ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Explore membership for yourself or for your organization.
Conference Spotlight
2026 ANS Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
Latest Magazine Issues
May 2026
Jan 2026
2026
Latest Journal Issues
Nuclear Science and Engineering
June 2026
Nuclear Technology
Fusion Science and Technology
Latest News
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|Sponsored by THD
Wednesday, November 18, 2020|12:00–2:10PM EST
Session Chair:
Dillon R. Shaver
Alternate Chair:
Elia Merzari (Penn State)
Session Organizer:
Igor A. Bolotnov (NCSU)
Staff Producer:
Erica McGowan (American Nuclear Society)
To access the session recording, you must be logged in and registered for the meeting.
Register NowLog In
To access paper attachments, you must be logged in and registered for the meeting.
Verification of Transient Simulations Using the SAS4A/SASSYS-1 Coupled Channel Interface
Daniel O'Grady (Argonne National Laboratory), Guanheng Zhang (Argonne National Laboratory), Thomas H. Fanning (Argonne National Laboratory), Rui Hu (Argonne National Laboratory), Guojun Hu (Argonne National Laboratory), Thanh Q. Hua (Argonne National Laboratory), Acacia J. Brunett (Argonne National Laboratory)
Paper
Joint SAS4A/SASSYS-1 Development for Lead Cooled Fast Reactor Safety Analysis
Anton Moisseytsev (ANL), Thomas H. Fanning (ANL), Daniel O’Grady (ANL), Thanh Quoc Hua (ANL), Adrian M. Tentner (ANL), Aydin Karahan (ANL), Acacia J. Brunett (ANL), Tanju Sofu (ANL), Michael Epstein (Fauske & Associates, LLC), Sung Jin Lee (Fauske & Associates, LLC), Daniel L. Wise (Westinghouse Electric Co.), Paolo Ferroni (Westinghouse Electric Co.), Jun Liao (Westinghouse Electric Company)
Implementation of an Extended Reactor Vessel Heat Rejection Modeling Capability in SAS4A/SASSYS-1
Thomas H. Fanning (Argonne National Laboratory), Acacia J. Brunett (Argonne National Laboratory), Daniel O'Grady (Argonne National Laboratory)
NekRS: Massively parallel fluid flow simulations in reactor cores
Elia Merzari (Pennsylvania State University), Misun Min (Argonne National Laboratory), Yu-Hsiang Lan (Argonne National Laboratory), Stefan Kerkemeier (Argonne National Laboratory), Paul Fischer (University of Illinois)
Statistical Uncertainties of Passive Scalars in a Direct Numerical Simulation of Low-Prandtl Fluid Flow over a Backward Facing Step
Iztok Tiselj (Jožef Stefan Institute), Jure Oder (Jozef Stefan Institut)
To join the conversation, you must be logged in and registered for the meeting.
