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Division Spotlight
Fuel Cycle & Waste Management
Devoted to all aspects of the nuclear fuel cycle including waste management, worldwide. Division specific areas of interest and involvement include uranium conversion and enrichment; fuel fabrication, management (in-core and ex-core) and recycle; transportation; safeguards; high-level, low-level and mixed waste management and disposal; public policy and program management; decontamination and decommissioning environmental restoration; and excess weapons materials disposition.
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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Dragonfly, a Pu-fueled drone heading to Titan, gets key NASA approval
Curiosity landed on Mars sporting a radioisotope thermoelectric generator (RTG) in 2012, and a second NASA rover, Perseverance, landed in 2021. Both are still rolling across the red planet in the name of science. Another exploratory craft with a similar plutonium-238–fueled RTG but a very different mission—to fly between multiple test sites on Titan, Saturn’s largest moon—recently got one step closer to deployment.
On April 25, NASA and the Johns Hopkins University Applied Physics Laboratory (APL) announced that the Dragonfly mission to Saturn’s icy moon passed its critical design review. “Passing this mission milestone means that Dragonfly’s mission design, fabrication, integration, and test plans are all approved, and the mission can now turn its attention to the construction of the spacecraft itself,” according to NASA.
Masaaki Mori, Mitsuru Kawamura, Akio Yamamoto
Nuclear Technology | Volume 117 | Number 2 | February 1997 | Pages 171-183
Technical Paper | Nuclear Fuel Cycle | doi.org/10.13182/NT97-A35323
Articles are hosted by Taylor and Francis Online.
Results are presented of a conceptual design study of a transuranium (TRU) fuel assembly consisting of only plutonium and minor actinide (MA) oxides for transmutation of MAs in a pressurized water reactor (PWR). The average plutonium content of the TRU transmutation fuel assembly in this study is 38 wt% Putot, and the average MA content is 62 wt%. The fuel rod arrangement and the plutonium content are optimized to suppress the internal power peaking in the fuel assembly. Core characteristics and TRU inventory change are evaluated for an 870-MW(electric) PWR core loaded heterogeneously with a few TRU transmutation fuel assemblies. The maximum loading of the TRU transmutation fuel is limited to nine assemblies to maintain a negative moderator temperature coefficient at the beginning of cycle, while satisfying a cycle length of 15.2 GWd/tonne U. By loading nine TRU transmutation fuel assemblies, the total MA inventory in the core decreases by —65 kg/cycle, which is approximately equivalent to that produced from three UO2 reactors. The heterogeneous loading of a few fuel assemblies with highly concentrated TRU in a PWR is found to be feasible for the effective transmutation of MAs while maintaining reactor safety.
