# Rolls-Royce's submarine reactor business plans large-component prototyping at a Derby technology park Rolls-Royce expects the Derby technology park to expand capacity supporting submarine programmes while allowing its Raynesway site to focus on delivery. Published 2026-11-07 by TGOs. Canonical: https://tgos.io/news/2026/11/07/rolls-royces-submarine-reactor-business-plans-large-component-prototyping/ Rolls-Royce Submarines announced a partnership on Nov. 6 with INFINITY, a private company creating a technology park in Derby, to develop large-scale prototypes of advanced defence components.[1] Lee Warren, engineering and technology director at Rolls-Royce Submarines, said the park would allow the company to focus on delivery at Raynesway while developing advanced manufacturing techniques at purpose-built facilities.[1] Warren tied the need to explore new technologies to the business's growth to meet demand for naval nuclear propulsion work.[1] That includes increasing its manufacturing pace and providing reactors to Australia under the AUKUS agreement.[1] The planned capabilities include hot isostatic pressing, power beam welding and additive manufacturing.[1] Rolls-Royce expects these to provide greater control over manufacturing large, strategically important components for markets including fission, fusion, defence and aerospace.[1] The Rolls-Royce Nuclear Skills Academy already operates on the 200-acre site, where the company will work with INFINITY to develop the additional capabilities.[1] The park is intended to bring full-scale prototyping, digital engineering, testing and validation, skills development and supply chain collaboration together on one site.[1] Rolls-Royce Submarines designs, manufactures and supports the pressurised water reactors powering every Royal Navy submarine.[1] It currently supplies reactor plant and associated components for the Astute and Dreadnought build programmes.[1] ## Why it matters Rolls-Royce expects the new capabilities to shorten development cycles and expand the industrial capacity available to support submarine programmes.[1] The announcement gives no timetable for bringing those capabilities into use.[1] ## Sources 1. Rolls-Royce: Rolls-Royce Submarines partners with INFINITY to develop new capabilities for UK defence, Nov. 6, 2026