DOE-fusieroadmap: Pad naar commerciële fusiekracht

Since de uitvinding van de Tokamak-reactor door Sovjetwetenschappers in 1958, humanity has technically been able to produce nuclear fusion on Earth, merging lighter atoms into heavier ones in a very energetic reaction.

In theory, this technology could provide humankind with unlimited clean energy, with no carbon emissions, no nuclear waste, and an unlimited supply of fuel as it consumes hydrogen, the most abundant element in the Universe, and turns it into harmless helium.

This atomic reaction is >10x more energetic than even the most powerful nuclear fission reactions.

Bron: Nature

However, the practical use of fusion has been elusive ever since, as trigger fusion is a complex process that so far requires more energy than is generated by the nuclear reaction.

(U leert meer over de basisprincipes van kernfusie in ons speciale rapport “Nuclear Fusion – The Ultimate Clean Energy Solution on the Horizon.”).

Still, the potential of nuclear fusion technology has been evolving quickly in the past few years, and many private companies are now claiming to be close to a commercially viable reactor, notably Proxima Fusion, Commonwealth Fusion Systems, and the soon-to-be publicly listed General Fusion (GFUZ )  (volg de links voor meer informatie over elk bedrijf en hun voortgang).

It is in that context of intensifying competition for becoming the first nuclear fusion company with a viable product that the US Department of Energy (DoE) has published a new national report on nuclear fusion outlining how the country could accelerate innovation in the sector, improve technical standards, and ameliorate the transfer of knowledge from academia to the private sector.

The report also emphasizes the importance of improving the technology for “diagnostic” instruments that analyze the quality and stability of the plasma generated by nuclear fusion.

Waarom kernfusie belangrijk is voor wereldenergie

Tot nu toe is de mensheid nog steeds op zoek naar de ideale energiebron. Fossiele brandstoffen vervuilen, veroorzaken klimaat‑schadelijke koolstofemissies, en kunnen op een dag opraken.

Maar de alternatieven voor kernsplijtingsenergie produceren afval en zijn complex, terwijl hernieuwbare energie veel land vereist, intermitterend is, en enorme energieopslag nodig heeft om te functioneren naarmate ze een groter deel van de energiemix uitmaken.

Kernfusie zou in theorie zowel een ultracompacte energiebron kunnen zijn zonder vervuiling en met onbeperkte energie.

Echter, tot nu toe wordt de technologie beperkt door de complexiteit van het starten en vervolgens behouden van de energieproducerende plasma die nodig is voor fusie. Aangezien dit plasma tot 10x heter is dan de kern van de Zon, vereist dit extreem complexe en ultrakrachtige magnetische velden die worden gegenereerd door magneten gekoeld tot temperaturen dicht bij het absolute nulpunt.

Bron: DOE

Alleen minuten- of urenlang stabiel plasma zal voldoende waterstof fuseren om de initiële energiekosten van het creëren van de juiste omstandigheden te compenseren, evenals het energieverbruik voor het koelen en actief houden van de supergeleidende magneten.

En alleen met een enorme positieve energieopbrengst kan zo’n reactor commercieel levensvatbaar zijn om de grote investering in de bouw en exploitatie van de nuclear fusion reactor terug te verdienen.

DoE 2026-rapport over kernfusie

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Achtergrond van het DoE-fusierapport

This new report by the DoE was the result of a large collaboration of experts on nuclear fusion, sponsored by the DOE’s Office of Science’s Fusion Energy Sciences (FES) program.

It was chaired by Luis Delgado-Aparicio, head of advanced projects at the DOE’s Princeton Plasma Physics Laboratory (PPPL), and co-chaired by Sean Regan, a distinguished scientist and the director of the Experimental Division at the University of Rochester’s Laboratory for Laser Energetics.

The report’s main goal is to provide academic and state support to coordinate and optimize the > $9B of investment made by the private sector on this technology.

It covers all seven identified major research areas in the field of nuclear fusion, which are all theoretical topics, as well as all the main designs of potentially commercially viable nuclear fusion reactors:

• Lage temperatuur plasma.
• Hoge‑energiedichtheid plasma.
• Plasma‑materiaalinteractie.
• Magnetische opsluitingsfusie — brandend plasma.
• Inertiële opsluitingsfusie — brandende plasma’s.
• Magnetische fusie‑energie — fusie‑pilotplant.
• Inertiële fusie‑energie — fusie‑pilotplant.

Belangrijkste bevindingen uit de DOE-fusieroadmap

The first finding of the report is that for commercial nuclear fusion to be achieved, 8 distinct infrastructure streams are critical for progress, including plasma science, AI, and testing of reactor components like blankets (providing a continuous fuel stream), fuel cycle, and magnets.

Bron: DOE

It also proposes a few initiatives to speed up the pace of progress of research and development of nuclear fusion for energy generation.

The first one is to encourage the use of validation and verification of models by AI and machine learning, as well as the use of digital twins.

It also insists that the most important missing link toward commercial fusion is improvement in the measurement of plasma, a discipline described as plasma “measurement” or “diagnostic”.

The report identifies four topics where public-private partnerships (PPP), national teams, and multi-lab coordination can anchor national investment in fusion research:

• Stralingsgeharde diagnostiek & bijbehorende sensoren.
• AI, machine learning en realtime data‑analyse.
• Tritiumproductie en warmte‑belastingbeheer.

Bron: DOE

Lastly, it is recommended to provide seed funding for a more reliable and diverse supply chain for fusion equipment. This is because fusion power plants will require robust, radiation-tolerant internal components that can be manufactured at scale way beyond the current one-of-a-kind lab experiments.

“De productie van componenten op basis van hoog‑temperatuur refractaire metalen zal een combinatie vereisen van robuuste geavanceerde productiemethoden (bijv. laserbed‑3D‑printen) en testen met een combinatie van infrastructuur (bijv. kleine teststanden, middelgrote demonstratieplatformen en grootschalige faciliteiten).”

Focus op plasma‑diagnostiek

Diagnostiek is de belangrijkste ontbrekende schakel voor commerciële fusie, omdat het bepaalt hoe de plasma in realtime kan worden geanalyseerd en aangepast, zodat deze gestabiliseerd en productiever kan worden gemaakt.

To make plasma diagnostic progress quicker, the report proposes a much greater level of national coordination, relying on forming national teams, a national network potentially to be called Calibration NetUS.

It also encourages the establishment of a standardized approach to diagnostic calibration that can help compare different designs and prototypes.

On the human and management side, the report pushes for investing in workforce development, help for measurement innovation to be performed remotely, and improving knowledge transfer to the private sector.

The report also looks at alternative paths to fusion that are promising, but have been less explored so far, despite potentially being more efficient, reliable, or cheaper than previously established paths to fusion. This covers:

• Stellarators(similar to tokamaks but with much more complex magnetic field generators)
• Liquid-metal PFCs(“Plasma-Facing Components”, by opposition to conventional solid PCFs)
• HTS magnets in a magnetic mirror configuration
• Shearedflow-stabilized Z-pinch fusion.

Kritieke technologische hiaten die de ontwikkeling van fusie vertragen

The report also points to the missing technical elements that could make fusion energy generation a reality sooner, with many maybe less complex than the production of the fusion itself, but likely to impact a future commercial plant’s costs, and therefore the competitiveness of fusion technology against renewables and already existing nuclear fission.

One is the lack of validated data on damage caused by neutrons emitted by the fusion process on adjacent materials, with potential embrittlement, creep-fatigue, swelling, etc. As commercial plants will need to operate efficiently and safely for decades, a deeper understanding of such damages will be important. This could affect many components of a fusion reactor, like welds, structural walls, coolant, etc.

Manufacturing practice will also need to be tested and optimized. The production of “nuclear grade” heat will require especially reliable and consistent welds, joints, and other structural elements.

Coolant compatibility, supply chain for the tritium-generating blanket, insulation from electrical and magnetohydrodynamics (MHD) effects, and tolerance to magnetic fields will all need to be evaluated as well.

Het juiste beleid

While the report is mostly addressing technical considerations, regulations are also discussed so that the right policy framework can support the technical & research efforts.

Nuclear fusion relies on hydrogen, lithium, boron, and other common elements that are not fissile or usable for the production of nuclear weapons. Even the in-situ production of tritium in the fusion reactors, a radioactive isotope of hydrogen, would not be a serious proliferation risk.

So the report insists on keeping fusion energy out of the context of nuclear fission frameworks for regulatory and non-proliferation policy, in order not to hinder research and investment in the field with unwarranted roadblocks designed for more dangerous materials like uranium or plutonium.

Design rules and a list of materials acceptable in a commercial fusion power plant will also need to be established and commonly accepted, while staying flexible enough to evolve as the industry’s best practices improve or new technologies are adopted.

While not consuming radioactive material, fusion plants do emit neutrons, which can slightly radioactive the surrounding materials, especially any parts directly inside the reactor. So, regulations regarding the safe disposal and storage of these materials will also be required.

Investeren in kernfusie

General Fusion / Spring Valley Acquisition Corp. III

General Fusion is one of the startups leading the charge in making fusion a private sector venture, instead of a publicly-funded physics project.

The company was started as long ago as 2002, with a goal to develop Magnetized Target Fusion (MTF) technology. MTF is expected by the company to be a shorter path to energy-positive fusion and to be a lot less costly.

General Fusion was the first in the world to build and commission a compact toroid plasma injector at a power plant scale in 2010 and has reached many more milestones since.

This approach differs from tokamak-style systems and laser-based inertial confinement because it is designed around rapid pulse compression rather than relying solely on large superconducting magnets or high-powered lasers.

The company has raised roughly $440M since its launch, and Fusion announced in januari 2026 that it would soon become publicly listed through a deal with the SPAC Spring Valley Acquisition Corp. III, valuing General Fusion at a $1B market capitalization. They declared that the new corporate entity would be called General Fusion and would be listed on the Nasdaq under the GFUZ ticker.

The soon-to-be-joined companies are aiming to make MTF fusion technology commercially available around the mid-2030s.

Laatste nieuws en prestaties van Spring Valley Acquisition Corp. III (SVAC)