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Division Spotlight
Reactor Physics
The division's objectives are to promote the advancement of knowledge and understanding of the fundamental physical phenomena characterizing nuclear reactors and other nuclear systems. The division encourages research and disseminates information through meetings and publications. Areas of technical interest include nuclear data, particle interactions and transport, reactor and nuclear systems analysis, methods, design, validation and operating experience and standards. The Wigner Award heads the awards program.
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!
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May 2025
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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|Sponsored by RPD
Wednesday, November 16, 2022|10:00–11:45AM MST|Sonoran 8
Session Chair:
Yasir Arafat
Alternate Chair:
Abdalla Abou-Jaoude
Session Organizer:
The purpose of the DOE MARVEL project is to develop, in an accelerated timeline, a nuclear microreactor applications test bed at INL to perform research and development on various operational features of microreactors to ultimately prove and improve the integration of microreactors to end-user applications. Through the DOE Microreactor Program, the development of this nuclear testbed provides an opportunity to establish and exercise key capabilities that support future reactor demonstrations by (1) providing an early-stage platform for potential end users of microreactor systems, (2) deploying the first small-scale R&D reactor in ~50 years to support new capability development, (3) facilitating outreach activity with stakeholders interested in novel nuclear energy applications (e.g., hydrogen production, process heating, water purifications), and (4) investigating and addressing issues relating to fabrication, assembly, rapid installation, deployment, and operation of microreactors. The panel will share details of the MARVEL Technology with the scientific community on various technical topics, including neutronics, thermal hydraulics, reactivity control, safety basis
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MARVEL Test Microreactor Reference Design
10:00–10:20AM MST
Yasir Arafat (INL), Travis Lange (INL), Carlo Parisi (INL), Anthony Crawford (INL), Benjamin Baker (INL), Paul Plachinda (INL), James Parry (INL), Holly Trellue (LANL), Luke Andrew (Walsh Engineering Services), Kyle Francis (Walsh Engineering Services), Tarrin Fundeberg (Walsh Engineering Services)
Paper
MARVEL Core Design and Neutronic Characteristics
10:20–10:40AM MST
Travis Lange (INL), Adrian Wagner (INL), Carlo Parisi (INL), Yasir Arafat (INL)
Safety Design Strategy for the Microreactor Applications Research Validation and Evaluation (MARVEL) Project
10:40–11:00AM MST
Douglas Gerstner (INL), Yasir Arafat (INL), Jason Andrus (INL), James Parry (INL)
Mass Production of Microreactors: A Look at Potential Scenarios and Fabrication Facility Requirements
11:00–11:20AM MST
Chandrakanth Bolisetti (INL), Abdalla Abou-Jaoude (INL), Yasir Arafat (INL), Jason Christensen (INL), Alex Huning (ORNL), Andrew Foss (INL)
MARVEL Thermal-Hydraulics: Normal and Accidental Conditions
11:20–11:40AM MST
Carlo Parisi (INL), Y. Arafat (INL)
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