COMPUTER CODE HFN-MULTIGROUP, MULTIREGION NEUTRON DIFFUSION THEORY IN ONE SPACE DIMENSION
The computer program HFN uses numerical methods to solve the homogeneous or inhomogeneous one-spacedimensional multigroup diffusion equation for its lowest eigenvalue and the corresponding direct and/or adjoint eigenvectors, in both multiplying and non-multiplying systeras. Inhomogeneous boundary conditions combine with a flexible scatter-transfer matrix structure to permit HFN to solve a wide variety of problems, including some not directiy associated with neutron diffusion theory. Optional calculations use the results of the diffusion theory solutions to perform criticality searches, compute detector activation traverses, and compute integrals of interest in perturbation theory analyses. The theory is described and the operating instructions are listed along with a sample problem which took ten seconds on an IBM-7090. HFN is coded in FORTRAN (95%) and FAP for a 32 K IBM-7090. (auth)
- Research Organization:
- General Electric Co. Hanford Atomic Products Operation, Richland, Wash.
- DOE Contract Number:
- AT(45-1)-1350
- NSA Number:
- NSA-16-009132
- OSTI ID:
- 4815036
- Report Number(s):
- HW-71545
- Country of Publication:
- United States
- Language:
- English
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