F$sub 2$ TWO-GROUP NEUTRON DIFFUSION PROGRAM
The F/sub 2/ Two-Group Neutron Diffusion 704 Digital Computer Program No. 19 requires 8198 words of storage. Normal operation is with the program on production operator program (POP) tape. The program tape assignments are (1) system tape, (2) data input, (3) output, (4) POP and program library, and (5) and (6) temporary storage. This program solves one-dimensional, two-group diffusion equa tions as difference equations in multi-region plane, cylin- drical, or spherical geometry subject to two-group albedotype boundary conditions at the outer boundaries. Fission density is improved with each iteration until the selected convergence criterion is met. If an external source is provided, the eigenvalue, k, is omitted. Output consists of reactivity, k, after each iteration, and converged values of fission density and fluxes at each lattice point. An adjoint or a one-group calculation may be requested. Problem time in seconds with type used for input-output is 17.5 + 0.06 (number of compositions) + 0.07 (number of regions) + 0.88 (nunUber of iterations). The program accepts a maximum of 100 lattice intervals, 50 sets of two-group constants, and 50 regions. The number of iterations may not exceed 50. (auth)
- Research Organization:
- General Electric Co. Aircraft Nuclear Propulsion Dept., Cincinnati
- DOE Contract Number:
- AF33(600)-38062; AND AT(11-1)-171
- NSA Number:
- NSA-14-008822
- OSTI ID:
- 4188326
- Report Number(s):
- APEX-539
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-60
- Country of Publication:
- United States
- Language:
- English
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