Pre-defined energy group structures

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