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
Aug 2026
Jan 2026
2026
Latest Journal Issues
Nuclear Science and Engineering
September 2026
Nuclear Technology
Fusion Science and Technology
August 2026
Latest News
Oklo’s Isotope Test Reactor achieves criticality
Oklo’s Groves Isotope Test Reactor became the fifth Department of Energy–authorized reactor to achieve criticality under the agency’s authorization process, it was announced earlier today.
Criticality was reached at 9:19 p.m. (EDT) on Wednesday at the company’s Groves facility in Lockhart, Texas, according to the DOE.
Technical Session|Radioisotope Power Systems
Tuesday, May 6, 2025|1:00–2:40PM CDT|Salon EF (Marriott)
Session Chair:
Colleen Van Lear (NASA Glenn Research Center)
Track Organizer:
Harold Gerrish (NASA Marshall Space Flight Center)
To access paper attachments, you must be logged in and registered for the meeting.
Register NowLog In
Stirling Convertor Launch Vibration Modeling
1:00–1:25PM CDT
Brett N. Shapiro (Johns Hopkins Univ. APL), Dennis J. Duven (Johns Hopkins Univ. APL), Martin E. Fraeman (Johns Hopkins Univ. APL), David M. Reed (Johns Hopkins Univ. APL)
Paper
Development of System Identification Testing Method for Stirling Convertors
1:25–1:50PM CDT
Donguk Max Yang (NASA)
Efficient Computational Method for Three-Dimensional Thermally- and Electrically-Coupled Performance Prediction of GPHS-RTG
1:50–2:15PM CDT
Carter D. Gassler (Univ. Pittsburgh), Michael J. Durka (Univ. Pittsburgh), Natan P. Herzog (Univ. Pittsburgh), Matthew M. Barry (Univ. Pittsburgh)
Thermal/Fluidic Model of Heat and CO Transport in the Next-Generation RTG Under Storage Conditions
2:15–2:35PM CDT
Michael J. Durka (NASA Jet Propulsion Laboratory), Jean-Pierre Fleurial (NASA Jet Propulsion Laboratory)