Recent developments surrounding the proposed restart of Three Mile Island's Unit 1, rebranded as the Crane Clean Energy Center, have spotlighted critical weaknesses in the U.S. electric grid. While Constellation Energy maintains its target of resuming operations in the second half of 2027 to supply Microsoft data centers, PJM Interconnection—the regional grid operator—has indicated that full deliverability may not occur until 2031 due to required transmission upgrades.[1][2] This four-year gap underscores decades of underinvestment in transmission infrastructure, permitting delays, and massive interconnection backlogs that affect both traditional and new energy projects alike.

Constellation has responded by announcing plans to seek regulatory intervention from the Federal Energy Regulatory Commission (FERC) to accelerate grid connection rights and has reaffirmed its 2027 timeline for initial output. The company argues the 2031 date reflects only the point of guaranteed full capacity, not a prohibition on earlier partial operations. However, the situation reveals a systemic issue: the U.S. grid is struggling to accommodate surging demand from data centers, electrification, and industrial growth, regardless of the power source.[3]

This is not an isolated case. PJM's interconnection queue and similar bottlenecks nationwide have stalled thousands of gigawatts in projects, with transmission projects routinely facing 5-7 years of delays. The Three Mile Island restart, backed by a $1 billion federal loan, was hailed as a key step in nuclear revival amid AI-driven power needs, yet it now illustrates how bureaucratic and infrastructural inertia threatens energy security. Beyond green energy rhetoric, the delay points to deeper policy failures in modernizing the grid to match real-world demand growth.