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Conference Spotlight
2026 Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Nov 2025
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Nuclear Science and Engineering
December 2025
Nuclear Technology
Fusion Science and Technology
November 2025
Latest News
Nuclear power’s new rule book: Managing uncertainty in efficiency, safety, and independence
The U.S. nuclear industry is standing at its most volatile regulatory moment yet—one that will shape the trajectory and the safety of the industry for decades to come. Recent judicial, legislative, and executive actions are rewriting the rules governing the licensing and regulation of nuclear power reactors. Although these changes are intended to promote and accelerate the deployment of new nuclear energy technologies, the collision of multiple legal shifts—occurring simultaneously and intersecting with profound technological uncertainties—is overwhelming the Nuclear Regulatory Commission and threatening to destabilize investor and industry expectations.
Technical Session|Reactor Design and Analysis
Monday, April 22, 2024|10:15AM–12:00PM PDT|Franciscan A
Session Chair:
Friederike Bostelmann
Alternate Chair:
Donny Hartanto
Session Organizer:
Brendan M. Kochunas
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Impact of Inspection Time on Pebble-Bed Reactor Operation
10:15–10:35AM PDT
Clément Vayron de la Moureyre (Univ. California, Berkeley), Yves Robert (Univ. California, Berkeley), Massimiliano Fratoni (Univ. California, Berkeley)
Presented by Ludovic Jantzen (Univ. California, Berkeley)
Paper
ZONER: A Discrete Element Method (DEM) Post-Processing Methodology for Pebble Bed Reactors Spectral Regions Generation
10:35–10:55AM PDT
G. Busco (Kairos Power), F. Vitullo (Kairos Power), M. Lee (Kairos Power), J. Herter (Kairos Power), N. Satvat (Kairos Power)
Impact of Coupled DEM and Hyper-Fidelity Depletion on Pebble Bed Burnup
10:55–11:15AM PDT
Yves Robert (ORNL), Ludovic Jantzen (Univ. California, Berkeley), Tatiana Siaraferas (Univ. California, Berkeley), Massimiliano Fratoni (Univ. California, Berkeley)
Multiphysics Pebble-Bed Reactor Run-In Simulation Using a High-Fidelity Neutronics--Thermal Hydraulics Framework
11:15–11:35AM PDT
R. Stewart (INL), J. Cavaluzzi (INL), P. Balestra (INL), G. Strydom (INL)
Preliminary Study on Multiphysics Transient Calculations for Pebble Bed Reactors Using High-Fidelity Depletion Data
11:35–11:55AM PDT
Tatiana Siaraferas (Univ. California, Berkeley), Ludovic V. Jantzen (Univ. California, Berkeley), Yves Robert (ORNL), Faisal A. Alseaidan (Univ. California, Berkeley), Massimiliano Fratoni (Univ. California, Berkeley)
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