Input syntax manual
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Revision as of 17:36, 17 November 2015 by Jaakko Leppänen (Talk | contribs) (→set pop)
This page will contain the whole input syntax of Serpent 2
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mat (material definition)
surf (surface definition)
cell (cell definition)
det (detector definition)
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|
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.
- Using the pop card sets the mode to criticality source simulation. External source simulation is invoked using #set nfps.
- 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 <npg> [<keff0> <>]
Setting the neutron population.
- ^ Leppänen, J. "Development of a new Monte Carlo reactor physics code." D.Sc. Thesis, Helsinki University of Technology, 2007. (VTT Publications 640)