Top 10 SMR Projects in Europe: Rolls-Royce, EDF, and Newcleo Lead the Way

The European Small Modular Reactor (SMR) market is decisively transitioning from design theory to tangible deployment, driven by urgent energy security and decarbonization goals. The central trend is the emergence of clear commercial pathways, with the United Kingdom’s substantial financial and political backing for Rolls-Royce SMR establishing it as the continent’s front-runner. This strategic government support, including over £2.5 billion in program funding and the designation of the 1, 440 MWe Wylfa site, has created a de-risked, bankable project that is spurring other nations to accelerate their own nuclear ambitions. The dominant theme for 2025 and beyond is this pivot to execution, marked by the establishment of the European SMR Industrial Alliance and a continental race to navigate complex regulatory approvals and secure the first wave of commercial reactor deployments by the early 2030 s.

1. Wylfa SMR Project

Developer: Rolls-Royce SMR
Capacity: 1, 440 MWe (Three 480 MWe reactors)
Technology: Pressurized Water Reactor (PWR)
Source: UK Gov’t Taps Rolls-Royce for Three SMRs at Wylfa | Neutron Bytes

2. Temelín SMR Project

Developer: Rolls-Royce SMR and ČEZ Group
Capacity: 470 MWe
Technology: Rolls-Royce SMR PWR
Source: And Now, SMR Intelligence Global – Robert Bryce | Substack

3. Dutch SMR Development

Developer: ULC-Energy, a consortium including Rolls-Royce SMR
Capacity: 470 MWe
Technology: Rolls-Royce SMR PWR
Source: The World Nuclear Industry Status Report 2024 (HTML)

4. Polish SMR Project

Developer: Orlen Synthos Green Energy (OSGE) and GE Hitachi
Capacity: 300 MWe per unit
Technology: GE Hitachi BWRX-300
Source: BWRX-300 Small Modular Reactor | GE Vernova Hitachi Nuclear

5. NUWARD SMR Project

Developer: EDF Group and partners
Capacity: 340 MWe per plant
Technology: NUWARD PWR
Source: DOE to Award $900 M to Build GEN III+ Small Nuclear Reactors

6. Newcleo Lead-Cooled Fast Reactor (LFR) Project

Developer: Newcleo
Capacity: 200 MWe (commercial scale)
Technology: Lead-Cooled Fast Reactor (LFR)
Source: Newcleo submits SMR design for UK assessment

7. Swedish SMR Initiative

Developer: Vattenfall
Capacity: Not specified
Technology: To be determined
Source: World Nuclear Outlook Report

8. Lithuanian SMR Feasibility Study

Developer: Newcleo and Ignalina Nuclear Power Plant (INPP)
Capacity: To be determined
Technology: Newcleo LFR
Source: Lithuania To Study Deployment Of Newcleo Small Modular Reactors

9. Last Energy Microreactor Project

Developer: Last Energy UK
Capacity: 80 MWe (Four 20 MWe units)
Technology: Pressurized Water Microreactor
Source: Last Energy Earns PDR Milestone at UK Office of Nuclear Regulation

10. Romanian SMR Project

Developer: Not specified
Capacity: Not specified
Technology: Not specified
Source: Europe’s Nuclear Renaissance – Bearing Point

Table: Top 10 European SMR Projects by Development Stage & Strategic Importance

SMR Applications, from Grid Power to Industrial Decarbonization

The diversity of SMR projects highlights a sophisticated market segmentation strategy, where different reactor technologies are being positioned to solve distinct energy challenges. At the high end, Rolls-Royce SMR’s 480 MWe PWR design is aimed squarely at providing grid-scale, baseload power, evidenced by its selection for the multi-reactor 1, 440 MWe Wylfa project. In contrast, GE Hitachi’s 300 MWe BWRX-300 in Poland is sized to replace retiring coal-fired power plants, offering a direct pathway to decarbonize existing energy infrastructure. At the smaller end, Last Energy’s 20 MWe microreactors in the UK target a different market entirely: providing dedicated, behind-the-meter power for industrial customers or data centers. This range of applications demonstrates that SMRs are not a one-size-fits-all solution but a versatile category of technologies poised for adoption across multiple sectors of the economy.

SMRs Poised to Boost Future Nuclear Capacity

This chart shows new SMRs will significantly contribute to future nuclear capacity. This visualizes the section’s point on SMRs being positioned to solve grid-scale power challenges.

(Source: Heinrich-Böll-Stiftung European Union)

UK Leads Europe’s SMR Deployment with Poland and Czech Republic Following

Geographically, the United Kingdom has established itself as the unambiguous leader in Europe’s SMR race. Its mature Generic Design Assessment (GDA) process, managed by the Office for Nuclear Regulation (ONR), provides a clear, structured, and globally respected pathway to licensing. The government’s decision to name Rolls-Royce SMR the preferred bidder for its national program and commit over £2.5 billion has created powerful commercial momentum. Following the UK’s lead, Central and Eastern European nations are moving aggressively to secure their energy future. The Czech Republic’s Early Works Agreement between ČEZ and Rolls-Royce SMR for the Temelín site and Poland’s progress on environmental permitting for the OSGE project are clear signals of a second wave of adoption. This regional clustering is driven by a shared goal to reduce reliance on volatile fossil fuel markets and build a secure, low-carbon energy base.

SMR Developers Compete for European Market Approval

The infographic maps the regulatory status of key SMR projects across Europe, reinforcing the section’s focus on the UK’s leadership role via its GDA process.

(Source: Heinrich-Böll-Stiftung European Union)

Rolls-Royce SMR’s £2.5 B Push Toward Commercialization by the 2030 s

The current SMR projects reveal a market advancing on two parallel tracks of technological maturity. The most advanced and commercially viable projects are based on proven Generation III+ reactor technology. Rolls-Royce SMR, EDF’s NUWARD, and GE Hitachi’s BWRX-300 are all variants of well-understood Pressurized Water Reactors (PWR) or Boiling Water Reactors (BWR). This reliance on established technology significantly de-risks the first wave of projects, making them more attractive to investors and regulators. In parallel, a second track of advanced Generation IV reactors is emerging. Newcleo’s Lead-Cooled Fast Reactor (LFR), which entered the UK GDA process in December 2024, represents this next frontier. While further from commercial deployment, these advanced designs promise benefits such as enhanced safety, reduced waste, and greater fuel efficiency, indicating a long-term innovation pipeline that will follow the initial commercial build-out.

SMR Market Projected for Rapid Growth

This chart’s forecast for accelerating market growth into the 2030s directly visualizes the push toward commercialization that is the central theme of this section.

(Source: Precedence Research)

£599 Million Loan for Rolls-Royce SMR Signals Regulatory Confidence

The single most critical action for the SMR industry in the coming year is converting regulatory progress into final investment decisions (FIDs). The primary signal to monitor is the flow of private capital and state-backed financing that follows key licensing milestones, as this will validate the commercial bankability of the leading designs.

• If Rolls-Royce SMR successfully completes the UK’s GDA process, expect an immediate acceleration of commercial agreements in the Netherlands and the Czech Republic, as these countries can leverage the ONR’s rigorous assessment to de-risk their own regulatory approvals.
• The £599 million loan facility committed to Rolls-Royce SMR in April 2026 exemplifies this dynamic, where government financial instruments are unlocked by demonstrated progress.
• Watch for the European SMR Industrial Alliance to move from endorsing projects to facilitating a pan-European supply chain. The acceptance of Newcleo’s LFR design into the GDA process in June 2025 is a critical signal that regulators are building capacity to assess not just Gen III+ designs but advanced Gen IV reactors as well.
• The success or failure of Poland’s environmental permitting for the BWRX-300 will be a key indicator of the viability of SMR deployment in Central and Eastern Europe and will heavily influence regional investment decisions.

SMR Market Forecast to Reach $7.8B

The chart’s market value projection quantifies the commercial bankability of SMRs. This supports the section’s argument that capital flow is the key signal of industry progress.

(Source: maximize market research)

The questions your competitors are already asking

This report covers one angle of the European SMR commercialization race. The questions that matter most depend on your work.

• Which companies are gaining or losing ground in the European SMR market?
• What is the outlook for SMR deployment in Europe by the early 2030s?
• How does Rolls-Royce SMR’s PWR technology compare to EDF’s NUWARD and Newcleo’s LFR for European grid deployment?
• What is the status of SMR licensing pathways in key markets like the UK, France, and Czechia?

This report does not answer these. Enki Brief Pro does.

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