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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).”
Taewan Noh, Warren F. Miller, Jr.
Nuclear Science and Engineering | Volume 124 | Number 1 | September 1996 | Pages 18-30
Technical Paper | doi.org/10.13182/NSE96-A24221
Articles are hosted by Taylor and Francis Online.
Using the operator form of a synthetic acceleration, the P1 acceleration [diffusion synthetic acceleration (DSA)] and P2 acceleration schemes for one-dimensional slab and the P1 and simplified P2 acceleration schemes for two-dimensional x-y geometry are derived. The convergence rate of each scheme for a simple model problem is compared, and the result is generalized by performing a Fourier analysis. In the one-dimensional case, the new second-moment P2 acceleration outperforms an earlier third-moment P2 acceleration developed by Miller and Larsen. However, it is still less efficient than P1 acceleration. Similar results show that the P1 acceleration converges faster than the simplified P2 acceleration in two-dimensional x-y geometry. These results confirm that one cannot simply assume that replacement of the DSA method with a higher order operator will lead to a smaller spectral radius.