Website: [saltfoss.com](https://saltfoss.com) ### Introduction Seaborg Technologies, now rebranded as [[Saltfoss Energy]] as of April 2025, is a Danish startup founded in 2015 with a mission to provide safe, sustainable, and affordable nuclear power through innovative molten salt reactor technology. Headquartered in Copenhagen, Denmark, the company was established by a team of physicists, chemists, and engineers with backgrounds from prestigious institutions such as the Niels Bohr Institute, CERN, and the Technical University of Denmark (DTU). While exact employee counts are not publicly disclosed in the latest data, [[Saltfoss Energy]] remains a private company focused on revolutionizing nuclear energy with a compact and inherently safe reactor design. Their vision aligns with global efforts to decarbonize energy systems, targeting a future where nuclear power can be deployed at scale with minimal environmental impact. The rebranding to Saltfoss Energy reflects the company’s emphasis on its molten salt technology, with “foss” referencing a powerful waterfall in Old Norse, symbolizing the potential for massive energy generation through flowing salt. As a private entity, Saltfoss Energy does not have a public ticker symbol and operates primarily through private funding and strategic partnerships. The company has garnered attention for its unique approach to nuclear fission, aiming to address historical concerns around safety, cost, and waste in the nuclear industry [Wikipedia](https://en.wikipedia.org/wiki/Seaborg_Technologies), [World Nuclear News](https://www.world-nuclear-news.org/articles/denmarks-seaborg-changes-name-and-adds-to-board). ### Key Products and Technology - **Compact Molten Salt Reactor (CMSR) – Molten Salt Reactor** - **Technical Specifications**: Specific power output figures (in MW or MWe) are not widely published in recent sources, but the CMSR is designed to be significantly smaller than traditional reactors, enabling modular and scalable deployment. Efficiency details are also limited, though molten salt reactors generally aim for higher thermal efficiency due to their high operating temperatures. - **Fuel Type or Energy Source**: The CMSR utilizes thorium-based fuel dissolved in molten fluoride salts, which also act as the coolant. This allows for a liquid fuel system rather than solid fuel rods used in conventional reactors. - **Key Differentiators**: The CMSR is promoted as inherently safe due to its passive safety features, such as a negative temperature coefficient that reduces reactivity if temperatures rise. It is also marketed as better for the environment, producing less long-lived radioactive waste compared to traditional uranium-based reactors. Its compact size and floating design (for deployment on barges) offer flexibility for remote or coastal locations. - **Development Stage**: The CMSR is in the design and pre-commercial phase. Saltfoss Energy is focusing on feasibility studies and partnerships for deployment rather than operational units as of 2025. - **Target Customers**: Utilities, industrial sectors, and governments in regions seeking clean baseload power, particularly in Asia and Europe. The floating reactor concept also targets countries with limited land availability or high coastal energy demand. Information on additional products or variants is limited, as the CMSR remains the flagship technology under development [Saltfoss Energy](https://saltfoss.com), [The Engineer](https://www.theengineer.co.uk/content/news/seaborg-technologies-secure-funding-for-thorium-based-molten-salt-reactors). ### Regulatory and Licensing Status Saltfoss Energy’s regulatory status is not extensively detailed in public sources as of 2025, particularly regarding specific applications with the U.S. Nuclear Regulatory Commission (NRC) or equivalent bodies in Denmark or other regions. Since the company is based in Denmark, its primary regulatory interactions are likely with European authorities or national bodies in target deployment countries like Thailand. The CMSR, being a novel design, would require extensive safety and design certification processes before commercial deployment, which typically span several years. No specific milestones or timelines for regulatory approval are confirmed in the latest data, though the company’s focus on feasibility studies (e.g., with Thailand’s GPSC) suggests that regulatory engagement is in early stages. Estimated timelines for first commercial deployment are speculative but likely post-2030, given the complexity of licensing advanced nuclear technologies. Updates on regulatory progress are expected as partnerships mature [World Nuclear News](https://www.world-nuclear-news.org/articles/denmarks-seaborg-changes-name-and-adds-to-board), [NucNet](https://www.nucnet.org/news/denmark-s-seaborg-to-explore-deployment-in-thailand-5-3-2024). ### Team and Leadership Detailed information on the current leadership team of Saltfoss Energy is limited in public sources post-rebranding. Historical data indicates the founding team comprised experts in physics and engineering, though specific names and roles have not been updated in recent news. Notably, the company announced the addition of the former mayor of Aarhus to its board in April 2025, though the individual’s name was not specified in available reports. No verified X handles or LinkedIn profiles for key executives were found in the current data set. Further updates may be available directly from the company’s official channels [World Nuclear News](https://www.world-nuclear-news.org/articles/denmarks-seaborg-changes-name-and-adds-to-board). ### Funding and Financial Position Saltfoss Energy has attracted private funding over the years, though exact figures for total capital raised are not fully disclosed in 2025 data. Historical reports note early pre-seed and seed investments, including backing from notable individuals like David Helgason, founder of Unity, as reported in 2018. No specific updates on recent funding rounds (post-2020) were found in the latest sources, suggesting the company may be operating on prior investments or undisclosed rounds. As a private company, market cap and stock performance data are inapplicable. Key investors or strategic backers mentioned in older reports include private individuals and potentially institutional partners, though specifics are outdated. The company remains pre-revenue, focusing on technology development and feasibility studies rather than commercial contracts [NucNet](https://www.nucnet.org/news/denmark-s-seaborg-attracts-investment-for-molten-salt-reactor-project), [Dealroom](https://app.dealroom.co/companies/seaborg_technologies). ### Recent News and Developments | Date | Event | Details | |---------------|-------------------------------|---------------------------------------------------------------------------------------------------| | Apr 3, 2025 | Name Change and Board Update | Seaborg Technologies rebrands to Saltfoss Energy, reflecting molten salt focus; adds former Aarhus mayor to board. | | Apr 1, 2025 | Website Update | Saltfoss Energy launches updated website, emphasizing a new nuclear power plant concept. | | May 3, 2024 | Thailand Deployment Study | Partnership with GPSC in Thailand to explore floating molten salt reactor deployment for net-zero goals. | | Unknown, 2023 | Samsung Partnership | Collaboration with Samsung to develop floating molten salt reactors, leveraging Korean shipbuilding expertise. | | Unknown, 2020 | Private Funding Round | Secured private funding for molten salt reactor project, though specific details are limited. | Note: Due to limited updates in 2025, some events are from prior years or lack precise dates. This table reflects the most relevant developments available [World Nuclear News](https://www.world-nuclear-news.org/articles/denmarks-seaborg-changes-name-and-adds-to-board), [NucNet](https://www.nucnet.org/news/denmark-s-seaborg-to-explore-deployment-in-thailand-5-3-2024). ### Partnerships and Collaborations - **Samsung (South Korea)**: Collaboration to develop floating molten salt reactors, leveraging Samsung’s shipbuilding expertise for barge-mounted nuclear plants. This partnership enhances deployment flexibility for coastal regions, as noted in posts on X. - **GPSC (Thailand)**: Feasibility study for deploying CMSR technology in Thailand, aimed at supporting the country’s net-zero transition. This strategic partnership targets Asian markets with high energy demand and limited land availability [NucNet](https://www.nucnet.org/news/denmark-s-seaborg-to-explore-deployment-in-thailand-5-3-2024). ### New Hampshire Relevance Saltfoss Energy’s CMSR technology could theoretically align with [[New Hampshire]]’s energy needs, particularly given the state’s existing nuclear infrastructure at [[Seabrook Station]] and connection to the ISO-NE grid. The compact and modular nature of the CMSR makes it a potential fit for providing baseload power or supporting data center growth in the Northeast US, where energy demand is rising. Additionally, the technology’s focus on safety and reduced waste could resonate with NH’s legislative initiatives like HB 710, which explores advanced nuclear options and SMR provisions for clean energy. However, the CMSR’s current development stage (pre-commercial, likely post-2030 deployment) does not match NH’s near-term deployment timelines. The floating reactor design may also be less relevant for NH, given limited coastal industrial applications compared to land-based needs. There are no known direct connections or expressed interest from Saltfoss Energy in NH or the Northeast US, with the company’s focus currently on European and Asian markets. Potential applications could include grid power or industrial heat if regulatory and commercial hurdles are overcome in the future. ### Competitive Position Saltfoss Energy competes with other advanced nuclear developers focusing on molten salt or small modular reactor (SMR) technologies. Compared to **[[TerraPower]]** (backed by Bill Gates, developing sodium-cooled reactors in the US), Saltfoss’s thorium-based molten salt approach offers a unique safety profile but lags in regulatory progress and funding scale. Against **[[NuScale Power]]** (focused on light-water SMRs with NRC approval for design certification), Saltfoss’s technology is less mature and faces longer timelines to market. A third competitor, **ThorCon**, also pursues molten salt reactors with a shipyard-based construction model, posing direct competition to Saltfoss’s floating reactor concept. Saltfoss’s advantage lies in its environmental claims (less waste) and flexibility of deployment, but risks include regulatory delays and unproven commercial viability at scale. ### Closing Note Saltfoss Energy, formerly Seaborg Technologies, is at an early but promising stage of developing innovative molten salt reactor technology, with a trajectory focused on international partnerships and a long-term outlook for commercial deployment. *Report generated December 24, 2025*