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SPP and Member Utilities Successfully Achieve Western Expansion Milestone

LCG, April 2, 2026--Southwest Power Pool (SPP) today announced that the expansion of its service territory into the Western Interconnection has been a success. The milestone makes SPP the first regional transmission organization (RTO) with services spanning the Eastern and Western Interconnections. Its member organizations, which cover all or part of 17 states, can now benefit from a more operationally and geographically diverse integrated system.

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Holtec Achieves Milestone towards Restarting Palisades Nuclear Facility and Advances Plans to Build Two SMRs at Palisades Site

LCG, March 31, 2026--Holtec International yesterday announced that it successfully completed a milestone test necessary to return Holtec's Palisades Nuclear Generating Station to service. The 805-MW pressurized water reactor (PWR) is located in Michigan and was shut down by Entergy in May 2022. Holtec acquired the facility in June 2022 and has pursued a path to return the plant to service.

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Industry News

Lake Michigan Silt Closes AEP's Cook Nuke

LCG, Aug. 30, 2001--American Electric power Co. said this morning that the 1,100 megawatt Unit 2 of its Cook nuclear power plant at Benton Harbor, Mich., was being taken off line because of the intrusion of Lake Michigan silt into its cooling water systems.

"The silt was drawn in by plant water intake pipes and degraded cooling water systems required for plant safety equipment and back-up power sources," AEP said in a statement.

Silty water is a fine abrasive and can literally grind down the moving parts of a system in which it circulates. AEP said Unit 1 at Cook, a twin of Unit 2, was taken off line on Monday to replace a circulating water pump discharge valve. The company did not say silt was what made the replacement necessary but did say that silt intrusion affects the cooling water systems for both units.

Three huge pipes, each 16 feet across, bring water from one-half mile out in Lake Michigan into the plant. It is not surprising that silt -- and an occasional boat -- would find its way into the plant's systems.

AEP was unable to say how long the units would be shut down, but said return-to-service schedules for both units will be established following an investigation to determine the cause of the silt intrusion.

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