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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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Deep geologic repository progress—2025 Update
Editor's note: This article has was originally published in November 2023. It has been updated with new information as of June 2025.
Outside my office, there is a display case filled with rock samples from all over the world. It contains a disk of translucent, orange salt from the Waste Isolation Pilot Plant near Carlsbad, N.M.; a core of white-and-bronze gneiss from the site of the future deep geologic repository in Eurajoki, Finland; several angular chunks of fine-grained, gray claystone from the underground research laboratory at Bure, France; and a piece of coarse-grained granite from the underground research tunnel in Daejeon, South Korea.
Technical Session|Radioisotope Power Systems
Tuesday, May 7, 2024|10:00–11:40AM MDT|Sweeney A
Session Chair:
Nick R. Wozniak
Alternate Chairs:
Lauren Nelson (LANL)
Session Organizer:
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Modeling Novel Radioisotope Power System Designs
10:00–10:06AM MDT
Rebecca Hoffman (Univ. Dayton Research Institute)
Paper
Lessons Learned: Design of Novel Radioisotope Power Systems
10:06–10:12AM MDT
Matthew Johnson (Univ. Dayton Research Institute)
Attachment
Systems Engineering of Novel Radioisotope Power Systems
10:12–10:18AM MDT
Christopher Venturella (Univ. Dayton Research Institute)
The Validation Testing of Novel Radioisotope Power System Designs
10:18–10:24AM MDT
Kenton Sherick (Univ. Dayton Research Institute), Boyd Allen Tolson (Univ. Dayton Research Institute)
Managing Innovative Radioisotope Power System Design Projects
10:24–10:30AM MDT
Jackie Maddox (Univ. Dayton Research Institute), Chadwick Barklay (Univ. Dayton Research Institute)
Terrestrial Isotope Activation for Low-Cost Testing of Next Generation Space Radioisotope Power Systems
10:30–10:36AM MDT
Samuel Piper (Atomos Nuclear and Space Corp.), Lucas Beveridge (Atomos Nuclear and Space Corp.)
Harnessing Neptunium Spectral Features to Monitor Valence Change During 238Pu Processing
10:36–10:42AM MDT
Sara E. Gilson (ORNL), Luke R. Sadergaski (ORNL), Hunter B. Andrews (ORNL), Adam J. Parkison (ORNL)
Impurity Analysis Using Laser-Induced Breakdown Spectroscopy for the Plutonium-238 Supply Program
10:42–10:48AM MDT
Hunter B. Andrews (ORNL), Luke R. Sadergaski (ORNL)
Remote Analysis of Radiochemical Processing Streams with Optical Spectroscopy for the Plutonium-238 Supply Program
10:48–10:54AM MDT
Luke R. Sadergaski (ORNL), Hunter B. Andrews (ORNL), Sara Gilson (ORNL), Laetitia Delmau (ORNL), Tom Hylton (ORNL), Adam Parkison (ORNL)
Plutonium-238: Evolving Production Capabilities and Considerations
10:54–11:00AM MDT
Joe Hough (ORNL), Adam Parkison (ORNL), Joe McVeigh (ORNL), Kristian Myhre (ORNL)
Radiolysis Studies to Support the Storage of Americium Oxide Materials for Radioisotope Power Systems
11:00–11:06AM MDT
Rebecca Sanderson (National Nuclear Laboratory), Mark Sarsfield (National Nuclear Laboratory), Hannah Colledge (National Nuclear Laboratory), Christophe Fongarland (European Space Agency), Steph Barron (European Space Agency)
The New Concept for European Radioisotope Stirling Generator
11:06–11:12AM MDT
Mihails Scepanskis (Deep Space Energy), Janis Priede (Deep Space Energy), Raimonds Nikoluskins (Deep Space Energy)
Aerojet Rocketdyne Small Radioisotope Thermoelectric Generator Concept Utilizing SiGe Unicouples
11:12–11:18AM MDT
S. Hunter (Aerojet Rocketdyne), L. Gard (Aerojet Rocketdyne)
Plutonium-238 Supply Research, Development, and Demonstration Strategy and Achievements at Oak Ridge National Laboratory
11:18–11:24AM MDT
Kristian Myhre (ORNL), Adam Parkison (ORNL), Joe McVeigh (ORNL), Joe Hough (ORNL)
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