Difference between revisions of "Input syntax manual"
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=== set pop === | === set pop === | ||
| − | <nowiki>set pop <npg> [<keff0> <>] </nowiki> | + | <nowiki>set pop <npg> <ngen> <nskip> [ <keff0> <btch> ] </nowiki> |
| − | + | Sets parameters for simulated neutron population in criticality source mode. Input values: | |
{| | {| | ||
| <npg> | | <npg> | ||
| − | | | + | | number of neutrons per generation |
|- | |- | ||
| − | | < | + | | <ncyc> |
| − | | | + | | number of active generations |
| + | |- | ||
| + | | <nskip> | ||
| + | | number of inactive generations | ||
| + | |- | ||
| + | | <keff0> | ||
| + | | initial guess for k-eff | ||
| + | |- | ||
| + | | <btch> | ||
| + | | batching interval | ||
|} | |} | ||
| − | + | The simulation is first run for a number of inactive generations to allow the fission source to converge. This is followed by a number of active generations, during which the results are collected. The statistics are divided in batches, and by default each generation forms its own batch. | |
<strong>Notes:</strong> | <strong>Notes:</strong> | ||
| − | *Using pop card | + | *Using the pop card sets the mode to criticality source simulation. External source simulation is invoked using [[set nps]]. |
| + | *Convergence of fission source can be monitored using Shannon entropy (input parameters [[set his]] and [[set entr]]). | ||
| + | *See [[detailed description]] on the statistical effects of batching. | ||
=== set nps === | === set nps === | ||
Revision as of 17:30, 17 November 2015
Contents
Preface
This page will contain the whole input syntax of Serpent 2
This is a reference to one article [1]
This is another reference to the same article [1]
Input cards
mat (material definition)
surf (surface definition)
cell (cell definition)
det (detector definition)
src
Input options
set pop
set pop <npg> <ngen> <nskip> [ <keff0> <btch> ]
Sets parameters for simulated neutron population in criticality source mode. Input values:
| <npg> | number of neutrons per generation |
| <ncyc> | number of active generations |
| <nskip> | number of inactive generations |
| <keff0> | initial guess for k-eff |
| <btch> | batching interval |
The simulation is first run for a number of inactive generations to allow the fission source to converge. This is followed by a number of active generations, during which the results are collected. The statistics are divided in batches, and by default each generation forms its own batch.
Notes:
- Using the pop card sets the mode to criticality source simulation. External source simulation is invoked using set nps.
- Convergence of fission source can be monitored using Shannon entropy (input parameters set his and set entr).
- See detailed description on the statistical effects of batching.
set nps
set nps <npg> [<keff0> <>]
Setting the neutron population.
| <npg> | neutrons_per_generation |
| <nc> | neutrons |
set delnu
set roulette
References
- ^ Leppänen, J. "Development of a new Monte Carlo reactor physics code." D.Sc. Thesis, Helsinki University of Technology, 2007. (VTT Publications 640)
