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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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ANS joins others in seeking to discuss SNF/HLW impasse
The American Nuclear Society joined seven other organizations to send a letter to Energy Secretary Christopher Wright on July 8, asking to meet with him to discuss “the restoration of a highly functioning program to meet DOE’s legal responsibility to manage and dispose of the nation’s commercial and legacy defense spent nuclear fuel (SNF) and high-level radioactive waste (HLW).”
D. V. Altiparmakov, Dj. Tomašević
Nuclear Science and Engineering | Volume 105 | Number 3 | July 1990 | Pages 256-270
Technical Paper | doi.org/10.13182/NSE90-A19190
Articles are hosted by Taylor and Francis Online.
A higher order nodal diffusion method is formulated, based on variational principle, Kantorovich’s variational method, and the patch test. In this framework, the relationship between finite element and nodal methods is discussed and the differences are pointed out. General, transverse integrated quasi-one-dimensional nodal equations are derived and matrix representation is given. In addition, a comparison with a similar approach is shown. A numerical solution is carried out using polynomial expansion of the source term and the corresponding analytic solution in alternating directions. Calculations of two-dimensional International Atomic Energy Agency and Biblis benchmark problems are performed and compared with results from the literature. It is shown that the first-order approximation yields the same order of accuracy as the standard nodal methods with quadratic leakage approximation, while the second-order approximation is considerably better.