TerraPower UK Ltd is a new subsidiary formed by TerraPower to serve as the company's operational base for all UK activities including generic design assessment engagement. This is TerraPower's first office outside the United States.
Paragon Energy Solutions, a Mirion Technologies company, is a leading supplier of safety-related products and components for the nuclear industry. The company produces the Highly Integrated Protection System (HIPS) platform used in digital instrumentation and control systems for nuclear reactors. Paragon has delivered comprehensive solutions for nuclear industry needs for more than three decades.
Blykalla is a Swedish advanced-reactor developer commercializing its Swedish Advanced Lead Reactor, or SEALER, platform. Its technology focus is compact, passively safe lead-cooled reactors, including the 55-MW SEALER-55, enabled by proprietary aluminium-alloyed steels intended to resist liquid-lead corrosion. On 18 May 2026, Blykalla announced that it had applied to the Swedish government to develop a six-reactor advanced nuclear park at Norrsundet with planned capacity of approximately 330 MW.
Elementl Power is a U.S. advanced-nuclear project developer that develops, finances, and delivers utility-scale next-generation nuclear plants from site selection through commercial operation. The platform is technology agnostic, although its Southeast Ohio project has selected GE Vernova Hitachi's BWRX-300 small modular reactor under an Early Works Agreement. In April 2026, Elementl filed a PJM transmission interconnection request for the first 600 MW of its potential up-to-1.5-GW Meigs County project.
Nordic Baseload Power is a Swedish energy company that submitted an application for state aid to build two full-scale boiling water reactors generating 2,500 MWe at Barseback in southern Sweden.
NuScale Power Corporation develops and commercializes advanced small modular reactor nuclear technology for electric-power and industrial applications. Its NuScale Power Module is a 77 MWe/250 MWt pressurized-water reactor that can be deployed in configurations of up to 12 modules. In August 2026, NuScale reported continued work toward an ENTRA1–TVA power-purchase agreement, progress on the six-module RoPower project in Romania, and a Paragon final-design contract for its safety-related Highly Integrated Protection System.
Rolls-Royce SMR develops standardized, factory-built small modular nuclear power stations. Its design is a three-loop, close-coupled pressurized-water reactor producing 1,358 MWt of heat, with a boron-free primary circuit and multiple safety, redundancy and backup systems. On 13 April 2026, Rolls-Royce SMR and Great British Energy–Nuclear signed a contract to begin site-specific design, regulatory engagement, planning and critical-component procurement for three units at Wylfa in North Wales.
GE Vernova, through the GE Vernova Hitachi Nuclear Energy alliance, provides advanced reactor designs, nuclear fuel and nuclear lifecycle services. Its small modular reactor focus is the BWRX-300, a simplified boiling-water reactor designed for up to 300 MW of electricity and using passive safety features, commercially available fuel and modular construction techniques. On 13 August 2026, GE Vernova Hitachi and Blue Energy agreed to advance engineering design, licensing and safety analysis for a planned 2.5-GW gas-plus-nuclear project in Victoria, Texas, subject to a 2027 final investment decision.
Westinghouse Electric Company supplies nuclear technology and services spanning new plants, operating-plant services, nuclear fuel and advanced reactors. Its principal reactor offerings include the AP1000 Generation III+ pressurized-water reactor, the AP300 330-MWe SMR based on AP1000 technology, and the eVinci microreactor. On 4 August 2026, Westinghouse and Amentum announced agreements to expand delivery capacity for AP1000 fleet deployment and to advance AP300 development and U.S. Nuclear Regulatory Commission licensing.
Akkuyu Nuclear JSC is the project company established by Rosatom to build, own, and operate Turkey's first nuclear power plant at Akkuyu under a Build-Own-Operate model. The plant will comprise four VVER-1200 reactors with a total capacity of 4800 MWe.
South Africa-based Allweld Nuclear and Industrial is an engineering solutions company serving the nuclear sector since the early 1960s. The company signed an MOU with Deep Geo Inc to support construction, operation and maintenance of nuclear projects in Africa.
Atomstroyexport, engineering division of Rosatom. General designer and general contractor for Kudankulam NPP Units 3-6 in India. Director of Projects in India is Mikhail Novikov.
Blue Bird Energy is a Bulgarian company focused on deploying small modular reactors. It signed a Letter of Intent with Poland's Synthos Green Energy in January 2026 for a joint venture to build up to six BWRX-300 SMRs in Bulgaria.
TerraPower develops advanced nuclear-energy and isotope technologies for carbon-free electricity, industrial decarbonization and medical applications. Its Natrium system combines a 345-MWe sodium-cooled fast reactor with molten-salt energy storage that can increase output to 500 MWe. On 4 March 2026, TerraPower announced that the U.S. Nuclear Regulatory Commission had voted to issue a construction permit for Kemmerer Unit 1 in Wyoming, its Natrium project and the first commercial-scale advanced nuclear plant to receive such a permit.
Rosatom State Atomic Energy Corporation provides integrated nuclear-energy offerings that include plant design and construction, fuel supply, operations and maintenance, spent-fuel and radioactive-waste management, and decommissioning. Its portfolio includes Generation III+ VVER plants and land-based and floating SMR solutions built around the water-cooled RITM-200N reactor. In June 2026, construction began on Uzbekistan's first integrated nuclear power plant after the regulator issued a construction licence for an RITM-200N unit; the planned project comprises two VVER-1000 units and two 55-MWe RITM-200N units.
Terrestrial Energy develops small modular nuclear plants for dispatchable, carbon-free industrial heat and electricity. Its Generation IV Integral Molten Salt Reactor uses molten-fluoride salt as coolant and fuel, standard-assay low-enriched uranium, and a sealed, replaceable reactor core unit. On 12 May 2026, the company announced that the U.S. Nuclear Regulatory Commission issued a Safety Evaluation Report approving its IMSR Postulated Initiating Events Topical Report, a further foundational element of the reactor's licensing basis.
Korea Hydro & Nuclear Power is a South Korean power-generation company that develops and operates nuclear assets and pursues overseas energy projects. Its nuclear fleet and development expertise include the APR1400, a 1,400-MW pressurized-water reactor used at Saeul Units 3 and 4. On 20 January 2026, TerraPower announced that KHNP had joined its investor base through SK's investment, with the companies planning commercialization cooperation for the Natrium advanced-reactor programme.
Oklo Inc. is developing fast-fission power plants, advanced nuclear-fuel recycling and fabrication capabilities, and critical-radioisotope businesses. Its Aurora technology uses liquid-metal-cooled, metal-fuelled fast reactors designed for passive, self-stabilizing operation and potential use of recycled fuel. On 11 June 2026, the U.S. Department of Energy's Idaho Operations Office approved the Preliminary Documented Safety Analysis for Aurora-INL under the Reactor Pilot Program, advancing preliminary safety review for Oklo's first planned fast-fission plant.
Newcleo develops advanced modular reactors and an integrated nuclear-fuel business covering reactor design, research and development, engineering, procurement and construction services, and MOX-fuel manufacturing. Its technology focus is Generation IV lead-cooled fast reactors using mixed-oxide fuel made from reprocessed nuclear materials, with the stated objective of closing the fuel cycle and reducing waste liabilities. On 10 August 2026, Newcleo and NewHold Investment Corp. III announced in an SEC-filed release that the SEC had declared effective Newcleo's Form F-4 registration statement for their proposed business combination and Nasdaq listing, subject to shareholder approval and customary closing conditions.
Holtec International is a nuclear-energy technology company specializing in spent-fuel storage, small modular reactors and nuclear-plant decommissioning. Its principal advanced-reactor design is the SMR-300, a pressurized-water SMR rated at approximately 1,000 MWth and more than 320 MWe net per unit, with passive-safety features and an 80-year design life. On 17 February 2026, the U.S. Nuclear Regulatory Commission accepted Holtec SMR, LLC's Limited Work Authorization application for two SMR-300 Pioneer units at the Palisades Energy Center, initiating formal review. In September 2026, Holtec's IPO entity, Holtec Nuclear Corp, filed to raise up to $900 million on Nasdaq (50 million shares at $15-18 each) but suspended the offering on September 16, citing market conditions shortly before its expected pricing date.
Framatome designs and supplies nuclear power-plant equipment, nuclear steam supply systems, fuel, instrumentation and control systems, and lifecycle services. Its advanced-reactor work includes fuel and component design and manufacturing, engineering, licensing and prospective operations and maintenance across reactor technologies including SMRs. On 23 July 2026, Framatome announced that the U.S. Nuclear Regulatory Commission approved a licence amendment for its Richland, Washington, fuel facility to manufacture fuel enriched up to 10%, expanding domestic advanced-reactor fuel-manufacturing capacity.
Subsidiary of CNNC that jointly developed the Chaotan One supercritical CO2 waste-heat power generation technology. Core technical institute for China's nuclear power development.
Aecon Nuclear is Canada's leading nuclear construction contractor and a supply chain partner for both TVA's Clinch River BWRX-300 project and OPG's Darlington SMR programme. The company has decades of experience constructing and maintaining Canadian nuclear plants. Aecon's selection as a TVA supply chain partner reflects the strong Canada-US nuclear supply chain integration developing around the BWRX-300 platform — the most construction-ready SMR design in the world.
Zeno Power develops radioisotope power systems (RPSs) for use in extreme environments including undersea and space applications. The company is restoring hot cell infrastructure at Vallecitos Nuclear Center for production of strontium-90-fueled nuclear batteries.
Kairos Power is a U.S. nuclear technology, engineering, and manufacturing company commercializing the KP-FHR, a fluoride salt-cooled, high-temperature reactor using TRISO pebble fuel and Flibe molten-fluoride-salt coolant in a low-pressure design. Its most significant recent development was the 2026-04-17 groundbreaking of Hermes 2 in Oak Ridge, Tennessee, its first commercial-scale, power-producing demonstration plant. Kairos says Hermes 2 is planned to provide up to 50 MWe to the Tennessee Valley Authority grid; the NRC issued its construction permits on 2024-11-21.