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
Tuesday, June 18, 2024|3:15–5:00PM PDT|Palm B
Session Chair:
Dennis Henneke (GE)
Session Organizer:
Alternate Chair:
David S. Grabaskas
To access paper attachments, you must be logged in and registered for the meeting.
Register NowLog In
Integrating PRA into the Conceptual and Preliminary Design Phases of an Advanced Reactor Project
3:15–3:35PM PDT
Thomas Morgan (Enercon Services), Dennis Henneke (GE Hitachi), Jonathan Li (GE Hitachi), Raymond Dremel (GE Hitachi)
Paper
Some Special Topics for the SMR Emergency Planning
3:35–3:55PM PDT
Dan Serbanescu (Group of Risk Analyses GLERUNR), Petre Min (Group of Risk Analyses GLERUNR)
Presented by Dennis Henneke (GE Hitachi)
Aalo Atomics' High Level Licensing Strategy
3:55–4:15PM PDT
Asmaa S. Farag (NCSU), Amir Afzali (Aalo Atomics), Yasir Arafat (Aalo Atomics), Matt Loszak (Aalo Atomics), Arjun Earthperson (NCSU), Mihai A. Diaconeasa (NCSU)
Licensing Advanced Reactor Designs: Leveraging Operating History to Develop Creative Solutions in Addressing Future Focus Areas
4:15–4:35PM PDT
Qin Pan (Nuclear Regulatory Commission), Sunil D. Weerakkody (Nuclear Regulatory Commission)
Insights from Multi-Unit Level 1, 2 and 3 Probabilistic Risk Assessment Results for Light-Water Reactor Designs - What Can Be Extrapolated to Advanced Reactor Designs?
4:35–4:55PM PDT
Susan E. Cooper (US Nuclear Regulatory Commission), Erick Ball (US Nuclear Regulatory Commission), Trey Hathaway (US Nuclear Regulatory Commision), Keith Compton (US Nuclear Regulatory Commission), Selim Sancaktar (Retired), Alan Kuritzky (US Nuclear Regulatory Commission), Latonia Enos-Sylla (US Nuclear Regulatory Commission)
Presentation Slides (Visible to Attendees)