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Christopher M. Crane Clean Energy Center Restart

Londonderry Township / Middletown, Pennsylvania, United StatesUnder construction
Evidence
Planned / design
835 MW
Updated
Oct 28, 2026
Utility
PJM Interconnection

A Federal Register notice published September 25, 2026 records the final environmental finding of no significant impact for the proposed Crane reauthorization. This environmental finding is not final safety approval or authorization to restart the reactor. Constellation is restarting the 835-MW former Three Mile Island Unit 1 under a 20-year Microsoft power-purchase agreement, subject to nuclear and grid approvals. Christopher M. Crane Clean Energy Center Restart is in Londonderry Township / Middletown, PA, US and is a energy asset restart with construction status.

Capacity

Nameplate capacity

Planned / design or future potential

835 MW

Source

Operating IT capacity: Not established in published records

A missing figure does not mean zero. Planned, utility and generation figures are not operating IT capacity.

Development

Restart engineering, restoration and licensingUnder construction

1 building

One 835-MW nuclear unit; Unit 2 excluded.

Grid reconnection and commercial operationAnnounced or preconstruction

2027 generation target; final restart approvals remain pending.

Milestones (5)
Constellation announces restart and Microsoft PPA

Sep 20, 2024 · Recorded actual event

Completed · Announced

Source not linked
DOE closes $1B loan

Nov 19, 2025 · Recorded actual event

Completed · Financing

Source not linked
NRC publishes restart amendment applications

Feb 24, 2026 · Event timing type not established

In progress · Permit filed

Source not linked
FERC grants capacity-rights waiver

Jun 2026 · Recorded actual event

Completed · Permit approved

Source not linked
Target generation year

2027 · Forecast / planned record

Forecast · Forecast completion

Source not linked

Participants

Constellation Energy Generation, LLC

Owner

Sources by role
Owner (1)
Owner (1)
Microsoft

Customer

Sources by role
Customer (1)
Other participants (5)
Federal Energy Regulatory Commission

Government authority

Sources by role
Government authority (1)
Federal Financing Bank

Lender

Sources by role
Lender (1)
PJM Interconnection

Utility provider

Sources by role
Utility provider (1)
Utility provider (1)
U.S. Department of Energy, Energy Dominance Financing

Government authority

Sources by role
Government authority (1)
U.S. Nuclear Regulatory Commission

Government authority

Sources by role
Government authority (1)
Government authority (1)

Capital & incentives

Capital claims and financing records may overlap. Their amounts are not added together.

Capital claims

Doe guaranteed loan

Source report

$1,000,000,000

Source

Restart cost estimate

Source report

$1,600,000,000

Source

Financing records

Debt financing

$1bn

Nov 18, 2025

Federal Financing Bank loan guaranteed through DOE program; partially finances restart.

Parties & sources

Constellation Energy Generation, LLC (Borrower) · Federal Financing Bank (Lender) · U.S. Department of Energy, Energy Dominance Financing (Other)

Sources (2)

Investment commitment

$1.6bn

Jun 3, 2026

Reported restart-cost estimate; not an executed debt or equity facility.

Parties & sources

Counterparties not specified.

Sources (1)

Site & development

Construction jobs

Source report

3,400 jobs

Source

Technical specifications

Target commercial generation year

Actual

2027

Source

Additional project facts

PPA term

Source report

20 years

Source

Transferred interconnection rights

Source report

760 MW

Source

Nrc restart approval

Actual

Pending

Source

Infrastructure & permits

Technical details (2)
Onsite generation

Under construction

835 MW nameplate

Former TMI Unit 1; Unit 2 excluded.

Electric grid

Secured or contracted

760 MW CIR

Rights transferred from Eddystone to support restart; not a dedicated generation asset or nameplate value.

Other · Under review

Christopher M. Crane Clean Energy Center Unit 1

U.S. Nuclear Regulatory Commission

Feb 24, 2026

Sources (2)
Interconnection · Issued

Crane/Eddystone interconnection-rights transfer

Federal Energy Regulatory Commission

Jun 1, 2026

Sources (1)

Public-source research. Plans may change. See Evidence for sources and qualifications.

Related projects (1)
AWS Susquehanna / Cumulus Campus

Operational and expanding · Salem Township, Luzerne County, Pennsylvania, United States

Shared participant: Federal Energy Regulatory Commission · Shared participant: PJM Interconnection · Same market: Pennsylvania, United States

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