REVISED ITERATION SEQUENCE IN PROGRAM F-N
The iteration sequence used in the multigroup Program F-N (ANP No. 308) in which one energy lattice sweep, a so-called inner iteration, is performed for each space power distribution sweep, an outer iteration, exhibited a painfully slow convergence rate in the presence of significant "up-scattering" even for the typical ANP reactor where the dominance ratio between fundamental and first harmonic space modes is about five. A revised iteration sequence in which the energy lattice sweep is iterated to a desired convergence before repeating the power iteration is outlined. The revised procedure should significantiy reduce the machine time required for this type of problem. (auth)
- Research Organization:
- General Electric Co. Aircraft Nuclear Propulsion Dept., Cincinnati
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AT(11-1)-171
- NSA Number:
- NSA-15-018416
- OSTI ID:
- 4009983
- Report Number(s):
- TID-12740; XDC-61-2-131
- Country of Publication:
- United States
- Language:
- English
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