c3643 01-25-2022 20:51:27 G5 R1 theory LWR thin - Line 1
 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  .4375 $ fuel rod, pitch = 1.5
 502 HEX 0 0 -901  0 0  1802  .75  0 0  $ moderator for one fuel rod
 504 HEX 0 0 -900  0 0  1800  0  899.625  0  $ core hexagon
 506 HEX 0 0 -1000  0 0  2000  0  1000  0  $ exterior hexagon
            
m1    92235.83c .008034 92238.83c .991966 $ Umelt 
m2   1001.60c .666667 8016.60c .333333 $ H2O 
m41  92235.83c .008034  $ tally material  5  5571  5
m42  92238.83c .991966  $ tally material  8  5574  8
kcode 10000 1  70   200 $ kcode line
E0   .000000625  .1  50
F4:N   191 T
F14:N   191 T
FM14   ( .008034 41 (-2) (-6))  ( .991966 42 (-2) (-6))  T
 T
sdef pos 0 0 0
mode n