Terrestrial Energy, Westinghouse Sign Expanded Contract for IMSR Advanced Nuclear Fuel Plant at Springfields
Terrestrial Energy (NASDAQ: IMSR) signed an expanded manufacturing and supply contract with Westinghouse’s Springfields to design and build an IMSR fuel pilot plant, with construction starting in 2026. The expanded scope covers deconversion, fabrication, packaging and transportation to support scaling to commercial fuel production for future IMSR plants.
The pilot plant design includes a re-optimized chemical process to produce UF4 deconverted from UF6 at 5% enrichment, enabling use of SALEU (under 5% U-235) and leveraging Springfields’ ~80-year SALEU manufacturing legacy. The deal complements Terrestrial Energy’s selection in U.S. DOE advanced reactor and fuel pilot programs and aims to accelerate IMSR commercialization while using established transport and regulatory protocols.
Terrestrial Energy (NASDAQ: IMSR) ha firmato un contratto ampliato di produzione e fornitura con gli stabilimenti Springfields di Westinghouse per progettare e costruire una pianta pilota di combustibile IMSR, con la costruzione che inizierà nel 2026. L'ambito ampliato comprende deconversione, fabbricazione, imballaggio e trasporto per supportare la scalabilità verso la produzione commerciale di combustibile per i futuri impianti IMSR.
Il progetto della pianta pilota include un processo chimico ri-ottimizzato per produrre UF4 deconvertito da UF6 con arricchimento al 5%, consentendo l'uso di SALEU (meno del 5% di U-235) e sfruttando l'eredità di produzione di SALEU di circa 80 anni dei Springfields. L'accordo si integra con la selezione di Terrestrial Energy nei programmi DOE statunitensi per reattori avanzati e piloti di combustibile e mira ad accelerare la commercializzazione dell’IMSR utilizzando protocolli di trasporto e regolamentazione consolidati.
Terrestrial Energy (NASDAQ: IMSR) firmó un contrato ampliado de fabricación y suministro con los Springfields de Westinghouse para diseñar y construir una planta piloto de combustible IMSR, con la construcción que comenzará en 2026. El alcance ampliado abarca desconversión, fabricación, embalaje y transporte para respaldar la escalabilidad hacia la producción comercial de combustible para futuras plantas IMSR.
El diseño de la planta piloto incluye un proceso químico reoptimizado para producir UF4 desconvertido de UF6 con enriquecimiento del 5%, lo que permite el uso de SALEU (menos del 5% de U-235) y aprovecha el legado de fabricación de SALEU de alrededor de 80 años de los Springfields. El acuerdo complementa la selección de Terrestrial Energy en los programas piloto de reactores avanzados y combustible del DOE de EE. UU. y tiene como objetivo acelerar la comercialización del IMSR utilizando protocolos de transporte y regulación ya establecidos.
테라레스트리얼 에너지 (나스닥: IMSR)가 Westinghouse의 Springfields와 확장된 제조 및 공급 계약을 체결하여 IMSR 연료 파일럿 플랜트를 설계 및 구축하고, 건설은 2026년에 시작됩니다. 확장된 범위에는 상용 연료 생산으로의 확장을 지원하기 위한 비전환, 제조, 포장 및 운송이 포함됩니다.
파일럿 플랜트 설계에는 5% 농축 UF4를 UF6에서 다시 전환한 재합성 공정이 포함되어 SALEU(5% U-235 이하)의 사용을 가능하게 하고 약 80년의 SALEU 제조 레거시를 가진 Springfields를 활용합니다. 이 계약은 미국 DOE의 차세대 원자로 및 연료 파일럿 프로그램에서 Terrestrial Energy의 선택을 보완하며 IMSR 상용화를 가속화하고 확립된 운송 및 규제 프로토콜를 사용하려는 목표를 갖습니다.
Terrestrial Energy (NASDAQ: IMSR) a signé un contrat élargi de fabrication et d'approvisionnement avec les sites Springfields de Westinghouse pour concevoir et construire une centrale pilote de combustible IMSR, dont la construction commencera en 2026. Le champ d'application élargi couvre la déconversion, la fabrication, l'emballage et le transport afin de soutenir l'augmentation de la production de carburant commercial pour les futures installations IMSR.
La conception de la centrale pilote comprend un processus chimique ré-optimisé pour produire UF4 déconverti de UF6 à enrichissement de 5%, permettant l'utilisation de SALEU (en dessous de 5% U-235) et tirant parti de l'héritage de fabrication SALEU d'environ 80 ans des Springfields. L'accord complète la sélection de Terrestrial Energy dans les programmes pilotes avancés des réacteurs et carburants du DOE américain et vise à accélérer la commercialisation de l'IMSR tout en utilisant des protocoles de transport et de réglementation établis.
Terrestrial Energy (NASDAQ: IMSR) hat einen erweiterten Herstellungs- und Liefervertrag mit Westinghouses Springfields unterzeichnet, um eine IMSR-Brennstoff-Pilotanlage zu entwerfen und zu bauen, mit Baubeginn im 2026. Der erweiterte Umfang deckt Dekonversion, Herstellung, Verpackung und Transport ab, um die Skalierung zur kommerziellen Brennstoffproduktion für zukünftige IMSR-Anlagen zu unterstützen.
Das Design der Pilotanlage umfasst einen neu optimierten chemischen Prozess zur Herstellung von UF4, das aus UF6 mit 5% Anreicherung dekonvertiert wird, wodurch die Verwendung von SALEU (unter 5% U-235) ermöglicht wird und auf die ca. 80 Jahre währende SALEU-Herstellungstradition von Springfields zurückgegriffen wird. Der Deal ergänzt die US-DOE-Auswahl von Terrestrial Energy in fortgeschrittenen Reaktor- und Brennstoff-Pilotprogrammen und zielt darauf ab, die IMSR-Kommerzialisierung zu beschleunigen, während etablierte Transport- und Regulierungsprotokolle genutzt werden.
Terrestrial Energy (ناسداك: IMSR) وقعت عقد تصنيع وتوريد موسّع مع مصانع Springfields التابعة لـ Westinghouse لتصميم وبناء مصنع تجريبي لوقود IMSR، على أن يبدأ البناء في 2026. يغطي النطاق الموسّع إزالة التحويل، التصنيع، التعبئة والنقل لدعم التوسع إلى إنتاج وقود تجاري لمحطات IMSR المستقبلية.
تصميم مصنع التجريبي يتضمن عملية كيميائية مُعاد تحسينها لإنتاج UF4 مُحوَّل من UF6 بارتفاع تخصيب 5%، مما يمكّن استخدام SALEU (أقل من 5% من U-235) والاستفادة من التراث الصناعي لـ SALEU الذي يقدّر بـ حوالي 80 عامًا لدى Springfields. الصفقة تكمل اختيار Terrestrial Energy ضمن برامج DOE الأمريكية للوقود والوقود المكونات للمفاعلات المتقدمة وت هدف إلى تسريع تسويق IMSR باستخدام بروتوكولات النقل والتنظيم المعتمدة.
- Construction start date set for 2026
- Expanded scope includes deconversion, fabrication, packaging, transportation
- Pilot design enables UF4 from UF6 at 5% enrichment
- Leverages Springfields’ nearly 80-year SALEU manufacturing legacy
- None.
Insights
Expanded Westinghouse contract advances fuel supply and pilot plant build, materially supporting IMSR commercialization.
The agreement secures deconversion, fabrication, packaging and transportation services at Westinghouse Springfields for a pilot fuel plant, with construction starting in
These facts imply a clearer, operationally anchored supply chain for IMSR fuel because the pilot uses existing commercial infrastructure and established transport/regulatory protocols for SALEU. Key dependencies and risks are the pilot plant achieving design targets and timely construction; regulatory approvals and operational commissioning within the stated timeline; and successful demonstration of the UF4 deconversion process at scale. Monitor construction progress in
Agreement encompasses deconversion, fabrication, packaging, and transportation services for Integral Molten Salt Reactor (IMSR) fuel production, paving the way for pilot plant construction
Partnership with Westinghouse’s Springfield Fuels advances Terrestrial Energy’s Western supply chain strategy while accelerating IMSR commercialization pathway
CHARLOTTE, N.C., Nov. 05, 2025 (GLOBE NEWSWIRE) -- Terrestrial Energy Inc. (NASDAQ: IMSR) (“Terrestrial Energy” or “the Company”), a developer of small modular nuclear power plants using its Generation IV reactor technology, today announced it has signed a manufacturing and supply contract with Springfields Fuels Limited, a subsidiary of Westinghouse Electric Company (“Westinghouse”), for the design and construction of an Integral Molten Salt Reactor (IMSR) fuel pilot plant. The agreement serves as a significant advancement of Terrestrial Energy’s fuel supply chain capabilities in support of the Company’s accelerating commercialization pathway, with construction set to begin in 2026.
The agreement, building on a contract signed in August 2023 for the planning and initial design of IMSR fuel supply, leverages established deconversion and fuel manufacturing infrastructure at Westinghouse’s Springfields nuclear fuel manufacturing site in Preston, United Kingdom, to support Terrestrial Energy's IMSR deployment strategy. The expanded scope includes a wide range of commercial-scale fuel services, such as deconversion, fabrication, packaging and transportation. Upon completion of the pilot plant, the facility will be positioned to scale to commercial fuel production for a future fleet of IMSR Plants.
Terrestrial Energy’s IMSR plant uses next-generation molten salt reactor technology – a Generation IV nuclear technology – to deliver high-temperature thermal energy. This energy supports highly efficient steam turbine operation, low-cost electricity generation and direct thermal energy supply for industrial use. Unique among North American Generation IV designs, the IMSR is fueled with low-cost, readily available Standard Assay Low-Enriched Uranium (SALEU) fuel, uranium enriched to under
Terrestrial Energy’s use of SALEU, the only commercially available reactor fuel on the market today, for IMSR plant operation shields the Company from substantial supply challenges associated with the use of High-Assay Low-Enriched Uranium fuel (HALEU), which have been exacerbated by geopolitical tensions and the current lack of commercial-scale supply in the U.S. market. SALEU supply chains are supported by well-established international transport protocols and decades of regulatory acceptance, positioning Terrestrial Energy to pursue a practical and accelerated pathway to early commercial IMSR plant deployment.
“This expanded partnership with Westinghouse at Springfields represents a strategic milestone in Terrestrial Energy’s Western supply chain strategy as we continue to advance commercialization of our Generation IV reactor technology,” said Simon Irish, CEO of Terrestrial Energy. “With our SALEU fuel choice, we can maximize the use of existing nuclear industrial infrastructure at the Springfields site for capital efficiency. This collaboration enhances both our capital efficiency and scalability as we seek to meet the rapidly growing demand for clean, reliable, and flexible energy supply.”
“We are delighted to continue our partnership with Terrestrial Energy to develop a next-generation nuclear fuel at Springfields to power molten salt reactors,” said Tarik Choho, Westinghouse President of Nuclear Fuel. “We have been working with Terrestrial Energy now for more than 4 years on this transformative initiative. This partnership brings together complementary strengths and opportunities, accelerating innovation and delivering important impacts to our industry.”
A key innovation in the pilot plant design is a re-optimized chemical process to supply UF4 deconverted from UF6 at
Terrestrial Energy is working collaboratively with other organizations across the nuclear fuel supply chain to establish multiple sources for IMSR fuel production and supply. These partnerships ensure that the company’s advanced reactor technology is supported by a robust and secure fuel supply infrastructure, critical to commercial IMSR deployment.
SALEU fuel is transportable using existing packages, for civilian reactor use, with a process that sits within the existing regulatory and safety protocol that has been established across many markets for the safety and secure transport of the nuclear fuel across international borders. These characteristics present competitive advantages for Terrestrial Energy as the company pursues its first IMSR deployments at site in the United States including at Texas A&M’s RELLIS campus.
Today’s announcement follows a series of announcements underscoring the acceleration of Terrestrial IMSR commercialization plans, most recently punctuated by the Company’s selection for the U.S. Department of Energy (DOE) Office of Nuclear Energy’s Advanced Reactor Pilot Program, as well as the U.S. DOE Office of Nuclear Energy’s Fuel Line Pilot Program. Together, these programs provide a pathway to significantly accelerate Terrestrial Energy’s IMSR commercialization.
About Terrestrial Energy
Terrestrial Energy is a developer of Generation IV nuclear plants that use its proprietary Integral Molten Salt Reactor (IMSR). The IMSR captures the transformative operating benefits of molten salt reactor technology in a plant design that represents true innovation in capital efficiency, cost reduction, versatility and functionality of nuclear energy supply. IMSR plants are designed to be small and modular for distributed supply of low-cost, reliable, dispatchable, clean, high-temperature industrial heat and electricity, and to be customized for dual-use energy role relevant to many industrial applications, such as petrochemical and chemical synthesis, and data center operation. In so doing, IMSR plants extend the application of nuclear energy far beyond electric power markets. Their deployment will support the rapid global decarbonization of the primary energy system across a broad spectrum and increase its sustainability. Terrestrial Energy uses an innovative plant design together with proven and demonstrated molten salt reactor technology and standard nuclear fuel for a nuclear plant with a unique set of operating characteristics and compelling transformative commercial potential. Terrestrial Energy is engaged with regulators, suppliers, industrial partners and energy end-users to build, license and commission the first IMSR plants in the early 2030s.
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A photo accompanying this announcement is available at https://www.globenewswire.com/NewsRoom/AttachmentNg/157e44b2-3f0e-4506-ba2d-0a90ccfe5450
FAQ
What did Terrestrial Energy announce about IMSR fuel production on November 5, 2025?
How does the Springfields contract affect IMSR fuel supply for IMSR (NASDAQ: IMSR)?
What fuel type will IMSR use under the Springfields agreement for IMSR (NASDAQ: IMSR)?
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Does the Springfields partnership change Terrestrial Energy’s commercialization timeline for IMSR (NASDAQ: IMSR)?
How does the Springfields deal relate to U.S. DOE programs for IMSR (NASDAQ: IMSR)?
