DOE offers Constellation up to $5 billion for nuclear uprates across three states
A conditional DOE loan commitment could support nearly 1.1 GW of nuclear uprates across Constellation plants in Illinois, Maryland and Pennsylvania.
At a glance
- Financing
- Conditional DOE loan commitment of up to $5 billion; not a closed loan or total project budget
- Potential output
- Nearly 1.1 GW across selected existing nuclear plants
- Facilities under consideration
- Braidwood, Byron, Clinton, Dresden, LaSalle, Quad Cities, Calvert Cliffs and Limerick
- Procurement status
- No open solicitation or awarded contract announced
The U.S. Department of Energy has offered Constellation Energy a conditional loan commitment of up to $5 billion to support nuclear uprates and modernization at selected plants in Illinois, Maryland and Pennsylvania. DOE said the work could add nearly 1.1 gigawatts of generation across the PJM and MISO regions.
The October 27 commitment covers potential work at Braidwood, Byron, Clinton, Dresden, LaSalle and Quad Cities in Illinois, Calvert Cliffs in Maryland and Limerick in Pennsylvania. DOE said the planned investments could support more than 10,000 project-related jobs. Constellation separately said recent long-term agreements with Google and Amazon already underpin more than $7 billion of private investment and roughly 1,080 megawatts of planned nuclear capacity.
The federal amount is not a grant, an awarded construction contract or a total project budget. It is a conditional loan commitment from DOE’s Office of Energy Dominance Financing. Constellation must complete due diligence, negotiate definitive financing documents and satisfy technical, legal, environmental and financial conditions before DOE can fund the loan. The company also cautioned that the commitment is not a final decision to proceed with every potential uprate.
What comes next
No deadline was announced for definitive financing or individual project approvals. Constellation said it would continue work with DOE, customers, regulators and local stakeholders if the commitment is finalized. No open solicitation, bid package or contractor award was identified in either primary announcement.
For infrastructure firms, the commercial signal is a possible multi-site pipeline of nuclear engineering, outage planning, turbine and plant-modernization work. Timing and addressable packages remain unverified until Constellation makes plant-level decisions and releases procurement information.
Primary sources: U.S. Department of Energy, October 27, 2026; Constellation Energy, October 27, 2026.
What happens next
Constellation must complete due diligence, negotiate definitive financing documents and satisfy applicable conditions before DOE can fund the loan. Neither DOE nor Constellation announced a completion date.
Source for this milestone →Why it matters for the industry
If finalized and individual uprates proceed, the financing could accelerate multi-site nuclear modernization and related engineering, outage and equipment work. The announcement does not identify bid packages, contractors or an open procurement.
Supporting source →Explore the project and participants
Existing Directory record for the borrower and nuclear-fleet owner identified in both primary sources.
Existing Infraday Capital record for the DOE office issuing the conditional loan commitment.
Sources & reporting
- U.S. Department of Energy announcement · October 27, 2026
- Constellation Energy announcement · October 27, 2026
Sources checked 2026-10-28.