Amazon has entered into a power agreement that supports more than $3 billion in upgrades at Constellation’s Calvert Cliffs nuclear plant, according to Engineering News-Record.

The work centers on Constellation’s 1.79-gigawatt facility at Calvert Cliffs. The plant’s electricity will continue flowing to the regional PJM Interconnection grid during the upgrade program.

ENR reported the deal on Oct. 1, 2026, describing it as backing a major improvement effort at the plant. The source did not provide additional project details in the excerpt supplied.

The arrangement links a large corporate power buyer with a nuclear plant operator and a regional transmission market already receiving the plant’s output. No further schedule, scope, or construction breakdown was included in the source material.

The report was published by Engineering News-Record.

aecValueAdd":"A large power agreement tied to a running nuclear plant signals that major improvement work can be financed without stopping generation. For AEC firms, the key fact is that the upgrade is happening at an active 1.79-GW facility tied into PJM, which points to work in a tightly controlled operational setting.","staffingCapacityNote":null,"imageAlt":"Calvert Cliffs nuclear plant associated with Amazon-backed upgrade financing."}】【。json