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Tuesday, October 27, 2026
Zap Energy — Technical Profile & Analysis
Deep-dive assessment of the Sheared-Flow Z-Pinch architecture, fuel path, and market positioning.
Technology Assessment & Commercial Milestones
Latest coverage — Zap Energy
- milestonesOct 18, 2026Zap Energy
Everett company’s devices for fusion power plants gain DoE approval
Zap Energy, a leader in developing fission and fusion-based, carbon-free power, just secured federal approval for a new type […] ...
- IndustrySep 15, 2026Zap Energy
Zap Energy becomes the first fusion company to add traditional nuclear fission to its business — a move that stunned the industry
Zap Energy, a developer of sheared-flow-stabilized Z-pinch fusion, has announced a strategic diversification into traditional nuclear fission, becoming the first private fusion company to formally expand into the established nuclear sector.
- IndustryAug 25, 2026Zap Energy
Zap Energy adds fission reactors to fusion business plan
Z-pinch developer Zap Energy is diversifying its portfolio to include the commercialization of modular fission reactors based on Toshiba’s 4S design, signaling a strategic shift to generate near-term revenue.
- MilestoneAug 22, 2026Zap Energy
Zap Energy shows off its new fusion power prototype, Century
Zap Energy has unveiled its fourth-generation sheared-flow-stabilized Z-pinch device, Century, designed to demonstrate Q=1 energy breakeven without the use of magnetic field coils.
- IndustryJul 30, 2026Fusion sector
Zap Energy becomes the first fusion startup to add fission reactors to its business plan
Zap Energy has announced a strategic diversification into the nuclear fission sector, aiming to generate revenue by selling fission reactors to fund its long-term fusion development.
- ScienceJul 27, 2026Bloomberg
Nuclear Fusion
Zap Energy reports progress on its sheared-flow-stabilized Z-pinch device, achieving plasma currents of 500 kA and producing up to 100,000 neutrons per pulse in its pursuit of a magnet-free fusion architecture.
- MilestoneJul 12, 2026Zap Energy
An American machine fires 500,000 amps down a column of gas twelve times a minute, twenty times the current of a lightning bolt, into a chamber the size of a water heater, and the fusion company that built it is now selling a fission reactor based on a Japanes
Zap Energy reports sustained operation of its FuZE-Q prototype, achieving 500 kA plasma currents at a repetition rate of 0.2 Hz, marking progress in sheared-flow-stabilized Z-pinch development.
- IndustryJun 29, 2026Zap Energy
Fusion power startup Zap Energy pulls a partial pivot, adding nuclear fission to the mix
Z-pinch developer Zap Energy is diversifying its portfolio by developing a mobile micro-fission reactor to generate near-term revenue while continuing its long-term fusion research.
Magneto-Inertial, Pulsed & Alternative Cores
Pulsed compression schemes that explicitly avoid massive static superconducting magnets, prioritising upfront-capex reductions and modular replicability.
Reactor design
Magneto-Inertial / Sheared-Flow Z-Pinch
Core tech focus
Sheared axial flow for kink stabilization
Key milestones
FuZE-3 achieved 1.6 GPa total pressure (late 2025). Net gain targeted late 2020s.
Magnet-free sheared-flow Z-pinch. Has demonstrated > 1.6 GPa total plasma pressure — the most direct evidence that an ultra-low-capex magnet-free architecture is viable.
FRC, MTF, sheared-flow Z-pinch and levitated dipole topologies. Helion's magneto-inertial FRC bypasses the thermal steam cycle entirely — plasma magnetic energy directly induces electricity in surrounding coils on expansion. TAE's continuous beam-driven FRC targets p-¹¹B, demanding triple products on the order of 10²⁴–10²⁵ keV·s·m⁻³.
- Pulsed-rep-rate engineering: sustaining 1–10 Hz operation with millisecond-scale energy recovery.
- For aneutronic FRC (TAE), bremsstrahlung scales as Pbrems ∝ Tₑ^½, capping Pfus/Pbrems at ~0.2–0.3 without non-thermal ion distributions.
- For MTF (General Fusion), liquid-metal vortex stability under pneumatic shock and synchronisation of dozens of pistons.
- For sheared-flow Z-pinch (Zap), maintaining kink-stability at commercial pulse repetition rates.
- Elimination of large superconducting magnet assemblies removes the single largest capex line in tokamaks.
- Direct-conversion architectures bypass the 35–40% Rankine/Brayton thermodynamic ceiling, pushing net plant efficiency past 60–70%.
- Liquid-metal first-walls (General Fusion) eliminate first-wall replacement cycles entirely.
Helion holds the industry's singular commercial benchmark — a binding Microsoft 50 MW PPA for 2028. D-³He fuel and direct induction allow compact, high-rep-rate modules suited to hyperscaler data-centre siting. General Fusion offers radical mechanical simplicity by replacing lasers and brittle superconductors with pistons, solving the neutron-wall problem via a rotating liquid-lithium barrier. Zap has demonstrated 1.6 GPa plasma pressure, suggesting magnet-free architectures may be the lowest-capex route.
Sourced from the 2026 Global Fusion Energy Comparison — triple-product physics, DEC architecture, and LCOE framework.
Who built Zap Energy
Zap Energy is the commercial materialization of a breakthrough discovery made inside the research labs of the University of Washington. Nuclear engineering professors Dr. Uri Shumlak and Dr. Brian Nelson successfully proved that a dynamic, sheared-flow current could stabilize a Z-pinch plasma column, preventing it from collapsing without the need for massive, costly external magnets. Recognizing the massive economic advantage of a reactor that replaces magnetic coils with raw electrical currents, they teamed up with tech executive Benj Conway in 2019. Together, they have built an agile company dedicated to making the lowest-cost, most compact fusion reactor on the market.
Benj Conway
MBA, University of Oxford; BA, Williams College
Brian A. Nelson
PhD in Nuclear Engineering, MIT; Professor Emeritus, University of Washington
Uri Shumlak
PhD in Nuclear Engineering, UC Berkeley; Professor, University of Washington
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