DOE offers Constellation up to $5 billion for 1.1 GW of nuclear uprates
Serguey Asael Shinder1 min readThe US Department of Energy's Office of Energy Dominance Financing has announced a conditional loan commitment of up to $5 billion to finance uprates and modernisation across Constellation Energy's nuclear fleet. The work is expected to add nearly 1.1 GW of capacity in the PJM and MISO regions.
The plants named are Braidwood, Byron, Clinton, Dresden, LaSalle and Quad Cities in Illinois, Calvert Cliffs in Maryland and Limerick in Pennsylvania. The commitment also includes an option to finance future uprates at other Constellation facilities. DOE says the projects would supply enough electricity for more than 930,000 homes and support more than 10,000 project-related jobs.
The loan follows an executive order directing DOE to facilitate 5 GW of uprates from existing reactors and the UPRISE programme launched in March 2026 to maximise output from the current fleet. DOE says 95% of the 5 GW uprate and restart goal has now been identified.
The department is explicit about what "conditional" means: Constellation must satisfy technical, legal, environmental and financial conditions before definitive financing documents are signed and money is disbursed.
What it means
Uprates are the cheapest nuclear megawatts available — more output from licensed sites, without new reactors or new siting fights — and 1.1 GW is roughly the size of one large new unit. The caveat is in the word conditional: this is a statement of intent, and earlier conditional commitments have taken a long time to close. "Identified" in the 95% figure likewise means projects named, not capacity delivered.