US nuclear operators are steadily squeezing more electricity from the existing reactor fleet through power uprates, a lower cost path to added capacity than building new plants. Federal data quantify the scale of the effort now underway and the potential it holds for the grid.

The Nuclear Regulatory Commission's list of expected applications identifies about 30 planned uprates through 2030, broken down into 10 measurement uncertainty recapture uprates, two stretch power uprates, and 18 extended power uprates. Timing is concentrated in the near term, with three applications expected in 2026, 16 in 2027, and eight in 2028. Together those projects represent roughly 2.5 gigawatts, or about 7,694 thermal megawatts, of potential new capacity if all are approved and carried out.

The track record behind those projections is substantial. Over the past 20 years, NRC approved uprates have added about 6 gigawatts to the grid, an amount comparable to six large reactors, achieved by upgrading equipment and revising operating parameters at plants already in service.

Industry interest points to further gains, with utilities signaling that additional uprate requests could bring roughly another 2 gigawatts online in the years ahead. Because uprates avoid the extended timelines and capital costs of new construction, they have become a favored tool for expanding carbon free baseload output as electricity demand accelerates.

Source: Nuclear Regulatory Commission - https://www.nrc.gov/reactors/operating/licensing/power-uprates