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Nuclear Criticality Safety
NCSD provides communication among nuclear criticality safety professionals through the development of standards, the evolution of training methods and materials, the presentation of technical data and procedures, and the creation of specialty publications. In these ways, the division furthers the exchange of technical information on nuclear criticality safety with the ultimate goal of promoting the safe handling of fissionable materials outside reactors.
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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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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.
T.K. Mau, D.J. Hoffman, D.A. Ehst, The ARIES Team
Fusion Science and Technology | Volume 19 | Number 3 | May 1991 | Pages 882-888
Advanced Reactor | doi.org/10.13182/FST91-A29456
Articles are hosted by Taylor and Francis Online.
Fast waves launched from folded waveguides are proposed as the reference current drive scenario for the ARIES-I tokamak reactor. An RF power of 100 MW at 141 MHz is launched from above the plasma midplane on the outboard side to drive the required 3.3 MA seed current in the core. The entire coupler system is compact, consisting of two poloidally stacked 12-waveguide toroidal arrays with a directivity of >95% and a coupling efficiency of ∼97%. Recent waveguide experiments on RFTF confirmed the high power capability (∼40 MW/m2), and the better coupling and spectrum shaping properties than those of loops. A definitive demonstration experiment on a tokamak is needed.
