Rolls-Royce SMR Brand Guidelines: Derby’s Small Modular Reactor & the Wylfa Choice

The engineering group, not the car maker.

Rolls-Royce SMR is the small-modular-reactor company of Rolls-Royce, the British engineering group. English Wikipedia describes its parent, Rolls-Royce Holdings plc, as an aerospace and defence company whose business, established in 1904, designs and makes power systems for aviation and other industries. It is a separate business from Rolls-Royce Motor Cars, the car maker at Goodwood in West Sussex, which English Wikipedia says has been a wholly owned subsidiary of BMW since 2003.

Rolls-Royce SMR Limited was incorporated on 24 November 2020 and is registered in Derby, care of Rolls-Royce plc, Companies House records show. The design work behind it is older: English Wikipedia says Rolls-Royce began designing the reactor around 2015 with a team of about 150 people, deciding early to use light water as both coolant and moderator.

The company’s first large funding round came on 9 November 2021, when the UK government announced new grant funding for Rolls-Royce SMR, matched by private investment, to take forward the second phase of what it called the Low-Cost Nuclear project — developing the design further and taking it through regulatory assessment. English Wikipedia names the private investors in that round as the Rolls-Royce group, BNF Resources UK and Exelon Generation.

Ownership has since widened. In November 2023, according to English Wikipedia, Rolls-Royce owned 76 percent of the company, with minority stakes held by the Perrodo family, Qatar and Constellation Energy. On 29 October 2024 World Nuclear News reported that the Czech utility ČEZ Group had taken a 20 percent stake and planned to work with Rolls-Royce SMR on small modular reactors providing up to 3 gigawatts of capacity in the Czech Republic.

Three loops and a regulator’s steps.

The reactor is a pressurised water reactor in a close-coupled three-loop arrangement, English Wikipedia says. UK regulators’ 2024 reports describe it as the Rolls-Royce 470 MWe small modular reactor design; English Wikipedia notes that it was first planned at 440 megawatts electric and that 470 is above the usual range considered small for such reactors. Its components, according to the same article, were sized to the largest that can travel by road, the plant is meant to be assembled on site under a weatherproof canopy, and its fuel assembly is a shortened version of an existing Westinghouse 17×17 design.

The design is going through the UK’s Generic Design Assessment, the process in which the Office for Nuclear Regulation, the Environment Agency and Natural Resources Wales scrutinise new nuclear power station designs before any are built. Step 1 of the Rolls-Royce SMR assessment formally began on 3 April 2022 and Step 2 on 3 April 2023; the regulators completed Step 2 and published their statements and reports in July 2024, according to the government’s publication page.

Manufacturing is central to how the company presents itself. Its chief executive, Chris Cholerton, spoke in October 2026 of a “repeatable, factory-built approach” that he said would bring greater certainty to delivery; that is the company’s own claim. English Wikipedia records that in April 2024 Rolls-Royce dropped plans to build its own pressure-vessel factory in favour of buying from outside suppliers, and that in May 2026 Rolls-Royce SMR chose Škoda JS and Doosan Enerbility for pre-production work on reactor pressure vessels and related parts, a decision some UK politicians and industry figures criticised in light of the target for British content. The same article says that in September 2026 Škoda JS was chosen as sole supplier of the control rod drive mechanisms.

Design and documentation.

Nuclear companies sell to a small number of buyers — utilities, governments and regulators — over very long timescales, and their imagery tends to reflect that. Corporate pages and reports often return to the same few scenes: cooling towers and reactor domes photographed under clear skies, turbine halls in clean, even light, and wide views of plants set against water or open country.

Newer reactor designers, many of which have not yet built a commercial plant, lean on renders instead. Small modular plants appear as low, compact buildings in green landscapes, sometimes beside a town or a data centre, with no smoke and few people. Large-reactor vendors show construction sites, cranes and heavy components such as reactor vessels and steam generators on the move, a way of picturing scale and progress at once.

People appear mostly as engineers in hard hats and overalls, inspecting a weld, reading a control-room screen or handling fuel. Two images recur across the trade: the blue Cherenkov glow of a spent-fuel or research-reactor pool, caused by charged particles travelling through water faster than light does in it, and ceramic fuel pellets held in a gloved hand. Both are used to make an invisible process visible.

The industry also presents itself in person, at trade gatherings such as the World Nuclear Exhibition and the meetings of the American Nuclear Society, where stands, renders and scale models carry much of the message. The companies in this guide range from Framatome, founded in 1958, and Urenco, set up by treaty in the early 1970s, to much younger reactor designers, and their visual languages vary just as widely.

Preferred bidder, then Wylfa.

The decisive step came through the UK’s state-run competition. On 10 June 2025 the government announced that Rolls-Royce SMR had been selected as preferred bidder to partner with Great British Energy – Nuclear, the publicly owned body that took that name from Great British Nuclear the same day, after a two-year competition; the selection was subject to final government approvals and contract signature. On 13 November 2025 the government named Wylfa, on Anglesey in North Wales, a site with nuclear history going back to the 1960s, as the location of the country’s first small modular reactor power station.

The contract followed on 13 April 2026, when Great British Energy – Nuclear and Rolls-Royce SMR signed an agreement that began site-specific design, regulatory engagement and planning work ahead of a future final investment decision; Cholerton said it covered the first three units. English Wikipedia says that decision is expected in 2029. The Wylfa project has since been named Gwyndod, and in October 2026 more than 400 suppliers attended a two-day conference on Anglesey, the government said, with a stated ambition for 70 percent of the project’s content to come from UK-based companies.

Abroad, English Wikipedia records an April 2026 early works contract with ČEZ at the Temelín plant in the Czech Republic and a June 2026 choice of three units by Videberg Kraft for a planned project near Ringhals in Sweden; both are at a preparatory or planning stage rather than approved construction.

For a design guide, Rolls-Royce SMR shows how an engineering group’s long-established name can be carried onto a new, state-backed product line with its own milestones. Compare Westinghouse, whose 17×17 fuel assembly the design adapts, and Doosan, whose Doosan Enerbility was chosen for pre-production work on its pressure vessels. For this guide we use a deep navy, a mist and a steel blue with a sans, an unofficial interpretation; no product or logo is reproduced.

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