Z-Pinch Fusion Power Plant by Zap Energy: status and timeline

Z-Pinch Fusion Power Plant

A compact fusion power plant using sheared-flow-stabilized Z-pinch plasma confinement. The plant requires no complex external magnets or laser systems, reducing capital costs and operational complexity.

ProtoStage 2 of 5

Preconceptual design approved by DOE in May 2026; 50 MW pilot plant in design phase.

Updated Aug 2026Checked 10 Oct0 updates this week

Milestones

Next · Pilot plant construction start

Series A funding2018Complete.
Series B and C funding2023Complete.
Series D funding closeSep 2024Complete.
DOE approves preconceptual designMay 2026Complete.
Bismuth loop passes 1,000 hours operationAug 2026Complete.
Pilot plant construction startTarget 2028Not yet reached.

Most important updates

Upcoming

2027Pilot plant site selection (next)
2028Pilot plant construction start

Current obstacles

Plasma confinement durationCurrent Z-pinch plasmas last milliseconds to seconds. Reaching minutes or longer for continuous power requires advances in stability and plasma physics.
Liquid metal corrosion and material compatibilityBismuth and lead at high temperatures corrode structural materials. Long-term exposure and tritium breeding cycles must be validated.
Neutron shielding and plant layoutCompact Z-pinch plants need efficient shielding in a small footprint. Design optimization to reduce shielding mass while meeting safety requirements.

Physics limits

Current and voltage limits of power suppliesElectrical systems that deliver gigawatt-scale current pulses are technically feasible but represent a capital cost driver. Advances in pulsed power technology improve economics.
Neutron activation of structural materialsEven advanced materials become radioactive under high neutron flux. Maintenance and decommissioning costs depend on material choice and neutron environment.
Tritium breeding efficiencyFusion reactions produce one tritium per reaction, but some is always lost. Net tritium breeding requires a blanket that produces more fuel than the plasma consumes.

How it works

3 parts

Plasma generation

Current-driven Z-pinch

Large electrical current flows through plasma, generating a magnetic field that confines and heats it. No external magnets needed.

Heat extraction

Liquid metal cooling

Bismuth or lead circulates around the plasma, absorbing heat and breeding tritium. Same coolant serves multiple modules.

Power conversion

Thermal cycle to grid

Heat drives a steam or supercritical CO2 turbine to generate electricity. Modular design scales from 50 MW up.

Spec sheet

Spec	Z-Pinch Fusion Power Plant
Pilot plant capacity	50 MW electrical^R (reported)
Total funding raised	$327M^R (reported)
Liquid bismuth loop test duration	1,000+ hours^R (reported)

^R reported by the company

Update log

2 updates

Aug 2026

Major: Zap Energy's liquid bismuth loop achieves 1,000 hours of continuous operationPressHardware

May 2026

Major: U.S. Department of Energy approves Zap Energy's 50 MW fusion pilot plant preconceptual designPressRegulatory

About Zap Energy

The team behind Z-Pinch Fusion Power Plant

Zap Energy

Z-pinch fusion, fission-fusion hybrid, compact power

Founded in 2017, Zap Energy develops Z-pinch fusion, fission-fusion hybrid, and modular fission reactors. Its sheared-flow Z-pinch uses liquid metal cooling without external magnets or lasers.

Raised $327M through Series D (September 2024) led by Soros Fund Management, Chevron, Shell, and Gates-linked investors.
DOE approved preconceptual design for 50 MW pilot plant in May 2026.
Liquid bismuth loop passed 1,000 hours of continuous operation in August 2026.

zapenergy.com (opens zapenergy.com)Company profile →

Founded: 20179 yrs
Headquarters: United States
Status: Private
Valuation: $1.1Bdeal valueSep 2024
Raised: $324M4 rounds
Last round: Series D · $130MSep 2024
Works in: EnergyFusion
Coverage: 3 programs · 3 updateslatest 1 Aug 2026checked 10 Oct
Lead investors: Soros Fund Management

Spec

Z-Pinch Fusion Power Plant

Pilot plant capacity

50 MW electrical^R (reported)

Total funding raised

$327M^R (reported)

Liquid bismuth loop test duration

1,000+ hours^R (reported)