---
id: "entity-three-mile-island"
type: "entity"
entityType: "place"
canonicalName: "Three Mile Island Unit 1 (Crane Clean Energy Center)"
aliases: ["Three Mile Island Unit 1", "Crane Clean Energy Center"]
source_timestamps: ["§ The Incumbent's Energy Playbook", "¶13"]
tags: ["nuclear-power", "infrastructure"]
related: ["entity-microsoft", "entity-constellation-energy"]
sources: ["futures"]
sourceVaultSlug: "hbr-seg-futures"
originDay: 2
articleStem: "hbr-nm-101-energy-strategy-ai"
sourceUrl: "https://hbr.org/2026/06/your-company-needs-an-energy-strategy-for-ais-next-phase"
sourceTitle: "Your Company Needs an Energy Strategy for AI’s Next Phase"
---
# Three Mile Island Unit 1 (Crane Clean Energy Center)

## Profile
A nuclear power plant (Unit 1) intended to be restarted as the **Crane Clean Energy Center** (project page via constellationenergy.com).

## Role in the source
The physical asset at the center of the deal between [[entity-microsoft-d2]] and [[entity-constellation-energy]], adding roughly **835 megawatts** of carbon-free electricity to the grid to support AI workloads. It is the flagship illustration of hyperscalers organizing AI infrastructure directly around physical energy access — see [[claim-hyperscalers-moving-upstream]].