Abstract
The variational nodal transport method is generalized for the effective treatment of multi-group criticality problems in two and three dimensions. A symbolic manipulation procedure is developed to achieve the fully automated generation of nodal response matrices in three-dimensional and non-Cartesian geometries. A red-black partitioned matrix algorithm for accelerating the solutions of the resulting within-group equations is presented, and its efficacy demonstrated. The methods are implemented as an option of the Argonne National Laboratory code DIF3D and applied to a series of five benchmark problems in x-y-z and hexagonal-z geometries. For reactors with large transport effects, the variational P3 calculations agree with accurate Monte Carlo eigenvalues to within a few hundredths to a few tenths of a percent while requiring Cray X-MP computing times ranging from tens to hundreds of seconds.
Original language | English (US) |
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Pages (from-to) | 168-179 |
Number of pages | 12 |
Journal | Nuclear Science and Engineering |
Volume | 111 |
Issue number | 2 |
DOIs | |
State | Published - Jan 1 1992 |
ASJC Scopus subject areas
- Nuclear Energy and Engineering