Pre-defined energy group structures

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The following pre-defined energy group structures are available to be used with the ene card. The group boundaries are listed in in the order of increasing lethargy.

All energy group structures listed here have also extended versions where the names have a suffix of _ext, for example nj19_ext. These energy group structures have upper and lower bounds of infinity and zero, respectively. When using these energy group structures, for example the group constants are tallied with all energies also used during the Serpent simulations.

Name Groups Description
default2 2 Default 2-group structure
defaultmg 70 Default multi-group structure
nj2 240 CSEWG 239 group structure
nj3 30 LANL 30 group structure
nj4 27 ANL 27 group structure
nj5 50 RRD 50 group structure
nj8 35 Laser-thermos 35 group structure
nj9 69 EPRI-CPM 69 group structure
nj11 70 LANL 70 group structure
nj14 100 Eurlib 100-group structure
nj16 174 Vitamin-e 174-group structure
nj17 175 Vitamin-j 175-group structure
nj18 172 XMAS 172-group structure
nj19 33 ECCO 33-group structure
nj20 1968 ECCO 1968-group structure
nj21 315 Tripoli 315-group structure
nj22 172 XMAS LWPC 172-group structure
nj23 175 VIT-J LWPC 175-group structure
wms69 69 WIMS 69-group structure
wms172 172 WIMS 172-group structure
cas70 70 CASMO 70-group structure
cas40 40 CASMO 40-group structure
cas25 25 CASMO 25-group structure
cas23 23 CASMO 23-group structure
cas18 18 CASMO 18-group structure
cas16 16 CASMO 16-group structure
cas14 14 CASMO 14-group structure
cas12 12 CASMO 12-group structure
cas9 9 CASMO 9-group structure
cas8 8 CASMO 8-group structure
cas7 7 CASMO 7-group structure
cas4 4 CASMO 4-group structure
cas3 3 CASMO 3-group structure
cas2 2 CASMO 2-group structure
mupo43 43 MUPO 43-group structure
scale44 44 SCALE 44-group structure
scale238 238 SCALE 238-group structure