Power supply & grid · NEWS BRIEF

Google signs a 20-year deal to support 890 MW of nuclear uprates

By Grid & Silicon · Published October 6, 2026
Source: Google and Constellation joint announcement · October 6, 2026

What happened

Google and Constellation say a 20-year power-purchase agreement will finance equipment and technology upgrades intended to add 890 megawatts across 11 operating nuclear units in Illinois, Pennsylvania and New Jersey.

What the contracts cover

The companies say Constellation will invest more than $4.3 billion in uprates across six nuclear sites containing 11 reactor units. The first added output is targeted for 2028, with the full 890 megawatts expected before the end of 2032. Those dates and megawatts are delivery targets; the announcement does not say that any of the incremental capacity is operating today.

A separate 15-year supply agreement covers 2,700 megawatts from Constellation's existing PJM fleet. That 2,700-megawatt block is not additional generation created by the uprates. It is an energy-supply commitment designed, according to the companies, to support the economics of plants that already operate.

How an uprate creates more power

A nuclear uprate increases a reactor's usable electrical output by modernizing equipment such as turbines, steam generators and digital controls. The plants and their grid connections already exist, so the projects avoid many of the site-development and interconnection steps required for an entirely new generating station. They still require engineering, equipment installation, outages and applicable regulatory approvals.

Google's long-term purchase commitment provides revenue certainty for Constellation to fund those upgrades. The agreement also calls for demand-response and load-shaping capabilities that could reduce non-critical consumption during stressed grid conditions. It does not disclose the curtailment volume, trigger rules or which Google facilities would participate.

What remains unknown

The announcement does not disclose the contract price, the output assigned to each reactor, construction sequencing or the approvals still needed for each unit. It also does not map the purchased electricity to individual Google data centers. Power injected into PJM serves the regional system; contractual accounting and grid operation are separate from a dedicated wire to one campus.

Google and Constellation say the arrangement will not shift uprate costs to other ratepayers. That is a company claim tied to the commercial structure, not an independently audited finding in the release. The next concrete milestones are unit-level approvals, outage work and measured increases in generating capacity.

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