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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
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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Latest News
Take steps on SNF and HLW disposal
Matt Bowen
With a new administration and Congress, it is time once again to ponder what will happen—if anything—on U.S. spent nuclear fuel and high-level waste management policy over the next few years. One element of the forthcoming discussion seems clear: The executive and legislative branches are eager to talk about recycling commercial SNF. Whatever the merits of doing so, it does not obviate the need for one or more facilities for disposal of remaining long-lived radionuclides. For that reason, making progress on U.S. disposal capabilities remains urgent, lest the associated radionuclide inventories simply be left for future generations to deal with.
In March, Rick Perry, who was secretary of energy during President Trump’s first administration, observed that during his tenure at the Department of Energy it became clear to him that any plan to move SNF “required some practical consent of the receiving state and local community.”1
William V. Macnabb
Nuclear Technology | Volume 49 | Number 3 | August 1980 | Pages 435-442
Technical Paper | Fuel Cycle | doi.org/10.13182/NT80-A17691
Articles are hosted by Taylor and Francis Online.
A comparison has been made between a modest increase in fuel discharge burnup and repetitive end-of-cycle coastdowns as two near-term alternatives that may be used to improve utilization of resources for a pressurized water reactor on the once-through cycle. Four cases have been considered. The cases include two different burnup levels—present technology of 33 000 MWd/MTU and a 3000 MWd/MTU increase in design burnup to 36 000 MWd/MTU. At each burnup value a fuel cycle without coastdown and one with coastdown every cycle have been evaluated. For each of the four cases, computations have been made of uranium requirements, separative work requirements, and m/kWh(electric) costs. The analyses show that the improvements in resource utilization with end-of-cycle coastdown are modest (<2%). There may be little or no economic benefits. The gains from increased discharge burnup are primarily a reduced fuel cycle cost. Since individual utilities may not see benefits in uranium or separative work savings per se that do not also include dollar savings, implementation of coastdown on a nationwide basis may be difficult.