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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

Toshiba Signs EPC Contract for New Nuclear Reactors in Texas

LCG, February 26, 2009--Toshiba Corp. announced yesterday that it signed an engineering, procurement and construction (EPC) agreement for the addition of two nuclear units at the South Texas Project (STP), located about 90 miles southwest of Houston. The new units are scheduled to commence operations in 2016 and 2017.

The electric generating capacity of each new unit will be approximately 1,360 MW. The existing two units are pressurized water reactors, each with a capacity of 1,312 MW. The site and cooling reservoir were originally designed for four units, and the plans are for the new units to be built adjacent to the existing two units. South Texas Project Nuclear Operating Company (STPNOC), which currently operates units 1 and 2, will operate the new units.

A subsidiary of Toshiba, Toshiba America Nuclear Energy Corp., executed the EPC agreement with STPNOC, which will be responsible for management of the overall project. STPNOC acted as the agent for CPS Energy and Nuclear Innovation North America LLC (Nina), which was created in 2008 as an Advanced Boiling Water Reactor (ABWR) nuclear development company and is jointly owned by NRG Energy (NRG) and Toshiba. NRG owns 44 percent of STP, and CPS Energy and Austin Energy own 40 percent and 16 percent, respectively.

In November 2007, the Nuclear Regulatory Commission (NRC) accepted for review the Combined Construction and Operating License (COL) Application submitted by NRG and STPNOC to construct and operate two nuclear reactors at the South Texas Project. The submittal employs the ABWR design, which was certified for use by the NRC in 1997.

Nina now plans to use the certified design, with some modifications to enhance safety and construction schedules, and to submit a revision to the original COL application. NRG stated that "the modest delay in licensing that is expected as a result of these revisions will be outweighed by the advantages the changes create in price and schedule certainty."
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