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Why It Matters
Idaho faces a fundamental energy challenge. The state historically exported power to neighboring regions, but demographic and economic growth is reversing that advantage. Bannock County officials and regional partners are now exploring small modular reactors as a potential solution to keep electricity reliable and affordable as demand climbs across Southeast Idaho over the next decade.
What Happened
Representatives from Idaho National Laboratory, Idaho Advanced Energy Consortium, Idaho State University, and the Portneuf Valley Development Corporation gathered in Downey on Wednesday to discuss small modular reactor (SMR) technology with county residents. The presentation outlined how compact nuclear units could address projected electricity shortages without requiring the massive footprint of conventional power sources.
The forum was built on strong local backing. A countywide survey that drew over 700 responses found that nearly 90 percent of respondents viewed nuclear energy favorably, signaling community openness to the technology.
The Technology and the Numbers
Small modular reactors represent a markedly different approach to nuclear power. A single SMR unit occupies roughly 50 acres—a fraction of the land footprint needed for comparable solar generation. For perspective, one local solar proposal encompasses as much as 4,000 acres of Bureau of Land Management land, making the space efficiency of SMRs a significant consideration for land-constrained regions.
The power output is substantial. Fuel pellets roughly half an inch in diameter are engineered to generate electricity equivalent to powering approximately 1,800 homes for 80 to 90 years. Conventional large reactors require fuel servicing every eight to nine months, whereas SMRs operate on longer cycles, reducing maintenance frequency and associated costs.
Construction economics also factor into the analysis. Small modular reactors cost approximately 60 cents per kilowatt-hour to build, compared with 40 cents for solar installations. The estimated cost to build a single SMR in Bannock County is roughly $54 million.
Proposed Sites and Local History
Two locations in Pocatello have been identified as potential reactor sites: the shuttered Hoku plant and Pocatello Regional Airport. A third option near Downey involves a 400-acre parcel situated at least half a mile from the nearest residence, positioned adjacent to Interstate 15 and Highway 40.
Idaho State University has operated a small research reactor on campus since the 1960s, producing 5 watts of power. That decades-long track record of safe nuclear research operations provides local precedent for the technology.
The Broader Context
Idaho’s energy landscape is shifting. The state currently consumes roughly 1.3 to 1.5 terawatts of power annually, but that demand is expected to increase substantially within the next 5 to 10 years—potentially requiring a 30 percent boost in generation capacity across the region. This surge reflects population growth, industrial expansion, and rising electricity needs tied to data centers and other energy-intensive sectors.
Jess Gehin, an associate laboratory director at Idaho National Laboratory, framed the opportunity in both strategic and economic terms. “Nuclear energy is a natural fit for Idaho because it builds on the state’s long history of leadership in clean, reliable energy and advanced nuclear innovation,” Gehin said. He added that deployment could generate “high-quality jobs, stronger partnerships with Idaho State University and local industry, new workforce opportunities, and long-term economic growth.”
Regulatory Pathway Ahead
The Idaho National Laboratory’s role is limited to testing reactor designs on behalf of the U.S. Department of Energy. Licensing and public deployment authority rests with the Nuclear Regulatory Commission, meaning any actual construction in Bannock County would require federal regulatory approval before breaking ground.
The forum signals that local officials and residents are serious about exploring the option, but the journey from concept to operational reactor will require sustained coordination with state and federal authorities, environmental reviews, and ongoing community input.
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