Efficient methods for time-absorption (. cap alpha. ) eigenvalue calculations
Technical Report
·
OSTI ID:6320223
The time-absorption eigenvalue calculation represents one of the options found in most discrete-ordinates transport codes. This report describes several methods developed at Los Alamos to improve the efficiency of this calculation. Two procedures, based on coarse mesh rebalance, to accelerate the ..cap alpha.. eigenvalue iterations are derived. Some simple modifications to the iteration convergence precisions and the iteration strategy reduce the number of unnecessary calculations in the early stages of the problem. A procedure prevent code failures on ..cap alpha.. searchs for subcritical systems is detailed. For the test problems examined, these methods resulted in convergence with one-fifth the number of iterations required for the standard eignevalue search procedure.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6320223
- Report Number(s):
- LA-9602-MS; ON: DE83009611
- Country of Publication:
- United States
- Language:
- English
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