Middletown, PA · Dauphin County · 40.154°N 76.725°W
Crane Clean Energy Center (Three Mile Island Unit 1)
Constellation Energy
Key facts
- Location
- Middletown, PA, Dauphin County
- Capacity
- 835 MW planned
- Powered by
- —
- Announced
- 2024-09-20
- Last updated
Civic impact
Economics
- Investment
- $1.6B
Energy & water
- Energy source
- Nuclear
Restart of Three Mile Island Unit 1 (shut 2019). Delivers into the PJM grid. Target in-service reported as 2027 (2026 coverage) to 2028 (original 2024 announcement).
Community sentiment
Union/economic-development support alongside organized opposition (Three Mile Island Alert, Sierra Club PA, local residents) over spent-fuel storage, water use, and safety; interventions before NRC/DEP/Susquehanna River Basin Commission.
Nuclear Regulatory Commission panel hears worries, but mostly support for Three Mile Island restartStatus history
- Permitted
Constellation announces Crane Clean Energy Center restart + 20-year Microsoft PPA
Constellation to Launch Crane Clean Energy Center, Restoring Jobs and Carbon-Free Power to The Grid - Permitted
NRC issues Draft Environmental Assessment and Draft FONSI, finding the restart would have no significant environmental impacts; restoration underway pending final NRC approval (final restart decision anticipated 2027)
NRC Draft Environmental Assessment / Draft FONSI, June 8, 2026
Location
Sources & data provenance
Confirmed: data verified against official filings, permits, or direct operator announcements.
Last updated:
- Constellation to Launch Crane Clean Energy Center, Restoring Jobs and Carbon-Free Power to The GridpressConstellation EnergyRetrieved:
- U.S. Nuclear Regulatory CommissionRetrieved:
- U.S. Nuclear Regulatory CommissionRetrieved:
- U.S. Nuclear Regulatory CommissionRetrieved:
- U.S. Nuclear Regulatory CommissionRetrieved:
- U.S. Nuclear Regulatory CommissionRetrieved:
- NRC notice, license amendment applications / No Significant Hazards Consideration, Feb 24, 2026filingFederal RegisterRetrieved:
- Federal RegisterRetrieved:
- SEC EDGARRetrieved:
- E&E News (POLITICO)Retrieved:
- Pennsylvania Capital-StarRetrieved:
- Nuclear Regulatory Commission panel hears worries, but mostly support for Three Mile Island restartpressPennsylvania Capital-StarRetrieved:
- DataCenterDynamicsRetrieved:
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