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Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Nuclear Nonproliferation Policy
The mission of the Nuclear Nonproliferation Policy Division (NNPD) is to promote the peaceful use of nuclear technology while simultaneously preventing the diversion and misuse of nuclear material and technology through appropriate safeguards and security, and promotion of nuclear nonproliferation policies. To achieve this mission, the objectives of the NNPD are to: Promote policy that discourages the proliferation of nuclear technology and material to inappropriate entities. Provide information to ANS members, the technical community at large, opinion leaders, and decision makers to improve their understanding of nuclear nonproliferation issues. Become a recognized technical resource on nuclear nonproliferation, safeguards, and security issues. Serve as the integration and coordination body for nuclear nonproliferation activities for the ANS. Work cooperatively with other ANS divisions to achieve these objective nonproliferation policies.
Meeting Spotlight
2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott Downtown
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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Nuclear Science and Engineering
July 2025
Nuclear Technology
June 2025
Fusion Science and Technology
Latest News
High-temperature plumbing and advanced reactors
The use of nuclear fission power and its role in impacting climate change is hotly debated. Fission advocates argue that short-term solutions would involve the rapid deployment of Gen III+ nuclear reactors, like Vogtle-3 and -4, while long-term climate change impact would rely on the creation and implementation of Gen IV reactors, “inherently safe” reactors that use passive laws of physics and chemistry rather than active controls such as valves and pumps to operate safely. While Gen IV reactors vary in many ways, one thing unites nearly all of them: the use of exotic, high-temperature coolants. These fluids, like molten salts and liquid metals, can enable reactor engineers to design much safer nuclear reactors—ultimately because the boiling point of each fluid is extremely high. Fluids that remain liquid over large temperature ranges can provide good heat transfer through many demanding conditions, all with minimal pressurization. Although the most apparent use for these fluids is advanced fission power, they have the potential to be applied to other power generation sources such as fusion, thermal storage, solar, or high-temperature process heat.1–3
Technical Session
Tuesday, May 9, 2023|1:30–3:10PM MDT|Boise Room
Session Chair:
Chadwick D. Barklay
Alternate Chair:
Austen D. Fradeneck
Session Organizer:
Sebastian C. Corbisiero
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A Feasibility Study for the Early Deployment of an Americium-241 Fuelled Radioisotope Heater Unit
1:30–1:50PM MDT
Jacob White (National Nuclear Laboratory), Tim Tinsley (National Nuclear Laboratory), Richard Ambrosi (Univ. Leicester), Richard Smith (National Nuclear Laboratory), Rebecca Sanderson (National Nuclear Laboratory)
Paper
Avoiding Earth Launch of Radioactive Material: Concepts for In-Situ Fabrication of Radioisotope Power Generators for Cislunar Applications
1:50–2:10PM MDT
C.M. Lavelle (Johns Hopkins APL), R. Venkatasubramanian (Johns Hopkins APL), R. McNutt (Johns Hopkins APL), K. Iyer (Johns Hopkins APL), P. Ostdiek (Johns Hopkins APL), A. Darrin (Johns Hopkins APL)
Development, Testing and Power Performance Prediction Update for the Skutterudite-Based MMRTG
2:10–2:30PM MDT
T. Caillat (Jet Propulsion Laboratory), S. Pinkowski (Jet Propulsion Laboratory), I. Chi (Jet Propulsion Laboratory), K. Smith (Jet Propulsion Laboratory), J. Paik (Jet Propulsion Laboratory), R. Bennett (Teledyne Energy Systems), S. Keyser (Teledyne Energy Systems), A. Lane (Aerojet Rocketdyne), K. Wefers (Aerojet Rocketdyne)
Performance Test of a Small ETG in Low-Earth Orbit
2:30–2:50PM MDT
Jintae Hong (KAERI), Sunjin Kim (KAERI), Jong-Bum Kim (KAERI), Kwang-Jae Son (KAERI), Jin-Joo Kim (KAERI), Jin Kim (KAERI)
Advancements Towards 100% Form-Fit-and-Function and Manufacturing of GPHS Heritage-Like SiGe Unicouples with Materials Prepared by Spark Plasma Sintering
2:50–3:10PM MDT
Jonathan Pierce (Johns Hopkins APL), Richard Ung (Johns Hopkins APL), Jake Ballard (Johns Hopkins APL), Tim Holgate (Johns Hopkins APL), Priestly Shuler (Johns Hopkins APL), Mousumi Mitra (Univ. Virginia), Rasdip Singh (Soal Technologies), Meiyong Himmtann (Johns Hopkins APL), Cheryl Sturm (Johns Hopkins APL), Scott Misture (Alfred Univ.), Joseph Poon (Univ. Virginia), Timothy Erickson (Johns Hopkins APL), Paul Ostdiek (Johns Hopkins APL), Rama Venkatasubramanian (Johns Hopkins APL)
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