# Nuclear plants race to squeeze out more power

> US nuclear operators are upgrading existing reactors to meet surging electricity demand from AI data centers, but uprates alone cannot fill the gap.
- Title: Nuclear plants race to squeeze out more power | Shortify
- Summary: US nuclear operators are upgrading existing reactors to meet surging electricity demand from AI data centers, but uprates alone cannot fill the gap…
- Keywords: nuclear power, power uprates, constellation energy, vistra, electricity demand, ai data centers, google, meta, department of energy, technology, science, Nuclear
- Source: MIT Technology Review — https://technologyreview.com/2026/10/15/1146577/nuclear-power-upgrade
- Read time: 2 min
- Topics: nuclear power, power uprates, constellation energy, vistra, electricity demand, ai data centers, google, meta, department of energy, technology, science
## Constellation plans massive nuclear upgrade
Constellation, the largest US nuclear operator, announced plans to add nearly a gigawatt of new capacity across eleven existing reactors at six plants.
## Department of Energy backs Vistra upgrades
On October fifth, the Department of Energy awarded a four point two billion dollar loan to Vistra for previously announced upgrades at three plants.
## What is a power uprate?
A power uprate allows nuclear reactors to reach higher capacity by upgrading equipment. Minor uprates involve changes to instrument setpoints, while major ones can boost power by as much as twenty percent.
## Uprates were common, then rare, now returning
Between two thousand one and two thousand ten, the US Nuclear Regulatory Commission approved over eighty uprates.Between two thousand eleven and two thousand twenty, the number was thirty three.Rising AI demand has reversed the trend.
## Tech companies are funding the upgrades
Google agreed to buy electricity from Constellation plants in a twenty year agreement, a major factor in making uprates happen. Meta signed a long term deal for Vistra power.

> These are capital intensive, labor intensive projects that require a different price point than the market trades at, frankly.
## Uprates are cheaper than new reactors
Constellation's four point three billion dollar project is less expensive per kilowatt than building a new reactor, but more expensive than building new solar farms with storage or natural gas plants.
## Uprates cannot meet total demand
The US nuclear fleet has roughly ninety eight gigawatts of capacity. Between three and eight additional gigawatts are possible from uprates. PJM expects thirty gigawatts of additional peak demand from AI by two thousand thirty.
## New reactors will eventually be needed
Uprates are a relatively easy win for zero emissions power, but meeting all AI driven demand will eventually require actually building new reactors, not just upgrading existing ones.
## Key takeaway

Constellation and Vistra are upgrading US nuclear reactors to add gigawatts of capacity, backed by tech company power deals, but uprates cannot meet total AI-driven demand.