Coarse mesh finite difference acceleration in the two-dimensional discrete ordinates transport calculation
Conference
·
OSTI ID:22039770
- Purdue Univ., School of Nuclear Engineering, West Lafayette, IN 47907-1290 (United States)
- Oak Ridge National Laboratory, Nuclear Science and Technology Div., Oak Ridge, TN 37831-6370 (United States)
The coarse mesh finite difference (CMFD) formulation is applied to the heterogeneous whole transport calculation as a means of efficient acceleration as well as simplified representation. The CMFD formulation enables dynamic homogenization of the cells during the iterative solution process such that the heterogeneous transport solution can be preserved. Dynamic group condensation is also possible with a two-level CMFD formulation involving alternate multi-group and two group calculations. The two-dimensional discrete ordinates (SN) method is used as the kernel to generate the heterogeneous solution and the CMFD solution provides the SN kernel with much faster converged fission and scattering source distributions. Through the applications to various problems including different compositions, sizes, and energy groups, it is shown that the performance of the CMFD formulation is superior in that the number of the SN Transport sweeps can be reduced to about 10 while reproducing exactly the original transport solution. (authors)
- Research Organization:
- American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
- OSTI ID:
- 22039770
- Country of Publication:
- United States
- Language:
- English
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