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Oklo and Siemens Energy Sign Agreement to Accelerate Power Conversion System for New SMR in Idaho

LCG, November 19, 2025--Oklo Inc. and Siemens Energy announced today that the parties have signed a binding contract for the design and delivery of the power conversion system for Oklo’s Aurora-INL (Idaho National Laboratory) nuclear small modular reactor (SMR). The agreement authorizes Siemens Energy to begin engineering and design work to expedite procurement of long-lead components and to initiate the manufacturing process for the power conversion system. Oklo’s expertise in advanced fission technology will be combined with Siemens Energy’s extensive industry experience with steam turbine and generator systems, with the ultimate goal of generating carbon-free, reliable electricity.

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NERC's New Winter Reliability Assessment Raises Concerns for Elevated Risk of Insufficient Supplies to Meet Demand in Extreme Operating Conditions

LCG, November 19, 2025--NERC yesterday released its 2025–2026 Winter Reliability Assessment (WRA), which concludes "much of North America is again at an elevated risk of having insufficient energy supplies to meet demand in extreme operating conditions." The WRA does state that resources are adequate for normal winter peak demand, but extended, wide-area cold snaps will be challenging.

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Industry News

Calpine Plans 900 Megawatt Wisconsin Plant

LCG, July 17, 2001Calpine Corp. said this morning it plans to build a 900 megawatt merchant power plant in central Wisconsin. The Sherry Energy Center will be located near the town of Arpin, in Wood County.

Calpine said it had it had entered into agreements to sell 225 megawatts of the plant's capacity and power to Wisconsin Electric Power Co. and another 141 megawatts of capacity and power to Wisconsin Public Service Co.

The new facility will serve both baseload and peaking needs. The plant will include a 600 megawatt combined-cycle unit with two combustion turbines and a steam turbine, and also have a 300 megawatt simple-cycle unit with four combustion turbines.

Under a 10-year deal with Wisconsin Electric, the utility will have dispatch rights for 225 megawatts of the combined-cycle plant's output and will manage the purchase and delivery of fuel used to generate power for its use. A similar 10-year arrangement with Wisconsin Public Service is for dispatch right to 141 megawatts from the peaking unit and fuel management for its generation.

Calpine said the balance of the plant's 900 megawatts will be sold into the Wisconsin wholesale power market.

Construction of the $470 million facility is expected to begin next spring with commercial operation of the simple-cycle portion schedule for a year later. The combined-cycle facility is penciled in for commercial operation in the second quarter of 2004.

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