal Integration
Molten salt, liquid sodium, and helium-cooled designs operate at higher temperatures (550 to 850 degrees C) than water-cooled reactors (300 degrees C), enabling higher thermal efficiency and valuable process heat applications. TerraPower's Natrium includes an integrated molten salt thermal energy storage system that can ramp electrical output from 100 MW to 345 MW within minutes, providing load-following capability that matches the dynamic power demands of large AI training clusters. For energy infrastructure operators like Rax, advanced coolant designs offer additional revenue streams through process heat sales, waste heat recovery, and hydrogen co-production.
Why Hyperscale Operators Are Choosing Nuclear
The convergence of four factors is driving hyperscale data center operators toward nuclear power.
1. Grid Capacity Constraints
Securing 200+ MW of new grid interconnection in Northern Virginia (the world's largest data center market) now requires utility-funded transmission upgrades with lead times of 5 to 8 years. In emerging markets across the MENA region, grid infrastructure may not exist at the required scale. Behind-the-meter nuclear generation bypasses grid queues entirely, allowing operators to build data center capacity on their own timeline.
2. Carbon-Free Commitments
Amazon, Google, and Microsoft have all committed to 24/7 carbon-free energy by 2030. Solar and wind are intermittent -- they deliver electricity only when the sun shines or wind blows. Nuclear operates at 90+ percent capacity factor regardless of weather or time of day, providing the firm, carbon-free baseload that renewable energy alone cannot deliver. Pairing nuclear with renewable energy certificates achieves true 24/7 clean energy matching rather than annual averaging.
3. Price Stability
Uranium fuel costs represent only 10 to 15 percent of nuclear generation costs, compared to 60 to 80 percent for natural gas plants. This means nuclear electricity prices are largely immune to fossil fuel price volatility. A data center operator signing a 20-year nuclear power purchase agreement gains exceptional energy cost predictability -- a critical advantage for facilities with 20 to 30 year useful lives and customers demanding long-term pricing commitments.
4. Power Density
A single 300 MW SMR module occupies approximately 15 acres of land including security perimeter, compared to 3,000+ acres for an equivalent solar installation or 30,000+ acres for wind. For data center operators acquiring campus sites in land-constrained markets, the power density of nuclear is unmatched by any other generation technology. This compactness is especially relevant in the UAE and other Gulf states where available land near fiber interconnection points and population centers is at a premium.
Licensing and Regulatory Pathway
Nuclear licensing represents the most significant timeline risk for data center operators pursuing SMR deployments. Understanding the regulatory framework is essential for realistic project planning.
US Nuclear Regulatory Commission (NRC)
The NRC licensing process for SMRs follows two parallel tracks:
- Design certification -- the reactor vendor submits a design certification application (DCA) that undergoes safety review, independent of any specific deployment site. Once certified, the design can be referenced by any project nationwide. NuScale completed this process in 2023; others are in various stages of review.
- Combined license (COL) -- the site-specific operator applies for a combined construction and operating license referencing the certified design. This site-specific review evaluates geology, seismology, hydrology, emergency planning, and environmental impact. The NRC targets 24 to 36 months for COL review on certified designs.
For data center operators, the practical implication is that projects using NRC-certified designs (currently only NuScale) face shorter regulatory timelines than those using designs still under review. However, the NRC is actively working to streamline review processes under the Nuclear Energy Innovation and Modernization Act (NEIMA), which mandates risk-informed, technology-inclusive licensing frameworks for advanced reactor designs.
International Regulatory Frameworks
Countries including Canada (CNSC), the UK (ONR), and the UAE (FANR) are developing SMR-specific licensing frameworks. The UAE's Federal Authority for Nuclear Regulation has regulatory experience from the Barakah nuclear power plant (four APR-1400 units, 5.6 GW total) and is positioned to evaluate SMR applications leveraging that institutional knowledge. For operators planning UAE data center deployments, the combination of FANR regulatory maturity and the national energy diversification mandate under UAE Energy Strategy 2050 creates a favorable environment for nuclear-powered data center co-location.
Economics: SMR Cost Analysis for Data Center Operators
| Cost Component | SMR (First-of-a-Kind) | SMR (Nth-of-a-Kind) | Grid + Diesel Backup |
|---|---|---|---|
| Capital cost ($/kW installed) | $6,000 to $10,000 | $3,000 to $5,000 | $200 to $500 (grid connection + gensets) |
| LCOE ($/MWh) | $60 to $90 | $40 to $65 | $70 to $120 (varies by market) |
| Fuel cost ($/MWh) | $6 to $9 | $6 to $9 | $40 to $80 (natural gas / diesel) |
| Capacity factor | 90%+ | 93%+ | Varies (grid: 99.9%; diesel: 0.1% standby) |
| Carbon cost exposure | $0 | $0 | $15 to $100/tonne (rising) |
| Facility lifespan | 40 to 60 years | 40 to 60 years | Data center: 20 to 30 years |
| Grid independence | Full (behind-the-meter) | Full | Dependent on utility |
The capital intensity of first-of-a-kind SMR deployments is significant, but the economics improve substantially at scale. A data center operator deploying multiple SMR modules across a fleet of campuses can negotiate volume discounts on factory-built reactors, amortize licensing costs across deployments, and leverage operating experience to reduce construction timelines. The 40 to 60 year reactor lifespan also means a single SMR installation can serve multiple generations of data center hardware refresh cycles, providing power infrastructure that outlasts the IT equipment it serves.
Co-Location Strategies: Siting SMRs at Data Center Campuses
The most compelling deployment model for data center operators is co-locating an SMR directly at or adjacent to the data center campus. This eliminates transmission losses (typically 5 to 8 percent for grid-delivered power), avoids transmission and distribution charges, and provides complete energy independence.
Behind-the-Meter Configuration
The SMR connects directly to the data center's medium-voltage distribution system, bypassing the utility grid entirely. The reactor operates as a dedicated power plant for the data center, with UPS systems and battery storage providing ride-through during reactor maintenance outages. This configuration maximizes cost savings and provides the highest level of energy security, but requires the data center operator to hold or partner with an entity that holds a nuclear operating license.
Adjacent Utility Model
A nuclear utility or independent power producer builds and operates the SMR on adjacent land and sells power to the data center under a long-term PPA. The data center operator avoids nuclear licensing complexity while securing dedicated, carbon-free baseload power. This model mirrors how Amazon structured its agreement with Talen Energy at the Susquehanna nuclear plant and how Google approached its partnership with Kairos Power.
Campus Power Hub
Multiple data center tenants share an SMR-powered campus, with the reactor operator selling power to colocation providers, hyperscalers, and enterprise tenants under individual power purchase agreements. This model distributes capital risk across multiple anchor tenants and mirrors the multi-tenant structure of existing colocation data centers, extending it to include the power source itself.
Integrating SMR Power with Data Center Infrastructure
Nuclear SMRs produce steady baseload power, but data center loads are not perfectly constant. AI training workloads can spike GPU cluster power consumption by 20 to 40 percent during peak computation phases. Effective integration requires pairing the SMR with complementary systems.
- Battery energy storage -- lithium-ion or flow batteries absorb load transients and provide millisecond-response power conditioning that nuclear reactors cannot match. A 10 to 20 MWh battery system per 100 MW of SMR capacity provides sufficient buffering for typical data center load profiles.
- Thermal energy storage -- TerraPower's Natrium design integrates molten salt thermal storage that can boost electrical output from 100 MW to 345 MW for up to 5.5 hours, providing built-in peak-shaving capability without batteries.
- Hydrogen production -- excess nuclear electricity during low-load periods can power electrolyzers to produce green hydrogen for on-site fuel cell backup or sale, creating additional revenue and energy storage.
- District cooling -- reactor waste heat can drive absorption cooling systems that supplement or replace electrically-driven chillers for the data center's cooling plant, improving overall energy utilization and reducing PUE.
Timeline Considerations for Data Center Operators
Operators evaluating nuclear power should align their planning horizons with realistic SMR deployment timelines.
- 2026 to 2027: Sign letters of intent or preliminary agreements with SMR vendors. Begin site characterization studies. Engage with NRC or relevant national regulator on pre-application discussions.
- 2027 to 2029: Submit combined license applications (for US) or equivalent national permits. Begin site preparation and civil works. Place orders for factory-built reactor modules.
- 2029 to 2032: First commercial SMR units come online at demonstration sites (Ontario BWRX-300, Wyoming Natrium, Tennessee Hermes). Data center operators with early agreements begin receiving nuclear power.
- 2032 and beyond: Factory production ramps. Nth-of-a-kind economics kick in. Nuclear-powered data center campuses become commercially routine.
For operators who cannot wait for SMR deployment, PPAs with existing nuclear plants provide an immediate path to carbon-free baseload power. Amazon's 960 MW agreement with Talen Energy and Microsoft's Three Mile Island restart agreement demonstrate that existing nuclear capacity can serve data center loads today, while SMR deployments represent the next decade's buildout.
Risks and Challenges
Nuclear power for data centers is not without significant challenges that operators must evaluate honestly.
- Regulatory uncertainty -- while the NRC and international regulators are streamlining SMR licensing, the process remains complex, expensive, and subject to delays. Budget $50 to $100 million and 3 to 5 years for licensing activities.
- Capital intensity -- first-of-a-kind SMR installations carry substantial upfront costs that require patient capital with 15 to 20 year return horizons. This favors hyperscale operators and infrastructure funds over smaller colocation providers.
- Public perception -- nuclear energy remains controversial in some communities. Data center operators should engage early with local stakeholders, leveraging SMR passive safety features and reduced emergency planning zones to address concerns.
- Waste management -- spent nuclear fuel requires long-term storage and eventual disposal. While SMRs produce significantly less waste than conventional reactors per MWh, the waste management question remains a political and logistical factor.
- Construction delays -- the nuclear industry has a history of cost overruns on large projects. Factory manufacturing of SMR modules is designed to mitigate this risk, but the approach is largely unproven at commercial scale.
The Rax Perspective: Nuclear-Ready Energy Infrastructure
Rax Energy is monitoring SMR developments closely as part of its long-term power strategy for UAE data center operations. The UAE's operational experience with the 5.6 GW Barakah nuclear plant, combined with FANR's regulatory maturity and the national Energy Strategy 2050 mandate for clean energy diversification, positions the Emirates as a potential early market for SMR-powered data center campuses. For current deployments, Rax leverages the UAE's competitive power pricing and clean energy mix while building toward a future where nuclear, solar, hydrogen, and grid power operate as an integrated energy portfolio serving AI and mining workloads at scale.
Planning for the future of data center power? Contact Rax Data & Energy to discuss power procurement strategies, co-location opportunities, and energy infrastructure planning for high-density AI and mining deployments in the UAE.
Frequently Asked Questions
How much power does a small modular reactor produce?
Individual SMR modules generate between 50 MW and 300 MW of electrical output. NuScale's VOYGR produces 77 MW per module (up to 924 MW with 12 modules), while GE-Hitachi's BWRX-300 produces 300 MW per unit. Multiple modules can be deployed incrementally to match growing data center capacity.
What is the levelized cost of electricity from a nuclear SMR?
Current estimates place SMR LCOE at $60 to $90 per MWh for first-of-a-kind units, declining to $40 to $65 per MWh at production scale. Over a 40 to 60 year lifespan, SMRs offer highly predictable energy costs since uranium fuel accounts for only 10 to 15 percent of total generation cost.
How long does it take to license and build a nuclear SMR?
The total timeline ranges from 7 to 12 years currently, including 3 to 5 years for design certification (if not already certified), 2 to 3 years for site-specific licensing, and 2 to 4 years for construction. As regulatory frameworks mature and factory production scales, timelines are projected to compress to 5 to 7 years by the early 2030s.
Are there safety concerns with placing nuclear reactors near data centers?
SMR designs incorporate passive safety systems requiring no operator intervention or external power. The small core size means significantly lower radioactive inventory compared to conventional reactors. The NRC-mandated emergency planning zone for SMRs can be as small as the site boundary itself, making data center co-location feasible from both regulatory and public safety perspectives.