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Constellation Energy says a 20-year agreement with Google will support upgrades adding 890 megawatts of generating capacity at 11 existing nuclear plants in the PJM region. The projects are expected to cost more than $4.3 billion, with the first completed by 2028 and the full group in the early 2030s. The added capacity is planned, not yet operating, and the agreement’s full commercial terms were not reported.
Constellation Energy and Google have agreed to a 20-year arrangement to support upgrades adding 890 megawatts of generating capacity at 11 existing nuclear plants in the PJM region. Constellation says the program will cost more than $4.3 billion, with its first project expected to be completed by 2028 and the full set of upgrades in the early 2030s.
The planned work consists of nuclear power uprates: equipment and technology upgrades at operating plants intended to increase output without constructing new reactors. Constellation spokesperson Paul Adams told Canary Media that upgrades will vary by plant, but may involve more efficient turbines, steam generators and digital control systems. The announcement does not describe new nuclear reactors or a restart of a closed plant.
Two named projects are at Limerick in Pennsylvania, where Constellation plans to add 348 MW to the plant’s 2,317 MW of capacity, and Salem in southern New Jersey, set for a 97 MW increase from its existing 2,327 MW. The source report did not detail the planned capacity increases at each of the other nine plants. The full program’s budget works out to slightly more than $4,800 per kilowatt, according to Constellation.
The project follows other corporate-backed nuclear capacity deals. Constellation and Meta previously announced an agreement involving a 30 MW uprate at another plant, while Georgia Power and Google agreed to support 96 MW in upgrades at two Georgia nuclear stations. A separate federal loan announced the day before the Constellation-Google news will support upgrades at three Vistra plants, including 433 MW of uprates backed by Meta, according to the source report.
More Capacity for PJM’s Tight Grid
The agreement adds to plans for new electricity supply in PJM, a 13-state grid region that includes major population centers and a fast-growing data-center market. PJM says demand across its footprint is expected to rise by more than 5% annually over the next decade, while retail power prices could rise as much as 60% by 2030. Those are projections reported by Canary Media, not guaranteed outcomes.
Existing nuclear plants provide electricity with relatively high utilization: the U.S. Department of Energy puts the average nuclear fleet capacity factor at 92.3%. A capacity factor measures actual output against the maximum possible over a period; it does not mean every plant runs continuously at full output. PJM spokesperson Jeff Shields said added supply could help meet reliability needs and ease upward pressure on prices. The size of any price or reliability effect from these particular projects has not been established.
Long-term corporate power agreements can give generators a committed buyer while upgrades are developed. Evan Vaughan of the renewables trade group MAREC Action said agreements of this kind can support new generation across technologies. The planned nuclear additions could complement, rather than replace, renewable projects; the deal alone does not show how much electricity demand will be met by any one source.
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How Uprates Differ From New Reactors
An uprate raises the amount of electricity a nuclear plant can produce by improving or replacing equipment and systems. Because the reactor and site are already operating, such work can add capacity without the schedule and construction demands of building a new plant. The amount of work and the resulting increase differ by facility, according to Constellation.
The arrangement also fits a broader push to increase nuclear output from existing sites. The source report said the Trump administration had set a goal of adding 5 gigawatts of carbon-free nuclear capacity by 2029 without deploying a new reactor. That is an administration target, not an amount already delivered. Constellation’s projects are scheduled to finish after that target date, so the announcement should not be read as a completed contribution toward it.
Uprates are not the only route being pursued. Constellation has separately proposed a $1.6 billion effort to restart an undamaged reactor at the Pennsylvania plant formerly known as Three Mile Island, which it shut for economic reasons in 2019. The source compares that project’s stated cost with the uprate program, but the two efforts are different projects with different scopes and timelines.
“For the near term, uprates are the fastest, most practical and cost-effective ways to add reliable, clean nuclear capacity.”
— Judi Greenwald, president and CEO of the Nuclear Innovation Alliance
Project Costs and Output Details
The announcement sets out the overall capacity goal, budget and broad schedule, but the source material does not provide a complete plant-by-plant project list, individual costs, or the expected completion date for each upgrade. It also does not explain the full financial terms of the Google agreement, including how power purchases and project spending are allocated.
The 890 MW is planned additional generating capacity, not electricity already being produced. Actual output will depend on project completion and plant performance. The available information does not quantify how much the upgrades could change PJM power prices, emissions, or reliability, nor does it establish whether all projects will meet their expected timelines.
First Upgrade Targeted for 2028
Constellation expects to complete its first Google-backed uprate by 2028 and finish the full group in the early 2030s, Adams told Canary Media. The source material does not identify which plant is scheduled to be first. Future project announcements or regulatory filings may provide more detail on individual sites, costs and construction schedules.
For now, the agreement is a long-term plan to increase output at existing plants, not a guarantee that all 890 MW will be available by a particular date. The next milestones are the start and completion of the individual upgrades, followed by their entry into service.
Key Questions
What did Constellation and Google announce?
They announced a 20-year arrangement supporting upgrades at 11 Constellation nuclear plants in the PJM region. The planned uprates would add 890 MW of generating capacity.
What is a nuclear power uprate?
An uprate is an upgrade at an existing nuclear plant intended to increase its electricity output. Constellation says the work can involve equipment and technology such as turbines, steam generators and digital control systems.
When will the added capacity be available?
Constellation expects to complete its first project by 2028 and the full set of upgrades in the early 2030s. The company has not identified the first plant in the source material.
How much will the program cost?
Constellation puts the total budget at more than $4.3 billion, or slightly more than $4,800 per kilowatt. Individual project costs were not provided.
Does the agreement mean new reactors will be built?
No. The announced projects are upgrades to existing nuclear plants. The material does not say the agreement includes construction of new reactors.
Source: rss
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