The energy supply landscape for hyperscale data centers is undergoing a fundamental paradigm shift. While wind and solar energy were long considered the only viable options for sustainable Power Purchase Agreements (PPAs), nuclear power has experienced a remarkable renaissance in Europe — fundamentally transforming the energy strategy of the entire industry.
The Turning Point: Google and Fortum Set the Standard
In September 2026, Google signed a 20-year PPA with Finnish utility Fortum Oyj — the first nuclear PPA of its kind in Europe. The agreement secures up to 50 percent of the capacity from the Loviisa nuclear power plant for Google, enabling the operator to run the facility through 2050. The investment volume: approximately one billion euros, embedded within Google's €13 billion AI infrastructure initiative in Finland.
This deal is not an isolated event. It marks the beginning of a structural shift in the European PPA market for data centers. According to Aegir Insights, contracted capacity for European data centers has nearly tripled since 2022 to over 4,300 MW — and the technology mix has expanded from three to eight energy sources, including nuclear power, geothermal, and hybrid solutions for the first time.
Why Nuclear Power Becomes Strategically Indispensable for Hyperscalers
The Baseload Problem of AI Infrastructure
AI workloads are not intermittent loads. GPU clusters for large language models and inference infrastructure run around the clock at consistently high power density — rack power levels of 100 kW and above are today's standard. This characteristic makes baseload energy a strategic necessity.
Wind and solar energy deliver volatile generation profiles. For a 500 MW hyperscale campus, this means: either massive battery storage (with corresponding costs and space requirements), expensive backup capacities, or — and this is the critical point — a baseload source that reliably delivers 24/7.
Nuclear power plants fulfill exactly this requirement. With availability factors of 90 to 95 percent and predictable maintenance cycles, they provide the supply security that AI infrastructure demands.
Decarbonization Without Compromising Supply Security
The EU taxonomy has classified nuclear power as a sustainable energy source — a regulatory milestone that opens nuclear PPAs to ESG-compliant investors and operators. For hyperscale data centers pursuing ambitious decarbonization targets, nuclear power offers a unique combination: near-zero CO₂ generation with simultaneously high supply security.
The Scope 2 emission factor for nuclear power is 12 g CO₂ equivalent per kWh — comparable to offshore wind and significantly below gas (490 g/kWh) or coal (820 g/kWh). For a 500 MW campus with annual consumption of approximately 4.4 TWh, a nuclear PPA means avoiding over 2 million tonnes of CO₂ equivalent compared to a gas-powered scenario.
The European Nuclear PPA Market: Geography and Potential
Finland as Pioneer
Finland has established itself as the leading market for nuclear PPAs in Europe. With the Olkiluoto 3 nuclear power plant — Europe's most powerful reactor at 1,600 MW — and the Loviisa complex, the country has substantial baseload capacity. Political stability, low electricity prices, and proximity to Scandinavian data center hubs make Finland the preferred location for energy-intensive AI infrastructure.
France: Europe's Nuclear Heavyweight
France covers approximately 70 percent of its electricity demand from nuclear power and plans to build six new EPR2 reactors by 2035. For hyperscale data centers, France therefore offers the greatest potential for long-term nuclear PPAs in Europe. Proximity to the FLAP-D markets (Frankfurt, London, Amsterdam, Paris, Dublin) and existing high-voltage infrastructure are additional location advantages.
Poland and the Czech Republic: Emerging Markets
Poland is planning the construction of its first nuclear power plant (6 GW by 2040) and is positioning itself as a future nuclear PPA market for data centers in Central Europe. The Czech Republic is expanding the Dukovany nuclear power plant with four new units — a project that opens long-term PPA opportunities for the growing data center industry in the region.
Structural Requirements for Nuclear PPAs
Contract Terms and Pricing
Nuclear PPAs differ structurally from renewable PPAs. Typical contract terms range from 15 to 25 years — significantly longer than the 10 to 15 years common for wind or solar PPAs. These long terms reflect the capital intensity of nuclear power plants and require data center owners to have corresponding long-term planning certainty.
Pricing is typically structured as a fixed or indexed baseload price, eliminating spot market volatility. For hyperscale data centers where energy costs represent 40 to 60 percent of total operating costs, this price certainty is a significant strategic advantage.
Regulatory Complexity
Nuclear PPAs require careful regulatory analysis. In some EU member states, restrictions exist on direct power supply contracts with nuclear power plants. The involvement of an experienced energy partner — one who understands both the regulatory requirements and the technical specifications — is essential for data center owners.
ArcTeron as Energy Partner: Integrated Energy Strategy for Hyperscalers
As a European hyperscale data center owner and energy partner, ArcTeron pursues an integrated approach to energy supply. The goal: 5 GW of proprietary data center capacity in Europe, secured by a diversified energy strategy encompassing grid connection, renewable energies, gas/LNG as a bridge technology, and — where regulatorily feasible — nuclear PPAs.
The Own-and-Hold Model as Foundation
ArcTeron's proprietary asset strategy creates the prerequisite for long-term energy contracts. Only those who hold data centers permanently in their own portfolio can economically justify 20-year PPAs. Short-term developer exit strategies and long-term nuclear PPAs are structurally incompatible.
Energy Portfolio Diversification
The optimal energy strategy for a hyperscale campus combines multiple sources:
- Baseload (40–60%): Nuclear PPA or long-term grid contract with baseload guarantee
- Renewable energy (30–50%): Wind and solar PPAs for carbon neutrality
- Flexibility (10–20%): Demand response, battery storage, gas backup for peak loads
This diversification minimizes both supply risks and price volatility — while simultaneously enabling the fulfillment of ambitious ESG targets.
Market Outlook: Nuclear PPAs as the Standard of the Next Decade
Demand for baseload energy for AI infrastructure will grow exponentially in the coming years. In Germany alone, the AI share of data center capacity will rise from 20 percent (2026) to 55 percent by 2035 — with simultaneously growing total capacities from the current 2,980 MW.
Nuclear PPAs will in this context evolve from a niche solution to a strategic standard. Hyperscale data center owners who today set the course for long-term nuclear PPAs secure a decisive competitive advantage: stable energy costs, high supply security, and ESG compliance — the three central requirements of the next decade.
For ArcTeron as a European infrastructure owner and energy partner, the integration of nuclear PPAs into the energy strategy is not a future scenario but a concrete component of portfolio planning. The question is not whether, but when and to what extent nuclear power will co-shape the energy base of European hyperscale data centers.
ArcTeron is a European owner and financier of hyperscale data centers with a target of 5 GW of proprietary capacity. As an integrated energy partner, ArcTeron covers the entire energy supply chain — from grid connection through renewable energies to gas/LNG and hydrogen. Further information: arcteron.ai