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NRC Renews Operating Licenses for Constellation's Nuclear Reactors at Clinton and Dresden Facilities

LCG, December 16, 2025--The Nuclear Regulatory Commission (NRC) announced today that it has renewed the operating licenses of Constellation LLC’s Clinton Unit 1 in Clinton, Illinois, and Dresden Units 2 and 3, near Morris, Illinois, for an additional 20 years beyond the current expiration dates. The combined capacity of these three, Illinois-based nuclear units is 2,925 MW, and the operating license extension will enable the units to generate carbon-free power through about 2050.

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ERCOT Announces Organizational Changes to Promote Grid Reliability, Rapid Demand Growth, and Innovation

LCG, December 12, 2025--Today, the Electric Reliability Council of Texas, Inc. (ERCOT) announced strategic organizational changes designed to accelerate innovation, strengthen grid reliability, and support the unprecedented growth in the demand for electricity across Texas. To meet these objectives, ERCOT created two new organizations: Interconnection and Grid Analysis, and Enterprise Data and Artificial Intelligence (AI). The two organizations will formally launch in January 2026.

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Industry News

Fire During Restart Shuts San Onofre Nuke

LCG, Feb. 5, 2001The San Onofre Unit 3 nuclear power plant belonging to Southern California Edison Co. shut down automatically yesterday when a fire erupted in an electrical switching room.

The 1,120 megawatt reactor, which had just been restarted after completing a refueling outage begun January 2, was increasing power when the fire occurred. No radiation was emitted and no one was injured in the mishap, according to Ray Golden, a spokesman for the utility.

During the automatic shutdown called a "trip" all systems functioned properly. "Everything did exactly as it was designed to," Golden said.

The fire broke out 12 hours into the restart process, when the reactor was at about 40 percent of full power. Firefighters extinguished the blaze in about 30 minutes, Golden said, and the reactor itself was never endangered by the fire.

Investigations into the cause of the fire were continuing today and no estimate was available for how long repairs would take. Golden said the unit could be off-line for several weeks.

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