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TerraPower Announces Start of Construction on First Utility-Scale Advanced Nuclear Plant in Wyoming

LCG, April 23, 2026--TerraPower announced today the official start of construction on its Kemmerer Unit 1 nuclear power plant, which could be the first utility-scale advanced nuclear power plant in the United States. In early March, the Nuclear Regulatory Commission (NRC) announced that it had authorized the staff to issue a construction permit for Unit 1 commercial nuclear power plant in Kemmerer, Wyoming.

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TVA Announces Two Energy Storage Agreements Totaling 425 MW/1,700 MWh

LCG, April 22, 2026--The Tennessee Valley Authority (TVA) yesterday announced two new, 20-year agreements for a 225 MW/900 MWh battery energy storage system (BESS) project in East Tennessee and for a 200 MW/800 MWh BESS project in northern Alabama. Both projects are planned to commence commercial operations in 2029.

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Industry News

World Record Goes to Sioux Plant

LCG, April 2, 2002-Ameren's 34-year-old Unit 2 of the Sioux plant broke the world record for continuous operation of a plant of its kind.

Located in St. Charles, Missouri, the cyclone-fired supercritical boiler unit made it to its 246th day of continuous operation yesterday and then went off-line for maintenance. The next best record, that of a Tennessee Valley Authority unit, is 194 days.

Sioux's Unit 2, located on the Mississippi River some 28 miles from St. Louis, can consume petroleum coke, coal and tire chips, and has generated 5,960,000 megawatt-hours over its lifetime.

Ameren serves 1.5 million customers in Illinois and Mississippi.

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