The Google Constellation nuclear deal is official. On October 6, 2026, Google and Constellation Energy announced a 20-year agreement to add 890 megawatts of new nuclear capacity to the PJM grid. Bloomberg had reported the day before that Alphabet was close to paying Constellation $1 billion or more. The announcement itself doesn’t put a price on the deal.
Key takeaways
- The deal adds 890 MW of new capacity through upgrades at 11 nuclear units in Illinois, Pennsylvania and New Jersey.
- The power purchase agreement runs 20 years. A separate 15-year agreement covers another 2,700 MW.
- Constellation will invest more than $4.3 billion, and the first upgrade is due by 2028.
- Constellation will also use Google Cloud and Gemini Enterprise in a five-year “AI for energy” project.
What is the Google Constellation nuclear deal?
The Google Constellation nuclear deal is a 20-year power purchase agreement announced on October 6, 2026. Google will fund upgrades at 11 Constellation nuclear units in Illinois, Pennsylvania and New Jersey, adding 890 megawatts of new capacity to the PJM grid. A separate 15-year agreement covers another 2,700 megawatts.
Constellation says the capacity is entirely new, which means it expands total supply on the grid. Google isn’t just buying power that already exists. It’s paying for plants to produce more.
How does the deal add 890 MW without building a new reactor?
It works through nuclear uprates. An uprate means replacing or upgrading equipment such as turbines, steam generators and digital control systems so an operating plant produces more electricity. Constellation says this avoids the long timelines and interconnection bottlenecks of building a plant from scratch, and the first uprate is expected by 2028.
For scale, the companies say 890 MW equals the output of several small modular reactors or one large conventional reactor. That’s the part I find most interesting. Everyone talks about SMRs, but the fastest new nuclear megawatts in this deal come from plants that are already running.
What else is in the agreement?
The press release lists several pieces beyond the 890 MW:
- A 2,700 MW supply agreement: It runs 15 years and keeps existing Constellation plants economically viable without taking power off the grid.
- Demand flexibility: Google’s load can be curtailed for non-critical use during high-stress grid events.
- Jobs: The deal sustains roughly 4,400 existing jobs and creates about 7,200 construction jobs across six nuclear sites.
- A framework for more: The two companies will explore new clean generation, storage and demand response, starting in PJM.
Why does Google want nuclear power?
Google wants nuclear power because AI data centers need electricity around the clock, and nuclear plants run around the clock. Solar and wind can’t match that on their own, and the grid is straining as AI demand rises. Nuclear also offers carbon-free supply that Google can count toward its clean energy goals.
This isn’t Google’s first move. Reuters notes that Google partnered with NextEra last year to restart an Iowa nuclear plant. It also signed a deal last month with Southern Co to support upgrades at two of its nuclear plants. In October 2024 it signed a Kairos Power agreement for up to 500 MW of small modular reactor capacity by 2035. Constellation already sells nuclear power to Amazon and Microsoft, and Meta signed a 20-year deal for the Clinton plant in 2025.
Where does AI come into the deal?
Constellation picked Google Cloud and Gemini Enterprise for a five-year technology alliance. The “AI for energy” work has three focus areas:
- Faster site selection, power flow modeling, permitting and interconnection planning for uprates.
- Plant health monitoring and outage management to keep output high.
- Security for operational technology networks, many of which are air-gapped.
So the deal is a power purchase and a cloud contract in one. Google gets nuclear megawatts, and Constellation becomes a Gemini customer.
Why does the PJM grid matter?
PJM is the grid operator serving 67 million people, according to Google. The companies describe the deal as a direct answer to PJM’s “Bring Your Own Power” proposal, where large power users bring new supply along with their demand. Google says the structure avoids passing costs to residential customers.
Whether it does is the question to watch. Consumer advocates in PJM states have been loud about data center costs, and a press release isn’t proof. The actual pricing terms aren’t public.
What happens next?
Expect three things:
- Regulatory work: Each uprate needs approvals, and timelines can slip.
- First megawatts by 2028: That’s the first real test of the schedule.
- More deals: Constellation’s stock rose roughly 4% on the Bloomberg report, and every big cloud company now has a nuclear contract. The race for firm power isn’t slowing down.
FAQ
How much is the Google Constellation nuclear deal worth?
Bloomberg reported Google would pay Constellation $1 billion or more over a multi-year agreement. The official announcement doesn’t state a contract value. It does say Constellation will invest more than $4.3 billion in new equipment and technology at its nuclear units.
How much power will Google’s deal with Constellation add?
The 20-year agreement adds 890 megawatts of new nuclear capacity to the PJM grid. A second, 15-year agreement covers another 2,700 megawatts from Constellation’s existing fleet. The 2,700 MW isn’t new capacity. It keeps existing assets economically viable while still feeding the grid.
What is a nuclear uprate?
A nuclear uprate is an upgrade to an operating plant that increases its electricity output. It usually means modernizing turbines, steam generators and control systems. Uprates add capacity faster than building new reactors, and the first one in this deal is expected by 2028.
Which states are involved?
The upgrades cover 11 Constellation-owned nuclear units across six sites in Illinois, Pennsylvania and New Jersey. All of them serve the PJM Interconnection grid, which covers a large part of the Mid-Atlantic and Midwest.
Is this Google’s first nuclear power deal?
No. Google has signed agreements with Kairos Power, NextEra (an Iowa plant restart) and Southern Co, and this latest deal with Constellation comes alongside similar deals by Amazon, Microsoft and Meta. It is Google’s largest announced move into the existing nuclear fleet.
