Revised Iteration Sequence in Program F-N

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Description

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 ... continued below

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9 p.

Creation Information

Fischer, P. G. February 1, 1961.

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Description

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)

Physical Description

9 p.

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  • Other Information: Orig. Receipt Date: 31-DEC-61

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  • Report No.: TID-12740
  • Report No.: XDC-61-2-131
  • Grant Number: AF 33(600)-38062
  • Grant Number: AT(11-1)-171
  • DOI: 10.2172/4009983 | External Link
  • Office of Scientific & Technical Information Report Number: 4009983
  • Archival Resource Key: ark:/67531/metadc871103

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Creation Date

  • February 1, 1961

Added to The UNT Digital Library

  • Sept. 16, 2016, 12:32 a.m.

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  • Oct. 11, 2017, 3:15 p.m.

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Fischer, P. G. Revised Iteration Sequence in Program F-N, report, February 1, 1961; United States. (digital.library.unt.edu/ark:/67531/metadc871103/: accessed May 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.