As you probably know Serpent's default output file "_res.m" contains almost all the group constants necessary for performing steady state calculations with PARCS 3D deterministic reactor core simulator.
The only missing parameter is the so called "kappa-fission
" macro XS.
here "kappa" is "energy release per fission" and the unit in PARCS is [J/fission]
and "kappa-fission" is "kappa" times "fission macro XS".
As long as this parameter is not in the default output file, one needs to define a special detector as follows:
1. define energy grid. Here we are using ecco 33 group structure
2. define detector to score "integral flux"
3. define detector to score "kappa fission" macro XS
Code: Select all
dr -8 void
dt 3 flux
My suggestion to Jaakko and Serpent developers is to add "kappa-fission" macro XS to the default output file "_res.m" in version 1.1.19
or at least from version 2.0.0
One of the reasons is that it will essentially simplify the structure of the wrapper codes such as SerpentXS or S2P by removing the necessity to define detectors and analyze detector output files, which are dependent on detector names.
Furthermore, PARCS 3D reactor core simulator is "de facto" the major player among deterministic codes, approved by US NRC, used by almost everyone in nuclear and is default tool for coupling with TRACE code.
So let us respect "major players" and add the only missing "kappa-fission" for the sake of SERPENT-PARCS complete and "default" integration.