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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Powering the future: How the DOE is fueling nuclear fuel cycle research and development
As global interest in nuclear energy surges, the United States must remain at the forefront of research and development to ensure national energy security, advance nuclear technologies, and promote international cooperation on safety and nonproliferation. A crucial step in achieving this is analyzing how funding and resources are allocated to better understand how to direct future research and development. The Department of Energy has spearheaded this effort by funding hundreds of research projects across the country through the Nuclear Energy University Program (NEUP). This initiative has empowered dozens of universities to collaborate toward a nuclear-friendly future.
Clifton R. Drumm, John C. Lee
Nuclear Science and Engineering | Volume 96 | Number 1 | May 1987 | Pages 17-29
Technical Paper | doi.org/10.13182/NSE87-1
Articles are hosted by Taylor and Francis Online.
The optimal axial distribution of gadolinium burnable poison in a pressurized water reactor is determined to yield an improved power distribution. The optimization scheme is based on Pontrya-gin’s maximum principle, with the objective function accounting for a target power distribution. The conjugate gradients optimization method is used to solve the resulting Euler-Lagrange equations iteratively, efficiently handling the high degree of nonlinearity of the problem. For the one-group, onedimensional axial core model considered, the optimal distribution of the number of burnable poison pins and gadolinium concentration yields an improved power distribution. For ten axial zones of gadolinium, the maximum power peaking factor for the cycle is reduced from 1.41 for uniform gadolinium to 1.23 for the optimal gadolinium loading, a decrease of 12.8%. The axial offset band is reduced from -12.0 to 6.5% for uniform gadolinium to -4.4 to 1.0% for the optimal gadolinium loading.