Small Modular Reactors Could Change How We Power the Grid

A traditional nuclear plant is a decade-plus megaproject measured in gigawatts. A small modular reactor is something different by design: built in factory-standardized modules, sized in the tens to low hundreds of megawatts rather than a full gigawatt, and pitched as fast and cheap enough to deploy that a utility — or a tech company — could plausibly order one the way it orders equipment, not commission it the way it commissions a power plant. In 2026, that pitch is being tested with real money, from some surprising buyers.

Why utilities want them now

The appeal for utilities is straightforward: grid reliability without the multi-decade lead time of a conventional nuclear plant, and low-carbon generation that isn't weather-dependent the way solar and wind are. Ben Olbrich of the Los Alamos County Department of Public Utilities framed the economics plainly, noting that if SMRs land around $120 per megawatt-hour, "that's still comparable to what we're seeing now for natural gas units." Los Alamos County is specifically evaluating 5–20 megawatt microreactors paired with energy storage, and Kit Carson Electric Cooperative is exploring similar localized generation alternatives — both examples of smaller, rural utilities looking at SMRs as a hedge against transmission constraints rather than a wholesale replacement for the grid.

Who's actually signing deals

The private-sector commitments are larger and further along than most utility pilots. Google's agreement with Kairos Power targets up to 500 megawatts of SMR capacity by 2035, structured as an "order book" model designed to standardize the reactor design and drive down costs the way a manufacturing production line would, rather than treating each reactor as a one-off project. Amazon and Microsoft have both signed their own nuclear development deals, part of the broader tech-industry nuclear buildout we've covered separately. On the military side, Antares Nuclear has been selected to deploy microreactors at Joint Base San Antonio, with the U.S. Army and Air Force both moving toward SMRs for installation power resilience — a signal that the appeal isn't limited to hyperscalers chasing AI data center load.

"If [SMRs] come along and they're $120 a megawatt-hour equivalent, that's still comparable to what we're seeing now for natural gas units." — Ben Olbrich, Los Alamos County Department of Public Utilities

The obstacle nobody's solved: getting on the grid

The hardest problem with SMRs has nothing to do with reactor design. It's grid interconnection — the process of actually connecting new generation capacity to transmission infrastructure — and the queues are already backed up years deep with other projects. Lynn Mostoller of the New Mexico Renewable Energy Transmission Authority put it bluntly: "You're already too late for five years out because those resources are already in the RFP process," with realistic timelines for large-scale utility integration stretching into the 2040s in many regions. Supply chain constraints compound the problem — specialized nuclear fuel, precision components, and the transport logistics for factory-built modules all still need to scale up before SMRs can be deployed anywhere near the pace their backers are promising.

What to actually watch

The gap between corporate ambition and grid reality is the story here. Google's 500-megawatt Kairos commitment and Amazon and Microsoft's parallel deals are real, signed contracts — but they're built on a 2035-and-beyond timeline, not a solution to today's power crunch. The more immediate signals worth watching are whether Kairos and other SMR developers hit their near-term design and licensing milestones on schedule, whether more utilities beyond a handful of early movers like Los Alamos County commit to interconnection studies, and whether the supply chain for reactor components matures fast enough to support the order-book model Google is betting on. Until those move, SMRs remain a well-funded bet on the 2030s rather than a fix for the grid strain happening right now.