03:06 PM EST, 12/16/2025 (MT Newswires) -- Constellation Energy ( CEG ) said Tuesday the initial 20-year license renewal for its Clinton Clean Energy Center and 20-year subsequent license renewal for its Dresden Clean Energy Center, both in Illinois, have been approved by the Nuclear Regulatory Commission.

The approvals allow Clinton to operate through 2047 and the Dresden reactors to operate through 2049 and 2051, the company said.

Constellation said it is investing over $370 million to relicense the plants and install upgrades to increase efficiency and ensure safety and reliability.

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