Why Boiling Water Reactors?
Momentum Power does not propose exotic or unproven technology. Our design is based on Boiling Water Reactors (BWRs), one of the most mature and widely deployed reactor types in the world.
TRULY
ULTRA-MODULAR: Shipyard-assembled and refueled, ROV/AUV installed and maintained, based on decades of subsea oil & gas experience
SAFE: Passive safety with the ocean serving as the ultimate heat sink, using proprietary emergency cooling systems that operate independently and autonomously
SIMPLE: Natural-circulation
Seafloor Boiling Water Reactor (SFBWR) eliminates pumps and steam generators, demonstrated at Dodewaard for 28 years
without water pools, reactor buildings, or cooling towers. Expandable and retrievable to meet variable demand, delivering a far better return on capital than a single large, fixed land-based nuclear asset
than land-based nuclear power plants by eliminating concrete, through fully modular components, remote operations, and a long refueling period (>5 years) with low-enriched Uranium (LEU)
The "wet-open" power lattice layout can be deployed significantly faster than traditional land-based nuclear power plant, with factory-built, shipyard-assembled ultra-modular construction
Next-Generation Output, with Proven Architecture
The Momentum Power plant consists of a lattice of BWRs, turbine-generators, and supporting systems and proven marine grid-connections. Each SFBWR (seafloor boiling water reactor) module will produce 50-100MWe, and will be designed such that the installation can easily be scaled by adding additional modules, to create 200, 500, or even 3000MWe for a customer on shore or undersea.
Momentum’s standardized reactor modules are factory-finished in Tier-1 shipyards using concrete-free modular assembly to improve quality, consistency, and speed.
Each reactor module is rigorously tested and validated under controlled conditions to ensure safety, reliability, and long-term performance before deployment.
Once deployed, the plant is operated and monitored remotely with no seafloor crew, while autonomous systems support continuous inspection and hot-swap servicing.
Factory Production and Modular Deployment
Our approach eliminates on-site concrete construction entirely.
Everything will be manufactured under controlled shipyard conditions using proven industrial processes learned from the offshore oil and gas industry, which has decades of experience deploying complex unmanned production on the seafloor.
Extensive operating history and validated safety methodologies
Regulatory familiarity and well-defined licensing pathways
An unparalleled safety and reliability record in U.S. naval propulsion
Safe by Design. Safe by the Ocean.
Multiple independent layers of passive protection remove decay heat without power or operator action, even in a full station blackout. And the surrounding ocean itself acts as a virtually unlimited heat sink, always available regardless of weather, season, or fuel logistics.
Momentum's Seafloor Boiling Water Reactor is engineered to protect itself, with no operators on site, no external power, no active systems required.
Walkaway-Safe by Design: shuts down and cools itself using natural circulation alone. No pumps, generators, or on-site crew required.
Multiple Independent Safety Layers: passive cooling, low-pressure operation, sealed modular containment, and continuous remote monitoring all work together, even in a full blackout.
Distance & Zero Marine Impact: sited ~12 nautical miles offshore, beyond emergency planning zones. An MIT-led study projects minimal marine impact, even under worst-case scenarios.
