Constellation Energy and Microsoft fast-track Crane Clean Energy Center reopening to power AI data centers and boost regional jobs
Three Mile Island Restart (Courtesy AP)Harrisburg, Pennsylvania (Times Media Service) – The Three Mile Island Restart is now expected in 2027—one year sooner than initially planned—after Constellation Energy secured fast-track grid approvals and a 20-year power purchase deal with Microsoft to supply its AI data centers.
Early Restart Timeline and Fast-Track Approval
Constellation Energy announced on June 25, 2025, that PJM Interconnection expedited the grid connection process, allowing Unit 1 to come back online in 2027 instead of 2028. PJM prioritized integrating the plant’s 830 MW output to meet rising regional electricity demand. Company officials noted that planning and permit reviews moved swiftly, with NRC inspections slated for later this summer. This accelerated timeline reflects a national push to leverage existing nuclear assets amid energy-security concerns.
Crane Clean Energy Center Upgrade Plans
Unit 1, now renamed the Crane Clean Energy Center in honor of late Exelon CEO Chris Crane, will receive an estimated $1.6 billion in renovations to modernize safety systems and restore equipment idled in 2019. Key upgrades include replacing diesel fuel tanks, overhauling transformers, and refurbishing cooling systems. Constellation expects to complete rehabilitation by late 2026, allowing comprehensive testing before operations resume. Enhanced digital monitoring and control systems will bolster plant reliability and ensure compliance with current NRC standards.
Role of Constellation Energy and Microsoft Partnership
The 20-year power purchase agreement with Microsoft underpins the project’s financial viability, securing a stable revenue stream for Constellation Energy. Microsoft will draw nuclear-generated, carbon-free electricity to power its AI data centers, aligning with its goal to decarbonize operations by 2030. Bobby Hollis, Microsoft’s VP of Energy, noted that “facilities like the Crane Clean Energy Center are once-in-a-lifetime assets for AI infrastructure.” This collaboration exemplifies a broader trend of tech companies investing in nuclear energy to meet surging power needs sustainably.
Safety and Regulatory Oversight
Though Unit 1 was not involved in the 1979 partial meltdown of Unit 2, safety remains paramount after its 2019 shutdown for economic reasons. The NRC will conduct rigorous inspections, including fuel-loading procedures and emergency response drills, before issuing the operating license. Pennsylvania Governor Josh Shapiro has voiced support, highlighting the plant’s enhanced safety culture and adherence to modern regulatory regimes. Local and federal oversight will continue throughout commissioning to reassure communities of the plant’s safe operation.
Economic and Community Impact
Restarting Three Mile Island is projected to create over 650 full-time jobs at the facility and generate thousands of indirect roles in construction and services. The influx of skilled labor and contractor activity could contribute more than $200 million annually to Dauphin County’s economy. Property tax revenues are expected to support local schools and infrastructure, reversing declines following the 2019 closure. Community engagement programs, including plant tours and safety workshops, aim to rebuild public trust and promote STEM education in surrounding areas.
Reaction from Local and National Stakeholders
Many residents and business leaders in Central Pennsylvania have welcomed the restart for its job opportunities and clean-energy benefits. Environmental groups cautiously praised the carbon-free power potential but urged transparency on waste disposal and decommissioning plans. National energy analysts view the project as a bellwether for reviving other mothballed plants, signaling a renaissance in U.S. nuclear energy. Critics caution against cost overruns and regulatory delays, but Constellation’s early progress has bolstered confidence in the initiative.
Joel Patterson / Business Writer (Times Media Service)
Business contributor with 30+ years in business strategy and hedge fund facilitation. Economic strategist and industry advisor.
jpatterson@timesmediaservice.com
