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Division Spotlight
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
Meeting Spotlight
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver 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!
Latest Magazine Issues
Apr 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
May 2025
Nuclear Technology
Fusion Science and Technology
Latest News
TerraPower begins U.K. regulatory approval process
Seattle-based TerraPower signaled its interest this week in building its Natrium small modular reactor in the United Kingdom, the company announced.
TerraPower sent a letter to the U.K.’s Department for Energy Security and Net Zero, formally establishing its intention to enter the U.K. generic design assessment (GDA) process. This is TerraPower’s first step in deployment of its Natrium technology—a 345-MW sodium fast reactor coupled with a molten salt energy storage unit—on the international stage.
Technical Session|Panel|Radioisotope Power Systems
Tuesday, May 6, 2025|1:00–2:40PM CDT|Atlantis/Discovery/Columbia (Marriott)
Session Chair:
Clive Neal (Univ. Notre Dame)
Session Organizer:
Jake Matthews (Zeno Power)
Track Organizer:
Harold Gerrish (NASA Marshall Space Flight Center)
As the global space community advances its lunar exploration goals, a key technology shortfall remains: ensuring survival and sustained operation through the lunar night. The Civil Space Technologies Shortfall survey identified this challenge as vital, yet it's one we already solved during the Apollo missions with the use of Radioisotope Power Systems (RPS). Despite RPS's proven ability to support long-duration missions through harsh lunar conditions, current deployments are limited to marquee NASA missions like New Frontiers and Mars Sample Return, leaving Artemis without a dedicated solution. Meanwhile, other space agencies-ESA, ISRO, and China's CNSA-are integrating RPS into their lunar roadmaps. For the first time, commercial entities are stepping up to provide RPS solutions, bridging the gap to supplement government-built systems and expand their utilization in space. These commercial RPS options offer potential not only for government-led initiatives like Artemis but also for future lunar commercial operations. But procuring commercial RPS is a new paradigm for NASA, and NASA will need to determine how it will procure these commercial RPS to solve its top technology shortfall. This panel brings together key stakeholders from across NASA's programs to discuss the demand, pathways, and potential acquisition models for commercial RPS. Panelists will explore procurement methods through programs such as NASA's CLPS/PRISM, the RPS Program, and direct acquisition from NASA projects. Insights from the excellent slate of panelists will provide a comprehensive view of the evolving landscape for RPS in supporting sustained lunar exploration.
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