c3625 01-25-2022 17:09:46 G5 R1 theory HWR fat 20 - Line 4
 191 1 -17 -500 u= 2 IMP:N=1  $ fuel cell
 102 2 -1 500 u = 2 IMP:N=1  $ moderator cell
 104 0 -502 u = 1   fill = 2  lat = 2  IMP:N=1  $ fuel + moderator cell
 106 0 -504 fill = 1  IMP:N=1 $  core
 108 2 -1 504 -506 IMP:N=1  $ reflector.
 110 0 506  IMP:N=0  $ outside.
            
 500 RCC 0 0 -899  0 0  1798  10 $ fuel rod, pitch = 56.1875
 502 HEX 0 0 -901  0 0  1802  28.09375  0 0  $ moderator for one fuel rod
 504 HEX 0 0 -900  0 0  1800  0  900.25  0  $ core hexagon
 506 HEX 0 0 -1000  0 0  2000  0  1000  0  $ exterior hexagon
            
m1    92235.83c .006058 92238.83c .993942 $ Umelt
m2   1002.60c .9975 1001.60c .0025 8016.60c .5 $ D2O
m41  92235.83c .006058  $ tally material  5  5571  5
m42  92238.83c .993942  $ tally material  8  5574  8
MT2   HWTR.01
kcode 10000 1  70   200 $ kcode line
E0   .000000625  .1  50
F4:N   191 T
F14:N   191 T
FM14   ( .006058 41 (-2) (-6))  ( .993942 42 (-2) (-6))  T
 T
sdef pos 0 0 0
mode n