UK nuclear safety engineering firm specializing in reactor integrity assessment, environmental fatigue, severe accident analysis, and radioactive waste management.
Amentum Clean Energy (formerly Jacobs Clean Energy) is a UK-based private engineering and consultancy firm specializing in nuclear safety, reactor integrity assessment, and radioactive waste management. They provide technical expertise on structural integrity of nuclear power plants, environmental fatigue assessment of reactor components, and safety analysis for advanced reactor concepts including Generation IV designs. Their work spans the full nuclear lifecycle — from operational safety and long-term operation of existing light water reactors to spent fuel management and geological disposal of radioactive waste.
Coordinated both INCEFA-PLUS and INCEFA-SCALE (their two largest projects by funding), and participated in ATLASplus and MEACTOS — all focused on assessing and mitigating material degradation in reactor components.
Participated in MUSA (severe accident uncertainties), SOTERIA (radiation effects on reactor materials), and SafeG (GFR safety with innovative materials).
Third-party contributor to EURAD (European Joint Programme on Radioactive Waste Management) and participant in PUMMA (plutonium management for Gen-IV reactors).
Contributed to SafeG (gas-cooled fast reactor safety), GEMINI Plus (R&D for the GEMINI Initiative), and PUMMA (plutonium fuel cycle for Gen-IV).
Third-party contributor to DEMOCRITOS, focused on high-power nuclear electric propulsion systems for spacecraft.
Their early H2020 work (2015–2017) included nuclear electric propulsion for space applications (DEMOCRITOS), alongside foundational nuclear safety projects on reactor material aging and environmental fatigue. From 2019 onward, their focus consolidated firmly around nuclear safety and waste management — severe accident modelling, radioactive waste disposal, Gen-IV reactor safety, and plutonium management. The trajectory shows a company moving from broader nuclear engineering interests toward deep specialization in reactor safety assessment and back-end fuel cycle challenges.
Amentum is deepening its focus on nuclear safety for both current-generation and advanced (Gen-IV) reactors, with growing involvement in radioactive waste disposal — positioning them well as Europe accelerates new nuclear deployment.
Amentum mostly joins consortia as a specialist participant (7 of 11 projects), but has demonstrated leadership capability by coordinating two major projects in their core expertise area (INCEFA-PLUS and INCEFA-SCALE). With 188 unique consortium partners across 31 countries, they maintain a very broad European network, suggesting they are a well-connected and trusted technical contributor rather than a niche isolate. Their repeat coordination of the INCEFA programme shows they can sustain long-term research leadership when the topic aligns with their strengths.
Exceptionally well-networked for their size, with 188 unique partners across 31 countries built through 11 projects — indicating participation in large, pan-European nuclear research consortia. Their network spans the major nuclear research nations in Europe and beyond.
Amentum Clean Energy combines hands-on engineering consultancy with deep involvement in European nuclear research, bridging the gap between academic safety research and industrial application. Their sustained leadership of the INCEFA programme (two consecutive coordinated projects on environmental fatigue assessment) makes them a recognized authority in a very specific but critical niche. For consortium builders, they offer a rare profile: a private-sector partner with both the technical depth to contribute meaningfully to fundamental safety research and the engineering credibility to translate findings into practical plant assessments.
