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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).”
G. C. Pomraning
Nuclear Science and Engineering | Volume 69 | Number 1 | January 1979 | Pages 6-13
Technical Paper | doi.org/10.13182/NSE79-A21279
Articles are hosted by Taylor and Francis Online.
Analytic estimates are given for the angular dependence of the neutron (or photon) flux in toroidal geometry arising from the toroidal character of the configuration. The model used in the analysis is the one-group homogeneous diffusion model The toroidal angular effects in the local flux are shown to be first order in ϵ, the inverse aspect ratio, whereas angular effects occurring in spatial integrals of the flux are found to be of order ϵ2. An analytic expression for the Green's function for diffusion equation in toroidal geometry is given correct to order ϵ2, and typical numerical results are shown. A transformation of the scalar flux is presented that removes all angular dependence from the streaming term in the diffusion equation and removes the angular dependence from the absorption term correct to order ϵ. The overall conclusion reached is that angular toroidal effects are not simply characterized.