Constellation and Walmart on June 23 announced a long-term nuclear power purchase agreement for electricity from Constellation's Dresden Clean Energy Center in Illinois. The agreement includes approximately 176 MW of wholesale supply, including 30 MW of expanded generating capacity.
Walmart will purchase energy, environmental attributes and capacity through two 15‑year terms beginning in 2029 and 2030.
"This agreement supports reliable nuclear energy in the region and enables planned uprates -- efficiency upgrades that increase output from existing nuclear units without the need to build a new facility. The agreement is expected to help Walmart access cleaner energy and strengthen local energy infrastructure -- while continuing to serve customers with everyday low prices," the companies said.
Through uprates at the Dresden Clean Energy Center, the agreement will provide enough new power to the grid to support Walmart's previously announced high-tech perishable distribution center, currently in development in Belvidere, Illinois, they said.
The agreement marks Walmart's first nuclear PPA and is among the first of its kind between a large retailer and a nuclear energy facility in the United States.
The agreement follows Constellation's December 2025 license renewal announcement for Dresden and supports continued investment in Dresden's long‑term reliability and performance, a news release said.,
The Dresden Clean Energy Center is licensed to operate through 2049 and 2051.
