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NuScale Power Achieves Standard Design Approval from NRC for 77 MW SMR

LCG, May 30, 2025--NuScale Power Corporation (NuScale), a leading provider of advanced small modular reactor (SMR) nuclear technology, yesterday announced that it has received design approval from the U.S. Nuclear Regulatory Commission (NRC) for its uprated 77 MW power modules. NuScale states that it remains the only SMR technology company with design approval from the NRC, and the company remains on track for deployment by 2030, with 50- and 77-MW SMR options.

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EIA Presents Analysis of California's Solar and Wind Power Curtailment Challenges

LCG, May 29, 2025--The U.S. Energy Information Administration (EIA) released an analysis yesterday showing that the California Independent System Operator (CAISO), the grid operator for most of the state, is increasing its curtailment of the rapidly growing solar- and wind-powered generation facilities in order to balance electricity supply and demand, which is necessary to maintain a stable electric system.

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Industry News

Mitsubishi Joins South Africa PBMR Nuclear Project

LCG, Aug. 20, 2001--Mitsubishi Heavy Industries Ltd. has announced that it will participate in the development of a 100 megawatt high-temperature gas reactor that is under design by Pebble Bed Modular Reactor Pty. Ltd. of South Africa, Asia Pulse reported this morning.

Mitsubishi thus joins Exelon Corp. of the U.S. and possibly Electricit de France in seeing a future for the small, modular nuclear reactor being developed by the South African utility Eskom, parent company for PBMR Ltd.

The pebble bed modular reactor is a nuclear power plant that uses coated uranium particlesencased in graphite to form a fuel sphere that is two and one-third inches in diameter and safe to handle. In addition, the design uses helium as the coolant and energy transfer medium to a closed cycle gas turbine and generator.

The design differs in a number of ways from conventional pressurized water reactors which most of those in the U.S. are. These design differences, according to backers, result in the reactor being an inherently safe and economical power plant.

Another virtue is the design's modularity. Units of 100 megawatts each can be combined to provide a power plant of nearly any total capacity desired.

Mitsubishi Heavy said it will examine the technical and commercial viability of turbine generators powered by helium heated inside the reactor, and will sign a formal contract shortly. The company will participate in PBMR Ltd.'s plans to begin building a prototype high-temperature gas reactor in March of next year, for completion by January 2007.

Exelon has asked the U.S. Nuclear Regulatory Commission to develop licensing standards for the pebble bed modular reactor and has indicated that it might seek such a license in about a year.

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