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| Fusion power | |
|---|---|
| Name | Fusion power |
| Status | Research and development |
| First concept | 1920s |
| Notable projects | ITER, JET, NIF, Wendelstein 7-X, EAST, KSTAR, TFTR, SPARC |
Fusion power.
Fusion power is the generation of usable energy by fusing light atomic nuclei into heavier nuclei, releasing binding energy. The field intersects experimental programs, national laboratories, private companies, and multinational collaborations aiming to produce sustained net energy from reactions studied in stellar physics, plasma physics, and nuclear engineering.
Magnetic confinement devices such as tokamaks and stellarators (exemplified by ITER, JET, Wendelstein 7-X) and inertial confinement devices like laser facilities (NIF, LMJ) are principal approaches pursued by institutions including Culham Centre for Fusion Energy, Princeton Plasma Physics Laboratory, and commercial entities like Commonwealth Fusion Systems and TAE Technologies. Key milestones are chronicled across projects such as TFTR, JET, SPARC and programs in countries represented by United States Department of Energy, Euratom, ITER Organization, Japanese Atomic Energy Agency, China National Nuclear Corporation, Korea Institute of Fusion Energy and Rosatom. International treaties and cooperative frameworks, including arrangements at Cadarache and agreements with the European Commission, shape large-scale facilities.
Foundations trace to early 20th-century work by physicists whose results guided later programs: Arthur Eddington, Hans Bethe, Enrico Fermi, and theorists at Cavendish Laboratory. Postwar initiatives at laboratories such as Lawrence Livermore National Laboratory, Los Alamos National Laboratory, Culham Laboratory, and Kurchatov Institute advanced magnetic confinement and inertial confinement concepts. The 1958 Atoms for Peace era influenced civil research trajectories while Cold War programs at Lawrence Berkeley National Laboratory and Princeton Plasma Physics Laboratory propelled tokamak development. High-profile projects—ITER negotiations, the Joint European Torus achievements, and the National Ignition Facility milestone experiments—mark evolving priorities amid private ventures like Helion Energy and philanthropic investments from figures associated with Breakthrough Energy.
Fusion reactions rely on nuclear forces described through work originating with Niels Bohr, Ernest Rutherford, and Hideki Yukawa and apply plasma physics formalism developed by researchers at Max Planck Institute for Plasma Physics and Moscow Institute of Physics and Technology. Confinement criteria reference the Lawson criterion and scaling from experiments at JET and theory from Lev Landau and Lev Artsimovich. Key reactions include deuterium–tritium, deuterium–deuterium, and proton–boron-11 pathways investigated by teams at Princeton University, Massachusetts Institute of Technology, and University of Oxford. Alpha particle heating, bremsstrahlung, cyclotron radiation, and magnetic reconnection are processes studied at facilities such as DIII-D and EAST. Diagnostics developed at Oak Ridge National Laboratory and Sandia National Laboratories—including Thomson scattering, bolometry, and neutron spectrometry—measure plasma parameters and fusion yield.
Tokamaks (e.g., JET, ITER, TFTR, KSTAR) and stellarators (e.g., Wendelstein 7-X, Heliotron variants) dominate magnetic confinement design space, while alternative concepts include spherical tokamaks (MAST Upgrade, SPARC lineage), reversed-field pinches (RFX-mod), and compact toroids pursued by groups at General Fusion and Tri Alpha Energy (TAE Technologies). Inertial confinement approaches at NIF, OMEGA Laser Facility, and Laser Mégajoule use high-power lasers and hohlraums; magnetized target fusion is developed at institutions like Los Alamos National Laboratory and companies such as Helion Energy and General Fusion. Hybrid schemes and advanced fuel cycles inform design choices studied by universities like Imperial College London and EPFL.
First-wall materials, structural alloys, and superconductors are constrained by neutron irradiation studied at ITER Organization test modules, irradiation campaigns at Forschungszentrum Jülich, and materials programs at Oak Ridge National Laboratory and CNEA. High-temperature superconductors developed by firms such as Superpower Inc. and groups at MIT enable compact magnets used by Commonwealth Fusion Systems. Plasma–material interactions, tritium permeation, erosion, and helium embrittlement are active topics at SCK CEN, Idaho National Laboratory, and CEA. Remote maintenance, robotic manipulators, and divertor technologies are advanced at JET and Culham Centre for Fusion Energy to address activation and heat flux challenges.
Primary fuel strategies center on deuterium and tritium: deuterium is abundant in seawater with extraction methods studied at Scripps Institution of Oceanography, while tritium breeding via lithium blankets is developed at ITER, informed by work from AECL and JAEA. Alternative cycles (deuterium–deuterium, proton–boron-11) are researched by teams at University of California, Irvine, University of Tokyo, and Princeton University. Supply chains intersect with heavy water reactors operated by Canadian Nuclear Laboratories and tritium handling protocols derived from US Nuclear Regulatory Commission-guided practice. International procurement and safeguards involve IAEA frameworks and national agencies including Rosatom and China National Nuclear Corporation.
Economic assessments from International Energy Agency analysts and modeling by MIT Energy Initiative compare levelized costs against systems promoted by entities like World Nuclear Association and International Atomic Energy Agency. Safety analyses use regulatory models from US Nuclear Regulatory Commission and lessons from incidents at Three Mile Island and Chernobyl—not as direct analogues but as institutional precedents for licensing. Fusion proponents highlight low long-lived radioactive waste relative to fission as discussed in reports from OECD Nuclear Energy Agency and lifecycle analyses by European Commission research. Proliferation concerns involve treaties and oversight by IAEA and policy bodies within United Nations frameworks.
Contemporary programs combine large-scale cooperation (ITER Organization, Euratom) with private acceleration by Commonwealth Fusion Systems, Helion Energy, Tokamak Energy, and TAE Technologies. Demonstration plants and roadmap milestones—ITER First Plasma, DEMO concepts by Fusion for Energy, and compact pilot plants proposed by US Department of Energy initiatives—are focal points for timelines debated at conferences like IAEA Fusion Energy Conference and EPS-HEPP. Advanced materials testing at facilities such as IFMIF and diagnostics improvements at ITER-partner laboratories aim to reach net electricity and commercial deployment targets advocated by stakeholders including European Commission Horizon programs and national agencies like Japan Atomic Energy Agency and Korea Institute of Fusion Energy.
Category:Energy technology