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 Nuclear Energy Conference & Expo (NECX)
August 24–27, 2026
Dallas, TX|Hilton Anatole
Latest Magazine Issues
Jun 2026
Jan 2026
2026
Latest Journal Issues
Nuclear Science and Engineering
July 2026
Nuclear Technology
Fusion Science and Technology
Latest News
Valar’s Ward 250 reaches criticality in Utah
El Segundo, Calif.–based start-up Valar Atomics has taken its Ward 250 test reactor critical at the Utah San Rafael Energy Lab (USREL), becoming the second company in the Department of Energy's Reactor Pilot Program to reach the milestone, and, according to the DOE, the first to do so outside a national laboratory.
The DOE celebrated the achievement in a June 18 announcement, describing it as a "zero-power fueled criticality demonstration." The news follows a similar update for Antares Nuclear's Mark-0 reactor, which the DOE said achieved criticality at Idaho National Laboratory earlier this month.
Advanced Reactor Safety (ARS)
Technical Session
Wednesday, June 19, 2024|1:00–2:45PM PDT|Palm A
Session Chair:
Koroush Shirvan (MIT)
Session Organizer:
Alternate Chair:
David S. Grabaskas
To access paper attachments, you must be logged in and registered for the meeting.
Register NowLog In
Mechanical Aerosol Generation from Two-Phase Flow Pipe Breaks for Low Pressure FHR
1:00–1:20PM PDT
Kyoung M. Kang (Kairos Power), Quan Zhou (Kairos Power), Matthew Denman (Kairos Power), Timothy Drzewiecki (Kairos Power)
Paper
An Examination of Sodium Aerosol Behavior Based on Available Experimental Data
1:20–1:40PM PDT
Tyler Starkus (ANL), Dave Grabaskas (ANL), Dong Hoon Kam (ANL), Shayan Shahbazi (ANL)
Modeling Radionuclide Inventories in MSR Off-Gas Systems with Radiochemical Transport Analysis
1:40–2:00PM PDT
Shayan Shahbazi (ANL), Samuel Walker (INL), Mauricio Tano (INL), Tingzhou Fei (ANL), Yan Cao (ANL), David Grabaskas (ANL)
Implementation of the Sourdough Fuel Cycle and Waste Management Strategy in the EIRENE Novel Molten Salt Reactor Design
2:00–2:20PM PDT
C. Erika Moss (Univ. Tennessee, Knoxville), Ondrej Chvala (Univ. Tennessee, Knoxville), Donny Hartanto (ORNL), John P. Carter (INL)
Advancements in Depletion Modeling for Molten Salt Reactors Using OpenMC: A Case Study with the MSRE
2:20–2:40PM PDT
Lorenzo Chierici (Copenhagen Atomics), Erik Bergbäck Knudsen (Copenhagen Atomics)
Presented by Aslak Stubsgaard (Copenhagen Atomics)
Presentation Slides (Visible to Attendees) — Advancments in Depletion Modeling for Molten Salt Reactors using OpenMC: A Case Study with the MSRE