Extracting efficiency

Extended operating cycles, uprates, and license renewals are not glamorous, but they are effective. If approached strategically, they represent a meaningful capacity wedge. Estimates suggest we could unlock something on the order of 8–10 gigawatts of additional generation over the next decade. That is the equivalent of several new large reactors—without the long lead times and capital risk.

While moderating ANS’s recent “Path to Criticality” webinar—which featured several developers aiming to bring prototype reactors on line this year (some as early as America’s 250th birthday on July 4)—I was struck by how the competitive landscape of new nuclear is evolving. The race for a nuclear resurgence is shaping up to be a contest between the “bigs” and the “smalls.”

Large reactors derive their advantage from scale: mature supply chains, regulatory familiarity, and the ability to deliver high output with strong operating efficiency over long lifetimes—albeit with significant upfront capital requirements and long replication timelines.

Smaller and advanced reactors, by contrast, are not designed to compete on thermodynamic or economic efficiency at the unit level. Their advantage lies in economies of production. Standardization, modular fabrication, and repeatable deployment all create a pathway to faster learning curves and more rapid “nth-of-a-kind” cost reductions. While this model offers the prospect of speed and flexibility, it still must demonstrate durable economics and achieve sufficient market adoption to realize those production-based gains.

Many people in the nuclear community have their own “theory of the case” in the big-versus-small debate. Ultimately, however, the question is not which side will win but how we will position ourselves to succeed with both—while not losing sight of the opportunities sitting right in front of us to preserve, extend, and incrementally expand the existing fleet.