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Division Spotlight
Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
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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ANS designates Armour Research Foundation Reactor as Nuclear Historic Landmark
The American Nuclear Society presented the Illinois Institute of Technology with a plaque last week to officially designate the Armour Research Foundation Reactor a Nuclear Historic Landmark, following the Society’s decision to confer the status onto the reactor in September 2024.
Zhiwen Xu, Yasuyuki Otsuka, Pavel Hejzlar, Mujid S. Kazimi, Michael J. Driscoll
Nuclear Technology | Volume 160 | Number 1 | October 2007 | Pages 63-79
Technical Paper | Annular Fuel | doi.org/10.13182/NT07-A3884
Articles are hosted by Taylor and Francis Online.
Compared to the traditional solid fuel pin, annular fuel with internal as well as external coolant flow increases the cooling surface by ~50%, which allows a higher core power density. However, operating at high power density introduces challenges in the core physics design of burnable poison to suit the desired fuel cycle length. In this paper, both the fuel cycle length and the number of reload fresh fuel assemblies are assumed to remain the same as current industry practice (18-month cycle and three-batch fuel management), which in turn requires >5 wt% fuel enrichment for the 150% power core. Alternative fuel cycles are discussed. Pressurized water reactor cores with annular fuel are designed using the state-of-the-art Studsvik Scandpower core modeling package including CASMO-4, TABLES-3, and SIMULATE-3. Two power levels are considered for the core design based on annular fuel: 100 and 150% of the rated power. The reactivity feedback effects of the annular fuel are shown to be comparable to those of solid fuel. The 150% power core with annular fuel shows considerable resemblance to traditional high-energy cores.