Key Takeaways:
Small modular reactors are transitioning from concept to commercial reality as developers file multibillion-dollar deployment plans across Europe and North America.
The global race to deploy small modular reactors is accelerating, with Polish developer SGE submitting plans for a 4.2 GW fleet in the UK — equivalent to 11 percent of current British power demand — as countries seek carbon-free baseload power to replace retiring nuclear capacity and meet net-zero targets.
"Standardisation, repetition, modularisation, and a fleet deployment strategy are the most effective ways to deliver new nuclear projects successfully, reducing costs, construction risk, and delivery times," Rafał Kasprów, CEO of SGE, said in a statement announcing the application.
SGE's plan calls for six BWRX-300 reactors at an initial UK site, with four each at two subsequent locations, targeting first commercial operation by 2034. Each 300 MW unit is expected to cost about GBP2.2 billion to GBP2.5 billion once the fleet approach is established, according to the company. The application, exceeding 1,500 pages, follows SGE's GBP50 million investment in UK project development and includes partners Laing O'Rourke and Aecon Group, the latter drawing on experience from the Darlington New Nuclear Project in Ontario — the first commercial-scale SMR under construction in the Western world.
The UK currently generates about 15 percent of its electricity from 5.9 GW of nuclear capacity, most of which is set to retire by the end of the decade. Government plans call for up to 24 GW of new nuclear by 2050, creating a potential market for SMR developers including GE Vernova Hitachi, which designed the BWRX-300, and Rolls-Royce SMR, which was selected last year for at least three 470 MW units at the Gwyndod site in North Wales.
The Fleet Economics Argument
SGE's approach relies on a fleet deployment model — building multiple identical reactors across standardized sites — to drive down per-unit costs. The company has screened more than 100 potential locations through its partner Fermi Development, with about 40 sites identified as potentially developable. This contrasts with the traditional bespoke construction model that has plagued large-scale nuclear projects like Hinkley Point C, where costs have ballooned to an estimated GBP46 billion.
The company is proposing a Contract for Difference financing scheme, similar to the model used for Hinkley Point C, with modifications to better enable private finance. Under this structure, developers finance construction and only begin receiving revenue when the plant starts generating electricity, with the government providing revenue support and risk sharing. SGE founder Michał Sołowow stressed the project is commercially driven: "We are not asking for money from the UK government, we are asking for the opportunity. It is our risk, if we don't deliver."
Global SMR Momentum Builds
The UK application is part of a broader wave of SMR activity. In Poland, Orlen Synthos Green Energy — SGE's parent — applied last month for a Contract for Difference to build 14 BWRX-300 units at three locations, targeting first operation in 2032. The company ultimately plans 26 units across Poland.
In the US, advanced nuclear development is accelerating under federal initiatives. President Trump's executive orders set a target of three advanced reactors achieving criticality by July 2026, with Antares Nuclear's Mark-0 microreactor reaching that milestone on June 4 at Idaho National Laboratory, followed by Valar Atomics' Ward 250. The Idaho lab, which has not seen a new reactor achieve criticality in more than 50 years, is now hosting multiple test facilities including Radiant Nuclear's Kaleidos microreactor, a 1 MW design transportable in shipping containers.
Oklo is building its 75 MW Aurora reactor at INL, pursuing a model where the developer retains ownership and sells power under long-term contracts rather than selling reactors. The company was also selected by the US Air Force to supply a 5 MW microreactor for Eielson Air Force Base in Alaska, where utilities are exploring nuclear as an alternative to diesel generation for remote power needs.
Investment Implications
For investors, the SMR buildout represents a structural shift in nuclear energy economics. The BWRX-300's projected cost of GBP2.2 billion to GBP2.5 billion per unit in fleet mode compares favorably with large-scale reactors, which can exceed GBP20 billion per GW. GE Vernova Hitachi's design passed Step 2 of the UK's Generic Design Assessment in December, with regulators finding "no fundamental safety, security, safeguards or environmental protection shortfalls."
Nano Nuclear, as an emerging developer in the SMR space, stands to benefit from the growing policy momentum and private-sector interest. The company operates in a market where governments across Europe and North America are creating regulatory pathways and financing frameworks specifically designed to accelerate SMR deployment. The UK's Advanced Nuclear Framework, the US Inflation Reduction Act's nuclear production tax credits, and Poland's Contract for Difference mechanism all provide revenue visibility that enables project financing.
The key risk remains execution: no BWRX-300 has yet reached commercial operation, and the Darlington project in Canada — the furthest along in the Western world — is still under construction. SGE's 2034 target for first UK power gives the industry roughly eight years to prove the technology at commercial scale. If successful, the fleet model could unlock a market worth tens of billions of dollars across Europe alone.
This article is for informational purposes only and does not constitute investment advice.
