Scaling the DEC Train to MetroVolt

MetroVolt is the burner sized and housed for data centers and cities; the DEC train is what lets it sit next to the load.

Same core, sited for the load

MetroVolt and Aegis share one burner core — a D-3He tandem-mirror generator with the same 26.49 T plug, 17 T throat, 5.44% neutron fraction, and multi-modal DEC train. The difference is the housing and siting: Aegis is a fixed defense installation, while MetroVolt is packaged for data centers and cities. The direct-conversion train is precisely what makes urban and load-adjacent siting possible.

What the DEC train enables at the load

• Almost no water: no steam cycle, so no large cooling-water demand competing with a city or data center.
• Compact footprint: no boiler, turbine hall, or condenser — it can fit constrained urban sites.
• Firm, dispatchable output: the inverter interface shapes steady power for exacting compute loads.
• Co-location: a generator that follows the load rather than the river.

What scaling actually means

Scaling to a given site is about matching the number and size of burner units, the DEC train capacity, and the grid interface to the load, not about changing the conversion physics. The converter mechanisms are the same at every scale; what changes is how many trains run in parallel and how their DC buses combine before the inverter. This modularity suits the range from a single data-center campus to a city feed.

Honest status

MetroVolt is a design-and-simulation concept. The burner test unit around 2032 is meant to validate the core and its DEC train; commercial, load-sited MetroVolt units follow only after that. The claim made here is narrow and physical: because direct conversion removes the steam cycle and its water, this generator can be sited where the electricity is used — the reason MetroVolt exists as a product line.