The plasma gets the attention; the plant does the work
Roughly eighty percent of a fusion power plant by equipment count, piping, cable and capital is balance of plant: heat transport, power conversion, cryogenics, vacuum, tritium and fuel handling, plant electrical, and the instrumentation and control that ties it together. Those systems are where trips and outages originate, and they must exist and operate before the first fusion heat arrives.
Design for a heat source that is still changing
Confinement concepts, duty cycles and heat-exchanger interfaces will change between pilot plant and commercial unit. A control architecture tied to one machine is rebuilt with it. A plant that cannot run until the machine is ready has no operating history when it is.
Fission first, fusion ready
Porritt Inc. designs the balance of plant as a heat-source-agnostic system: an initial operating run on fission or conventional heat, with engineered tie-in taps for retrofitting fusion heat sources after testing. Machine physics stays with the machine builder; the plant belongs to the plant.
- Heat transport and power conversion sized for the thermal envelope, not one device
- Cryoplant, vacuum and tritium systems designed as plant utilities with their own protection layers
- One tag namespace and one control strategy across the fission run and the fusion retrofit
- Cyber-Informed Engineering applied at the first P&ID: critical functions identified, consequences bounded by physics
- Operator environment built on the same Plant Intelligence shell that runs conventional facilities today
A plant that accumulates operating history
Process flow diagrams, system architecture and control narratives for each balance-of-plant system; a plant model built in NEXUS; a supervisory and operator layer that is already running when the fusion heat source is commissioned. The work product is documented in the HELIA program pages and delivered as engineering, not as a promise.
Most of the risk is in the plant we already know
Pumps, exchangers, turbines, cryogenics and switchgear are mature engineering. Treating them that way, with control architecture that does not wait for the machine, moves the balance-of-plant risk off the fusion developer's critical path and gives the operators years of experience before the plasma era begins.
Capability brief. Describes how Porritt Inc. performs this work with its own tools and engineers; it is not a customer case study and states no customer names, contract values or measured outcomes. Results depend on the facility, the data available and the scope agreed.
HELIA — Fusion Balance of Plant
The plant around the plasma: renders, scope, FAQ.
I&C and SCADA
Instrumentation, control and supervisory architecture for the balance of plant.
Cyber-Informed Engineering
Consequence-driven design applied to the plant.
Operator training modernization
AI-assisted training content for operators and mechanics.
Discuss the plant around your machine.
Fusion developers, national laboratories and utilities: a balance-of-plant architecture review starts from your heat envelope and your site.
FUSION COLLABORATION INQUIRY → All capability briefs →