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Constellation Energy · Londonderry Township, Dauphin County, PA · PennsylvaniaDEVELOPER HEALTHHEALTHY
Restart of the former Three Mile Island Unit 1. Constellation still targets 2027, though PJM studies suggest full grid interconnection could slip into the 2030s.
Power
835 MW
Fission · Scaling
Storage
—
energy capacity
Online
2027 (Constellation target)
approximate target
Capital committed
$1.0B
closed or awarded
Capital pending
—
conditional or under review
How it works
Today's fleet and most near-term SMRs. Uranium fuel heats ordinary water under high pressure; the steam spins a turbine and the water is cooled and pumped back.
OPEN IN 3D →DOE loan $1.0B
Sources: world-nuclear-news.org · world-nuclear-news.org
Microsoft
20-year PPA (2024) for the full output
STEP 4/6 · AT RISK HALEU is the bottleneckMost advanced designs need HALEU (5–20% enriched), with no commercial US supply at scale yet.
STEP 4/4 · WATCH Office relaunched as Energy Dominance FinancingLending shifts toward nuclear and utility expansions (AP1000 offers, Constellation uprates).
Critical inputs
Policy that applies
Developer
Buyers
Lenders and investors
Place