Amazon's 20-year power agreement with Constellation Energy sent a clear signal this week: the biggest AI spenders are willing to finance new nuclear capacity through existing grid operators rather than bypass them. The $3 billion commitment to expand one of Constellation's plants will feed the regional grid, not Amazon's data centers directly, and the market read it as validation for the utility-first model that NuScale Power has been pitching.
The grid stays in the picture
The structure matters. Amazon could have contracted for dedicated off-grid generation, a path some startups are selling to hyperscalers. Instead it chose a deal that adds baseload to the system Constellation already operates. That keeps the utility in the loop and the regulator in the room, exactly the framework NuScale's small modular reactors are designed for.
NuScale's two utility anchors
NuScale has two announced utility agreements. One is a modest deployment in Romania. The other, a 6-gigawatt project in the eastern United States, would be the largest SMR installation anywhere if it reaches commercial operation. Neither has broken ground, but both rest on the premise that utilities will remain the counterparty of choice for large-scale nuclear new-build.
Oklo takes the direct route
Oklo has pursued a different strategy, marketing its reactors straight to data-center operators. The company touts a pipeline of non-binding agreements with hyperscalers, yet none have advanced to commercial production. Amazon's choice to work through Constellation rather than strike a bilateral deal with an SMR developer underscores the practical hurdles of the direct model.
McKinsey's $7 trillion backdrop
The consulting firm estimates global data-center capital expenditure could hit $7 trillion by 2030. Energy availability is already a binding constraint on that build-out. Amazon's move shows one way the constraint gets loosened: incumbent generators get fresh capital to expand, and the grid gets more electrons. NuScale's thesis is that its modular design lets utilities say yes faster and cheaper than a traditional large reactor.
What to watch next
The Constellation expansion still needs regulatory approval and construction execution. NuScale's 6-gigawatt project faces the same gauntlet. The market's reaction this week suggests investors are pricing a higher probability that the utility channel delivers, but the track record for nuclear new-build in the U.S. remains thin.