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
Jul 2026
Jan 2026
2026
Latest Journal Issues
Nuclear Science and Engineering
August 2026
Nuclear Technology
Fusion Science and Technology
Latest News
Aalo Atomics achieves criticality on July 4
Executive Order 14301 set an ambitious goal for at least three test reactors to achieve criticality by July 4. Two private companies participating in the Department of Energy’s Reactor Pilot Program—Antares and Valar Atomics—reached this stage earlier in June, and Deployable Energy—participating in the DOE's Nuclear Energy Launch Pad—became the third last week.
In the last few weeks, reports indicated that Aalo would be next, reaching criticality at Idaho National Laboratory with a low-enriched uranium–fueled, sodium-cooled reactor on or near the target date set forth by President Trump’s EO 14301. In the early hours of July 4, Aalo’s critical test reactor—a full-scale zero-power version of its planned 10-MWe Aalo-X—did just that, becoming the fourth DOE-authorized reactor to hit the milestone.
Technical Session|Water-Cooled Reactor Operations and Accident Analysis
Monday, August 21, 2023|3:30–5:10PM EDT|Columbia 3/4
Session Chair:
Hyun Sik Park (KAERI)
Alternate Chair:
Cesare Frepoli (FPolisolutions)
Session Organizer:
To access paper attachments, you must be logged in and registered for the meeting.
Register NowLog In
Boron Dilution Analysis in NuScale Using TRACE and TRACE/SCF Codes
3:30–3:50PM EDT
J. Sanchez-Torrijos (Univ. Politécnica de Madrid), C. Queral (Univ. Politécnica de Madrid)
Paper
Modeling of an Overcooling Transient Scenario in a CAREM-like Small Modular Reactor
3:50–4:10PM EDT
L. Mercatali (Karlsruhe Institute for Technology), V.H. Sanchez-Espinoza (Karlsruhe Institute for Technology), Hector Lestani (Comisión Nacional de Energía Atómica), Maximiliano Dalinger (Comisión Nacional de Energía Atómica)
Steam Line Break Analysis in NuScale SMR with the Coupled System Code ATHLET-DYN3D in the Framework of the EU H2020 McSAFER
4:10–4:30PM EDT
Eduard Diaz-Pescador (Helmholtz-Zentrum Dresden-Rossendorf), Matthias Jobst (Helmholtz-Zentrum Dresden-Rossendorf), Alexander Grahn (Helmholtz-Zentrum Dresden-Rossendorf), Sören Kliem (Helmholtz-Zentrum Dresden-Rossendorf)
Sensitivity Study of Compact and Long-Term-Operable Passive Residual Heat Removal System
4:30–4:50PM EDT
Wooseong Park (KAIST), Yong Hoon Jeong (KAIST), Yong Hwan Yoo (KAERI), Kyung Jun Kang (KAERI)
