DOE Issues Conditional Loan Commitment to Constellation for Nuclear Uprates Across Nine Plants
Federal Financing Framework
The US Department of Energy launched its Utility Power Reactor Incremental Scaling Effort, known as UPRISE, in March of this year with a target of adding 5 GW of nuclear generating capacity by 2029. The programme focuses on power uprates, life extensions, and facility restarts as the most cost-effective near-term routes to capacity growth, with an interim milestone of 2.5 GW by the end of next year and a further 2.5 GW within three years after that.
Under UPRISE, the DOE's Office of Energy Dominance Financing holds more than USD 289 billion in available loan authority and is authorised to cover up to 80% of eligible project costs for qualifying uprate work at attractive interest rates. The office is also tasked with facilitating collaborative agreements between plant owners and end users.
Scope of the Conditional Commitment
Constellation has received a conditional loan commitment under UPRISE covering planned uprate investments at nine facilities: Braidwood, Byron, Clinton, Dresden, LaSalle, and Quad Cities in Illinois; Calvert Cliffs in Maryland; and Limerick in Pennsylvania. The combined capacity addition across these sites is nearly 1.1 GWe.
The commitment also includes an option to finance future uprate projects at additional Constellation facilities beyond those currently identified. However, the arrangement remains subject to completion of due diligence, negotiation of definitive financing documents, and satisfaction of applicable conditions. It does not constitute a final decision to proceed at every facility under consideration.
Private-Sector Demand as a Catalyst
Constellation noted that the federal commitment builds on substantial private investment already in place. Separate 20-year power agreements with Google and Amazon have underpinned a commitment by Constellation to invest more than USD 7 billion to add approximately 1,080 MW of nuclear capacity. An agreement with Meta, announced last year, supports a 30 MW expansion specifically at the Clinton Clean Energy Center in Illinois.
The company stated that these long-term offtake arrangements demonstrate how large energy consumers can enable new reliable generation that feeds into regional grids and benefits a broader customer base. The conditional DOE loan is expected to lower financing costs and allow Constellation to advance projects at greater scale and pace than private capital alone would support.
Conditions and Next Steps
If the loan commitment is finalised, Constellation has indicated it will continue engagement with the DOE, customers, regulators, and local stakeholders to advance individual uprate projects. The conditional nature of the commitment means each facility will require separate project-level decisions before work proceeds.
The United States has a stated national goal, announced by President Donald Trump, of expanding the country's nuclear generating capacity from 100 GW to 400 GW by 2050. The UPRISE initiative and this commitment to Constellation represent early steps toward that longer-term objective.