Fusion-related export controls

Overview

Fusion-related export controls are a framework of laws and multilateral agreements designed to manage the international transfer of sensitive fusion energy technologies. The primary rationale for these controls is non-proliferation. Certain materials, components, and technologies essential for fusion research have dual-use applications, meaning they can also be used in the development or production of nuclear weapons. Key examples include tritium, a primary fusion fuel that is also a critical component in modern thermonuclear weapons, and high-flux neutron sources, which can be used for materials testing for both fusion reactors and weapons programs. As the private fusion industry has grown, the scope of export controls has expanded to include considerations of national economic security and technological leadership, aiming to prevent strategic rivals from acquiring proprietary advancements.

These regulations create a complex compliance landscape for fusion developers, research institutions, and their supply chains. Navigating these rules is critical for international collaborations like ITER, for companies sourcing components globally, and for academic institutions with international staff and students. The controls impact everything from the shipment of a superconducting magnet to the sharing of simulation software or technical data with a foreign national.

Physics and Regulatory Mechanisms

The mechanisms of fusion export controls are legal and administrative rather than physical. They are implemented through multilateral export control regimes and national legislation. The core principle is the classification of items (commodities, software, and technology) based on their technical specifications and potential for misuse.

Two principal international regimes are relevant:

Nuclear Suppliers Group (NSG): An organization of nuclear supplier countries that seeks to prevent nuclear proliferation by controlling the export of materials, equipment, and technology that could be used to manufacture nuclear weapons. The NSG maintains a "Dual-Use List" (INFCIRC/254/Part 2) that includes items relevant to fusion, such as tritium, tritium recovery and production facilities, and lithium isotope separation facilities.
Wassenaar Arrangement: This regime focuses on controlling the export of conventional arms and dual-use goods and technologies. Its lists cover a wide range of items applicable to fusion, including high-temperature superconducting (HTS) materials, advanced computation systems, and precision manufacturing equipment.

At the national level, countries implement these multilateral agreements through their own laws. In the United States, the primary regulations are:

Export Administration Regulations (EAR): Administered by the Department of Commerce's Bureau of Industry and Security (BIS), the EAR controls the export of most commercial and dual-use items. Items are classified under an Export Control Classification Number (ECCN) on the Commerce Control List (CCL). Many fusion-related components fall under the EAR.
International Traffic in Arms Regulations (ITAR): Administered by the Department of State's Directorate of Defense Trade Controls (DDTC), ITAR governs defense articles and services. While most fusion technology is not considered a defense article, any technology specifically designed or modified for a military purpose would fall under ITAR.
10 CFR Part 810: Administered by the Department of Energy (DOE), this regulation specifically controls the export of unclassified nuclear technology and assistance, requiring authorization for transferring sensitive nuclear-related information to foreign nationals.

The classification of a fusion technology under these regimes determines the licensing requirements for its export to specific countries or end-users. For example, exporting a high-field HTS magnet might require a license from the BIS, depending on its magnetic field strength, materials, and destination.

Historical Development

The history of fusion export controls is rooted in the broader Cold War-era nuclear non-proliferation effort. The initial focus was almost exclusively on state-run nuclear weapons programs.

1940s-1950s: The U.S. Atomic Energy Act of 1946 and 1954 established a strict government monopoly over nuclear information and technology, effectively prohibiting private or international work on fusion. The "Atoms for Peace" initiative in 1953 began a slow process of declassification and international cooperation in peaceful nuclear uses, including fusion.
1970s: The formation of the Nuclear Suppliers Group in 1975, in response to India's 1974 nuclear test which used civilian nuclear technology, created the first major multilateral framework for controlling dual-use nuclear items. Early NSG lists included tritium and lithium-6, directly impacting fusion research.
1980s-1990s: The end of the Cold War saw an increase in international scientific collaboration, exemplified by the formal agreement to construct the International Thermonuclear Experimental Reactor (ITER) in 1988. This required careful navigation of existing export control laws to allow for the transfer of technology and know-how among partner nations. The Wassenaar Arrangement was established in 1996 to succeed the Cold War-era COCOM regime, modernizing controls on a wider range of dual-use technologies.
2010s-Present: The rise of a well-funded private fusion industry created a new paradigm. Previously, fusion technology was primarily developed within government labs, making control straightforward. The proliferation of startups in the U.S., UK, and elsewhere introduced concerns about protecting national investment, intellectual property, and preventing the transfer of cutting-edge technology to strategic competitors. This led to a re-evaluation of existing regulations. In 2022, the U.S. Department of Commerce added four emerging technologies to the CCL, including software for designing certain advanced gate-all-around field-effect transistors, signaling a proactive approach to controlling technologies with both commercial and military significance that could be relevant to fusion's advanced computational needs.

Current Status (as of 2026)

The export control landscape for fusion energy is in a state of significant flux, driven by the rapid maturation of the commercial fusion sector. Governments, particularly in the United States, are actively working to balance two competing goals: fostering a vibrant, innovative domestic fusion industry and preventing the proliferation of sensitive technologies.

In 2022, the White House announced a "Decadal Vision for Commercial Fusion Energy," which highlighted the need for a regulatory framework that encourages growth while ensuring safety and security. Following this, the U.S. Nuclear Regulatory Commission (NRC) voted in 2023 to regulate fusion energy systems under a framework separate from nuclear fission plants, using its Part 30 process for byproduct materials. While this decision primarily affects domestic licensing, it signals a tailored regulatory approach that will likely influence export control policy.

The Bureau of Industry and Security (BIS) is actively reviewing whether specific fusion-related technologies should be added to the Commerce Control List as emerging and foundational technologies under the Export Control Reform Act of 2018 (ECRA). As of 2026, there is no single ECCN category for a complete fusion device. Instead, a fusion system is treated as a collection of its constituent parts, each subject to its own classification. For instance, high-temperature superconducting wire, vacuum pumps, and specialized power supplies are all controlled under different ECCNs. This "sum of the parts" approach creates significant compliance burdens for fusion companies.

Notable Implementations

Export control compliance is a critical operational function for nearly every entity in the fusion ecosystem.

ITER Organization: As a collaboration among 35 nations, ITER operates under a complex legal framework that allows for the in-kind contribution of components and technology from its members. The ITER Agreement includes provisions that require members to facilitate the necessary administrative approvals, including export licenses, for transfers of equipment and personnel to the project site in France.
Commonwealth Fusion Systems (CFS): As a leading private fusion company in the U.S., CFS must manage a global supply chain for its SPARC and ARC tokamak projects. The company's use of proprietary high-temperature superconducting (HTS) magnets, a key enabling technology, makes export compliance paramount. Transferring the magnets themselves, the manufacturing know-how, or even detailed technical data to foreign partners or customers would require U.S. government authorization.
National Laboratories (e.g., Princeton Plasma Physics Laboratory, Lawrence Livermore National Laboratory): These U.S. Department of Energy labs have decades of experience managing controlled nuclear information. They have robust Technology Control Plans (TCPs) and designated export compliance officers to manage international collaborations, foreign national visitors, and the publication of research with potential sensitivities.
Fusion Industry Association (FIA): This industry body advocates for its members on regulatory issues. The FIA has actively engaged with the Department of Commerce and other agencies to recommend a clear and predictable export control framework that does not stifle innovation or prevent U.S. companies from competing in a future global fusion energy market.

Open Challenges

The primary challenge is adapting Cold War-era non-proliferation regimes to the 21st-century reality of a competitive, privately-funded fusion industry. Several specific problems persist:

Regulatory Uncertainty: The lack of a clear, fusion-specific regulatory framework in the U.S. and other countries creates uncertainty for investors and companies. The current "sum of the parts" approach is inefficient and can lead to inconsistent rulings. Industry advocates are calling for a tailored framework that recognizes fusion's low proliferation risk compared to fission.
Deemed Exports: The transfer of controlled technology or source code to a foreign national within a country is considered a "deemed export" to that person's home country. This poses a significant challenge for fusion companies and universities that rely on a global talent pool of scientists and engineers. A researcher's access to certain design files or diagnostic software could require an export license.
Intangible Technology Transfer: Controls apply not just to physical hardware but also to "technology"—the specific information necessary for the development, production, or use of a controlled item. In the age of cloud computing and remote collaboration, tracking and controlling the transfer of sensitive design data, simulation models, and expertise is a major compliance hurdle.
International Harmonization: While multilateral regimes exist, national implementation can vary. A component that is easily exported from one country may be tightly controlled in another, complicating international supply chains and collaborations. As China and other nations advance their own fusion programs, the potential for divergent control lists and policies increases.

Outlook

The 5-15 year outlook for fusion export controls will be defined by the tension between promoting commercialization and managing security risks. It is highly probable that the United States and other leading fusion nations will establish more explicit, fusion-specific export control categories within the next five years. This will likely involve adding new ECCNs to the Commerce Control List for specific fusion components (e.g., advanced magnets, plasma heating systems) and potentially for integrated fusion reactor designs.

The goal of this regulatory evolution will be to provide clarity for the industry while focusing restrictions on the most sensitive "chokepoint" technologies. A risk-based approach is expected, where technologies with clear dual-use applications (e.g., efficient tritium breeding systems) will face the strictest controls, while more common components will have lower barriers to export. The U.S. government's approach will likely aim to establish a de facto international standard, encouraging allies to adopt similar controls to create a level playing field and a unified non-proliferation front.

Over the 15-year horizon, as fusion devices approach commercial deployment and a global market emerges, export controls will become a key instrument of industrial policy. Nations with mature fusion technologies will use licensing requirements to favor domestic industries, encourage technology co-development with strategic allies, and restrict access for geopolitical rivals. The effectiveness of these controls will depend on the ability of regulatory agencies to keep pace with rapid technological innovation and the willingness of nations to cooperate on enforcement.

References

Fusion Energy Regulation: A Global Challenge for a Global Good — Bulletin of the Atomic Scientists (2023)
Commerce Adds Four Technologies to the Export Control List — U.S. Department of Commerce, Bureau of Industry and Security (2022)
A Proliferation Assessment of the SPARC Fusion Device — Princeton Plasma Physics Laboratory (2021)
Fusion Energy: A new approach to regulation is needed to unlock its potential — Fusion Industry Association (2022)
INFCIRC/254/Rev.14/Part 2: Communications Received from Certain Member States Regarding Guidelines for Transfers of Nuclear-related Dual-use Equipment, Materials, Software and Related Technology — International Atomic Energy Agency (IAEA) (2019)
NRC Staff Recommends Regulation of Fusion Energy Systems with a Process Similar to Particle Accelerators — U.S. Nuclear Regulatory Commission (2022)
Export Controls and the U.S. Innovation System — Center for a New American Security (CNAS) (2023)
White House Summit on Developing a Bold Decadal Vision for Commercial Fusion Energy — The White House (2022)