Charting the fastest path to new nuclear.

We are adding 10 gigawatts
to America’s nuclear fleet.

Alva is rewriting the economics of nuclear deployment to deliver gigawatts of clean power in years, not decades. It's nuclear energy, at the speed and cost of gas.

Each 250-300 MWe Alva Uprate costs around $1 billion and can be deployed in less than 2 years following procurement, avoiding the multi-year delays and budget overruns of traditional nuclear construction.

10 GWe

U.S. Fleet Potential

80 TWh/yr

250-300 MWe

Unlocked at Each Reactor

Equivalent to a Large SMR

$1 Billion

Cost Per Uprate

Delivered Firm-Fixed-Price

<2 Years

Construction Time

Following Procurement

By building on technologically mature, regulator-ready methods proven in operating reactors, Alva avoids the uncertainty and risk inherent in first-of-a-kind nuclear designs.

The Alva Uprate adapts the successful ~20% uprate completed at Sweden’s Ringhals Unit 4. This uprate was enabled by advances in nuclear fuel, steam generators, and thermal-hydraulic safety analysis — technologies now fully NRC-licensed and supported by more than 100 reactor-years of safe operation.

  • 01

    Advanced Steam Generators

  • 02

    Second Turbine Plant (2TGP)

  • 03

    DUO-SYNC Control

Replacement steam generators increase heat-transfer surface area, improve coolant flow, and lower primary cold-leg temperatures, enabling higher reactor thermal power while maintaining or improving safety margins.

Excess steam is routed to Alva’s second turbine, built outside the protected area, to produce 250–300 MWe of additional power, allowing the existing turbine to operate within its proven limits.

Alva’s dual-redundant digital control system integrates the reactor, existing turbine, and 2TGP into a single coordinated unit—maintaining stable operation and safety across all conditions.

  • 01

    Advanced Steam Generators

  • 02

    Second Turbine Plant (2TGP)

  • 03

    DUO-SYNC Control

Replacement steam generators increase heat-transfer surface area, improve coolant flow, and lower primary cold-leg temperatures, enabling higher reactor thermal power while maintaining or improving safety margins.

Excess steam is routed to Alva’s second turbine, built outside the protected area, to produce 250–300 MWe of additional power, allowing the existing turbine to operate within its proven limits.

Alva’s dual-redundant digital control system integrates the reactor, existing turbine, and 2TGP into a single coordinated unit—maintaining stable operation and safety across all conditions.

Alva streamlines nuclear uprates into repeatable, turnkey projects. Our drop-in delivery model minimizes demands on utilities, retains learning across projects, and reduces both risk and cost from site to site.

For Utilities

Turnkey Capacity Upgrades

Large uprates become a turnkey capacity upgrade rather than a multi-year organizational lift. Alva integrates with plant operations and outage planning, limiting demands on utility engineering and management staff—eliminating the need to build (and later dismantle) large stand-alone uprate teams.

For Power Purchasers & Project Investors

Financeable Infrastructure

Standardized scope and delivery convert uprates from one-off engineering efforts into repeatable, financeable infrastructure projects – offering customers a scalable path to gigawatts of new power. Off-balance sheet financing allows utilities to participate in high-value PPAs without regulatory delay.

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