A star is easy to admire.
Hard to operate.
Everyone talks about the plasma. We build everything around it. Balance of plant is the 80% of a fusion or advanced-fission facility that determines whether a physics milestone becomes a power plant: heat transport, power conversion, fuel cycle, cryogenics, vacuum, electrical, and the supervisory control layer that makes ten thousand devices behave as one machine. Porritt Inc. designs, instruments, and controls that plant.
Primary Coolant Loop
Dual molten-salt loops carry blanket heat to the power island. Intermediate heat exchangers isolate activated coolant from the clean secondary side, with drain tanks and freeze-plug protection on every leg.
Power Conversion
Supercritical CO₂ Brayton cycle converts blanket heat to grid electricity at high efficiency in a compact footprint — printed-circuit heat exchangers, integrally geared turbomachinery, dry-cooling option for arid sites.
Tritium Fuel Cycle
Closed-loop tritium plant: breeding-blanket extraction, isotope separation, cryogenic distillation, and metal-hydride storage beds, with full accountancy at every transfer point and double containment throughout.
Cryoplant
Helium refrigeration delivers 4.5 K cold power to the superconducting magnet set, with 80 K thermal shields and quench-recovery surge volumes. Liquefier sized for full cooldown in under three weeks.
Vacuum Systems
Staged roughing, turbomolecular, and cryosorption pumping hold the torus at ultra-high vacuum and the cryostat at insulating vacuum, with regeneration sequencing that keeps pumping continuous through long burns.
Plant Electrical
Generator step-up, auxiliary distribution, and pulsed-power interfaces for magnet and heating systems — ride-through design keeps the plant stable through grid transients and plasma events alike.
I&C / SCADA — the Helm layer
EPICS-based supervisory control: 50,000+ live tags, machine-protection interlocks with sub-10 ms trip latency, and an operator HUD designed like a flight deck, not a filing cabinet. We interface cleanly with the plasma controller at the balance-of-plant boundary — the machine physics stays with the machine builder; the plant is ours.
Fission first. Fusion ready.
Our plant architecture is heat-source agnostic by design: an initial operating run on fission heat with engineered tie-in taps to retrofit fusion heat sources after testing. The balance of plant — and the control layer that runs it — carries forward unchanged. That is how you de-risk the plasma era: build the plant that outlives its first heat source.
Layton, Utah.
American-built.
Porritt Inc. is an energy-technology company building the software, controls, and hardware layer for complex energy facilities — from refineries to the plasma era. Founded and led by Timothy Porritt. Registered and active on SAM.gov (CAGE 9Z7B9) for federal and national-laboratory teaming.
See the rest of the stack
Software families, neuromorphic R&D, HPC hardware, and balance-of-plant control across process, marine, and defense sensing.
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