The nuclear reactor design industry revolves around creating structures and systems responsible for harnessing, controlling and converting nuclear energy into usable power. The key players in this field are businesses like Idaho National Laboratory, Areva, and Ansaldo Energia, all of which specialize in engineering advanced and innovative nuclear reactors. These reactors are vital for various applications including propulsion, heat generation, water desalination and hydrogen production. As the world continues gravitating towards cleaner, more sustainable energy sources, this industry is likely to see an escalation in the demand and development of advanced nuclear reactor designs that are more efficient, safer, and environmentally friendly.


Top 22 Nuclear Reactor Design Companies

1. Idaho National Laboratory

  • Website: inl.gov
  • Headquarters: Idaho Falls, Idaho, United States
  • Founded: 1949
  • Headcount: 5001-10000
  • Latest funding type: Grant
  • LinkedIn

The company, INL, specializes in building advanced nuclear reactors for this century. They offer innovative applications for maritime propulsion, space technologies, decarbonized heat generation, water desalination, and hydrogen production. They aim to provide abundant clean energy to the world.


2. Areva

  • Website: areva.com
  • Headquarters: Paris La Defense, France, France
  • Founded: 2001
  • Headcount: 10001+
  • LinkedIn

AREVA is a nuclear energy company that specializes in designing, building, maintaining, and advancing nuclear power plants worldwide. They offer innovative solutions and value-added technologies for the global nuclear fleet. With expertise in component manufacturing, fuel production, and reactor services, AREVA plays a major role in the nuclear energy market.


3. Ansaldo Energia

  • Website: ansaldoenergia.com
  • Headquarters: Genova, Liguria, Italy
  • Founded: 1853
  • Headcount: 1001-5000
  • Latest funding type: Private Equity
  • LinkedIn

Ansaldo Energia is a company that focuses on safety, security, quality, and sustainability in the nuclear energy sector. They offer innovative solutions for future nuclear technologies, including fusion, Generation IV, and small modular reactors. They also specialize in nuclear plant EPC contracting and system integration, as well as decommissioning and waste treatment solutions. Their services include optimization of emission and performance for gas turbines, steam turbines, and turbomachinery. Ansaldo Energia aims to provide efficient and sustainable energy solutions for the future.


4. BWX Technologies, Inc.

  • Website: bwxt.com
  • Headquarters: Lynchburg, Virginia, United States
  • Founded: 1867
  • Headcount: 5001-10000
  • Latest funding type: Post Ipo Debt
  • LinkedIn

BWXT is a nuclear technology company that specializes in a wide range of products and services related to nuclear power, such as naval nuclear propulsion, commercial nuclear components, nuclear fuel, and strategic nuclear materials. They also provide complex operations management, environmental management, nuclear medicine, research, and advanced technologies.


5. GE Power & Water

  • Website: gepower.com
  • Headquarters: Alvaro Obregon, Cdmx, Mexico
  • Founded: 1998
  • Headcount: 10001+
  • LinkedIn

GE Hitachi Nuclear Energy (GEH) is a world-leading provider of advanced reactor technology, fuel, and nuclear services. They offer solutions and services in the nuclear power industry, including the BWRX-300, NATRIUM, ESBWR, ABWR, and PWR technologies.


6. Invap

  • Website: invap.com.ar
  • Headquarters: San Carlos De Bariloche, Rio Negro, Argentina
  • Founded: 1976
  • Headcount: 1001-5000
  • LinkedIn

INVAP is a world-class model in technological projects and the leader of development in Argentina. With over 40 years of experience, INVAP develops high-end technological systems in the areas of Nuclear, Aerospace, Defense, Security & Environment, and Medical Systems.


7. Cavendish Nuclear

Cavendish Nuclear is a leading company in the nuclear industry, providing integrated solutions for clean energy, defence, civil decommissioning, and technology. They offer engineering and safety consultancy, nuclear infrastructure design and build, nuclear equipment design and manufacture, nuclear operations, and decommissioning and waste management services. With a highly skilled workforce and expertise in the field, they are the largest employer of nuclear specialists in the UK. Cavendish Nuclear is committed to sustainability and is a key player in the global nuclear industry.


8. NuScale Power

  • Website: nuscalepower.com
  • Headquarters: Corvallis, Oregon, United States
  • Founded: 2007
  • Headcount: 201-500
  • Latest funding type: Post Ipo Equity
  • LinkedIn

NuScale Power is a leading developer of Small Modular Reactor (SMR) technology. They offer smarter, cleaner, safer, and cost-competitive nuclear energy solutions. With their innovative features and functionality, NuScale's small modular reactor technology is revolutionizing the industry.


9. Kairos Power

  • Website: kairospower.com
  • Headquarters: Alameda, California, United States
  • Founded: 2016
  • Headcount: 201-500
  • Latest funding type: Grant
  • LinkedIn

Kairos Power is a mission-driven engineering company focused on delivering clean, affordable, and safe energy solutions. They specialize in advanced reactor technology and are committed to reducing long-term costs while providing a near zero carbon footprint and low water consumption. With a robust and inherently safe design, they aim to create a path towards a truly clean energy system.


10. Hitachi-GE Nuclear Energy, Ltd.

  • Website: hitachi-hgne.co.jp
  • Headquarters: Tokyo, Tokyo, Japan
  • Founded: 2007
  • Headcount: 1001-5000

Hitachi-HGNE is a nuclear technology company that offers CO2-free nuclear power products and services to support sustainable future energy. The company leads the development of nuclear technologies and supports comfortable future energy.


11. Paragon Energy Solutions

  • Website: paragones.com
  • Headquarters: Fort Worth, Texas, United States
  • Founded: 2000
  • Headcount: 201-500
  • Latest funding type: Acquired
  • LinkedIn

Paragon is a forward-thinking collaborative partner that develops innovative nuclear solutions. They aim to make nuclear solutions safer, more reliable, and cost-efficient.


12. WECTEC, subsidiary of Westinghouse, LLC

  • Website: mnes-us.com
  • Headquarters: Charlotte, North Carolina, United States
  • Founded: 2006
  • Headcount: 51-200
  • LinkedIn

Mitsubishi Nuclear Energy Systems (MNES) offers nuclear service technologies and methods to US companies, ensuring the safety and longevity of the American nuclear fleet. MNES provides replacement components, services, and technologies to US utilities operating pressurized water reactor nuclear power plants. They also offer the US-APWR nuclear power reactor design, contributing to America's energy independence and providing clean, safe nuclear energy. MNES has a diverse workforce and fosters employee growth.


13. Terrestrial Energy

Terrestrial Energy is a technology company that offers carbon-free and cost-competitive nuclear energy through its transformative advanced reactor, the Integral Molten Salt Reactor (IMSR®). Their innovative technology allows for the generation of high-temperature heat and electric power for various industrial uses, with significantly reduced carbon emissions compared to fossil fuel burning. They aim to revolutionize the energy industry by providing a scalable, reliable, and economical alternative to traditional nuclear power plants.


14. Radiant

  • Website: radiantnuclear.com
  • Headquarters: El Segundo, California, United States
  • Founded: 2019
  • Headcount: 11-50
  • Latest funding type: Series A
  • LinkedIn

Radiant Nuclear is a company that specializes in the development and production of compact nuclear reactors. Their flagship product, Kaleidos, offers a safe and efficient alternative to traditional diesel generators for power generation. With advanced technology and high-energy density, Kaleidos eliminates the need for expensive and dirty diesel fuel, unreliable power grids, and long deployment timelines.


15. OJSC Nikiet

  • Website: nikiet.ru
  • Headquarters: Moscow, Moscow, Russian Federation
  • Founded: 2009
  • Headcount: 11-50
  • LinkedIn

NIKIET is a company that offers various services in the field of nuclear energy. It specializes in research and development, engineering, and consulting for nuclear power plants.


16. NINE Nuclear and INdustrial Engineering S.R.L.

NINE Nuclear and Industrial Engineering is a private company specializing in Nuclear Fission power plant technology. Our services include Licensing, Safety Analysis, Computer Codes development, NPP design and optimization, Test facilities Design, and Consulting.


17. Blue Wave AI Labs

  • Website: bluewaveailabs.com
  • Headquarters: West Lafayette, Indiana, United States
  • Founded: 2016
  • Headcount: 11-50
  • Latest funding type: Grant
  • LinkedIn

Blue Wave AI Labs is a trusted leader in AI solutions for the nuclear industry. They use advanced AI and machine learning techniques to transform data into critical intelligence and provide game-changing solutions. Their expertise includes assessing situational balance of power, establishing nuclear power plants as reliable clean-energy sources, and improving operational efficiency and safety. They offer powerful AI-centric products such as BWnuclear.ai software suite for reload core design and cycle management applications. With their specialized and innovative approaches, they help mitigate risk, increase efficiency, and solve complex challenges.


18. Nano Nuclear Energy Inc.

NANO Nuclear Energy is a DeepTech company focused on designing and developing its own novel Nano reactors and engages in optimization research for µSMRs. The company seeks to provide Smaller, Cheaper, and Safer nuclear energy solutions for residential, commercial, mining, industrial, military, medical use, and construction projects.


19. Dual Fluid

Dual Fluid is a nuclear technology company that offers a clean, affordable, and emission-free energy source based on the new Dual Fluid reactor design.


20. Zachry Nuclear Engineering

  • Website: zachrynuclear.com
  • Headquarters: Groton, Connecticut, United States
  • Headcount: 51-200

Zachry Nuclear is a company singularly focused on the nuclear industry, providing robust engineering, design and project management services to support safe and efficient operation of nuclear power plants.


21. PRoAtom

  • Website: proatom.ru
  • Headquarters: Saint Petersburg, Saint Petersburg City, Russian Federation
  • Founded: 1996
  • Headcount: 11-50

Proatom is a company involved in the nuclear power industry. They offer various services and products related to the design, construction, and operation of nuclear power plants.


22. Studsvik

  • Website: studsvik.com
  • Headquarters: Solna, Stockholms Lan, Sweden
  • Founded: 1947
  • Headcount: 501-1000
  • Latest funding type: Ipo
  • LinkedIn

Studsvik AB is a global company offering decommissioning and radiation protection services, engineering services, waste management technology, and software products. With a focus on nuclear sustainability, Studsvik provides operation support, reactor design and performance optimization, and spent fuel analysis and storage optimization. The company serves a wide range of industries, including nuclear power plants, waste management facilities, and engineering firms.


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