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Conference Spotlight
2026 ANS Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
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Getting back to yes: A local perspective on decommissioning, restart, and responsibility
For 45 years, Duane Arnold Energy Center operated in Linn County, Ia., near the town of Palo and just northwest of Cedar Rapids. The facility, owned by NextEra Energy, was the only nuclear power plant in the state.
In August 2020, a historic derecho swept across eastern Iowa with winds approaching 140 miles per hour. Damage to the plant’s cooling towers accelerated a shutdown that had already been planned, and the facility entered decommissioning soon after, with its fuel removed in October of that year. Iowa’s only nuclear plant had gone off line.
Today the national energy landscape looks very different than it did just six short years ago. Electricity demand is rising rapidly as data centers, artificial intelligence infrastructure, advanced manufacturing, and electrification expand across the country. Reliable, carbon-free baseload power has become increasingly valuable. In that context, Linn County has approved the rezoning necessary to support the recommissioning and restart of Duane Arnold and is actively supporting NextEra’s efforts to secure the remaining state and federal approvals.
Technical Session|Thermal Hydraulics
Saturday, April 18, 2026|10:45–11:45AM CDT|RUDR 410
Session Chair:
Valerie Tsvetkova
Alternate Chair:
Zach Lassater
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Investigation of Reynolds Number Impact on Twisted Tape Inserts using Large Eddy Simulations
10:45–11:05AM CDT
Gavin Standish (Virginia Commonwealth Univ.), Sierra Tutwiler (Virginia Commonwealth Univ.), Lane B. Carasik (Virginia Commonwealth Univ.)
Paper
Uncertainty from Constant-fluid-properties Approximation in the Homogenous Equilibrium Model
11:05–11:25AM CDT
Sami M. AlZahrani (Ohio State), Taiyang Zhang (Ohio State)
Laminar to Turbulent Transition in Hexagonal Rod Bundles
11:25–11:45AM CDT
Dade R. George (Penn State), Luiz C. Aldeia Machado (Penn State), Carolina da Silva Bourdot Dutra (Penn State), Elia Merzari (Penn State)
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