Country
United States
AI data center dossier
Crane Clean Energy Center (Three Mile Island Reactivation)
Middletown, Northeastern United States, United States/datacenters/three-mile-island-reactivation.html
Operator
Constellation Energy, Microsoft
Energy
Nuclear
Known capacity
835 MW
Evidence profile
Readiness reflects whether the record has citations, narrative context, structured power data, coordinates, and at least one dated milestone.
Readiness
86%
Sources attachedVerified
3 citations linked
CoordinatesPublished
40.1539, -76.7247
Timeline evidenceMissing
Announcement and delivery timing still absent
Machine-readable outputsPublished
HTML, JSON, and GeoJSON all available
Machine-readable outputs
Canonical record surfaces for audit, programmatic use, and direct citation.
Record Notes
Constellation Energy, in partnership with Microsoft, is restarting the undamaged Unit 1 reactor at Three Mile Island, rebranded as the **Crane Clean Energy Center**. The facility will provide 835 MW of carbon-free electricity exclusively to Microsoft under a 20-year power-purchase agreement (PPA) extending to 2054. This deal represents the first-ever restart of a decommissioned nuclear reactor in the United States and highlights the extreme energy demands of next-generation AI data centers.
The restart project involves a $1.6 billion investment to upgrade the plant’s turbine, generator, main transformer, and control systems. Unit 1 is physically separate from Unit 2, which was the site of the 1979 accident and is currently being decommissioned. The Crane Clean Energy Center is expected to be operational by late 2028, providing the firm, "always-on" baseload power required for Microsoft’s AI training clusters while contributing $16 billion to Pennsylvania's GDP over the life of the agreement.
Analyst Flags
- Timeline fields are missing, so sequence and delivery timing are still weak.
Timeline Signals
No dated milestones are published for this facility yet.
Nearby Facilities
Other tracked AI data centers within 300 km of this location.
Related Facilities
Intelligence Reports
Structured analysis covering this facility's operator and market context.
Frequently asked questions
- How big is Crane Clean Energy Center (Three Mile Island Reactivation)?
- Crane Clean Energy Center (Three Mile Island Reactivation) has 835 MW of known IT capacity, located in Middletown, Northeastern United States, United States. It ranks #50 globally by capacity among 335 tracked facilities.
- What is the status of Crane Clean Energy Center (Three Mile Island Reactivation)?
- Crane Clean Energy Center (Three Mile Island Reactivation) is currently planned. No dated milestones have been published yet.
- Who operates Crane Clean Energy Center (Three Mile Island Reactivation)?
- Crane Clean Energy Center (Three Mile Island Reactivation) is operated by Constellation Energy and Microsoft. Structured intelligence reports are available for Constellation Energy Operator Report and Microsoft Operator Report and United States Country Report.
- What energy source does Crane Clean Energy Center (Three Mile Island Reactivation) use?
- Crane Clean Energy Center (Three Mile Island Reactivation) is powered by nuclear energy and is focused on 24/7 clean power for azure ai workloads. This is backed by 3 cited sources.