%ITER Card
This card can be used to control the iterations in ADPRES calculation
| %ITER | Variable | Description | Remarks |
|---|---|---|---|
| LINE 1 | NOUT | Maximum number of outer iteration | Default = 500 |
| NIN | Maximum number of inner iteration per an outer iteration | Default = 2 | |
| SERC | Fission source error criteria (relative error) | Default = 1.e-5 | |
| FERC | Flux error criteria (relative error) | Default = 1.e-5 | |
| NAC | Outer iteration fission source extrapolation interval | Default = 5 | |
| NUPD | Nodal update interval through outer iteration | Default = (NX+NY+NZ)/2.5. Effective only for ANM and PNM nodal kernel | |
| TH_NITER | Maximum number of T-H iteration | Default = 30. Effective only if %THER present |
|
| NTH | Maximum number of outer iteration per T-H iteration | Default = 20. Effective only if %THER present |
Note: TH iteration is non-linear iteration to determine TH parameters
Example:
! Iteration control card
%ITER
! Set maximum number of outer iteration = 1200
! Set maximum number of inner iteration = 3
! Set fission source error criteria = 1.e-5
! Set flux error criteria = 1.e-5
! Set fission source extrapolation interval every 25 outer iterations
! Set nodal update interval every 40 outer iterations
! Set maximum number of TH iterations = 20
! Set maximum number outer iterations for each TH iteration is 80
1200 3 1.e-5 1.e-5 25 40 20 80