Rolls‑Royce laid out a defence-focused case for its Advanced Modular Reactor at UDT in London. The firm argued the design could offer persistent power, resilience and export revenue. Its pitch blends military utility with wider commercial ambitions.
Defence capability at the fore
At the Undersea Defence Technology exhibition, Mark Cheeseman, Programme Executive on Rolls‑Royce’s AMR team, framed the reactor as more than an energy project; he called it a tool for resilience. He told the UK Defence Journal the reactor is intended to give military units a continuous, power‑dense source that can run for years without refuelling. "The resilience that this kind of product would offer… being able to fuel for between five and seven years… is very attractive," Cheeseman said.
The military values predictable on-site power when local grids fail or don't exist; commanders rely on steady supplies to keep equipment and sensors running. Cheeseman highlighted mobility: the design is being developed so units can be trucked to remote sites, and multiple units can be joined to scale output.
The design uses coated particle fuel, which Rolls‑Royce argues allows passive safety characteristics — "you could walk away from this reactor, and everything will be fine… it will safely come to its own controlled stop," Cheeseman added. That, he said, reduces the need for the extensive redundant systems associated with large reactors and opens up more siting options closer to population and industrial centres.
Continuous, compact power can keep forward bases, ports and remote logistics hubs running without fuel convoys, easing logistics for deployed forces. And it matters for procurement planners trying to weigh up cost, risk and deployability.
Commercial and export ambitions
Thing is, Rolls‑Royce didn’t pitch the AMR solely as a weapon‑supporting technology. Cheeseman linked the design to industrial decarbonisation, citing hard‑to‑abate sectors such as steel making and hydrogen production as obvious customers. He said higher heat output and steady baseload make the reactor a candidate for processes that can't easily electrify.
Beyond domestic use, Rolls‑Royce sees export markets where grid infrastructure is thin or absent. Cheeseman pointed to mining operations and isolated industrial sites overseas that need steady electricity and heat. "If you take it beyond the UK… some of them don’t have a grid at all… why not deploy… an array of these smaller reactors," he said, sketching out a business case based on modular scaling and repeatable delivery.
The export pitch has already found a commercial steer with Amentum's appointment as programme delivery partner. On 20 January 2026 Amentum, a US‑listed engineering and technical services firm, was named as the programme delivery partner for the first Rolls‑Royce SMR deployments in the UK and the Czech Republic. John Heller, Amentum’s chief executive, said the collaboration aims to mobilise the company’s delivery and project controls expertise to help get units on time and on budget. Loren Jones, Amentum’s senior vice‑president, said the partnership would support Rolls‑Royce’s growth plans and job creation in the UK.
Industrial economics and supply‑chain effects
Combining defence contracts and export sales would give Rolls‑Royce and its suppliers more predictable work and cashflow. The UK government has already signalled heavy support for modular nuclear technologies: in late 2025 ministers announced a plan to site Rolls‑Royce SMRs at Wylfa and pledged public money to jump‑start the sector. Government money lowers market risk and helps UK suppliers invest in factories and skills.
Chris Cholerton, chief executive of Rolls‑Royce SMR, said the Amentum tie‑up strengthens the company’s delivery capability and supply‑chain reach. Ruth Todd CBE, the firm’s operations and supply‑chain director, said the collaboration brings specialist skills and wider geographic reach to help execute programmes in multiple markets.
Suppliers and investors want to know how many reactors will be ordered and under what kinds of contracts. Rolls‑Royce has argued that AMRs — and SMRs generally — can be factory‑built and dispatched, lowering on‑site labour and schedule risk. But scaling that manufacturing model requires predictable demand, export wins and a mature component supply chain. Contracts that guarantee payments for fuel or capacity would help convert prospective customers into confirmed orders.
Cheeseman touched on one such lever: the ability to pay upfront for fuel, which he said gives cost certainty over extended periods. That payment model shifts some pricing risk away from operators and could make project economics more bankable for long‑term financing.
Investor and fiscal implications
For investors, the AMR proposition sits between defence procurement and energy infrastructure. Defence buyers prize resilience and sovereign capability. Energy buyers care about levelised costs and regulatory approval. The crossover could attract a mixed funding base — government offtakes, defence contracts, private offtake agreements and export project finance.
That blended demand profile helps explain why Rolls‑Royce has pursued both public backing and commercial partners. Public money reduces short‑term market risk.
Private partners bring delivery expertise and international reach. Amentum’s appointment amounts to a de‑risking move on the construction and programme management side.
Investors will demand clear certification and licensing timelines — and proof that sales will repeat beyond one-off pilots. Regulatory approval for novel reactor technologies is neither fast nor cheap. Rolls‑Royce and partners will need to demonstrate safety cases to nuclear regulators in multiple jurisdictions — and that takes time and capital.
Costs are the sticking point: factory-built SMRs promise savings, but only if manufacturers secure steady orders and a mature supply chain. A Guardian report in November 2025 noted the government planned an initial investment of £2.5bn for Rolls‑Royce’s SMR rollout at Wylfa, and that the company planned factory manufacture in Derby. It also recorded diplomatic friction after the US envoy urged consideration of an American supplier for large reactors. That episode underlines the geopolitical dimensions of energy procurement and how they can affect cost and supply decisions.
Where the money might come from
Rolls‑Royce’s route to finance is likely to run through several channels. For domestic deployments the government can underwrite early risk through direct capital injections, loan guarantees or long‑term contracts. Defence customers may buy units outright or pay for capability under multi‑year service contracts. Overseas projects will lean on export credit agencies, project finance banks and local partners.
Public‑private structures — with pre‑agreed revenue streams from state buyers — will be the easiest way to attract large institutional capital. Private investors may be less patient without those guarantees.
For the UK economy, the upside is jobs and high‑value manufacturing growth. Amentum’s announcement promised more than 8,000 British jobs linked to the first SMR deployments, a detail that underlines the political appeal of the programme in a government keen to show industrial returns from energy policy.
Bottom line: the Rolls‑Royce pitch at UDT was deliberately dual‑track — military resilience sold alongside a civil export market. That positioning is practical for closing early defence orders while the civil market matures.
One‑sentence paragraph for impact.
Investors and ministers now face a test: match the technical claims with finance and delivery discipline.
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"The resilience that this kind of product would offer… being able to fuel for between five and seven years… is very attractive," said Mark Cheeseman, Programme Executive, Rolls‑Royce AMR team.
This article was created with AI assistance.
