MCNPX Visual Editor Version X_24J 
c     Created on: Friday, August 14, 2015 at 16:07                              
    1     0         -1 2 -3 4 -5 6  u=1 lat=1 imp:n=1   $ROW 1
            fill=0:2 0:0 0:2
      10 10 10  $ROW 1 
      10 10 10  $ROW 1 
      10 10 10  $ROW 1 
    2     0         -7  fill=1 imp:n=1  
    3   280      -1 -8  u=10 imp:n=1  
    4     0         8  u=10 imp:n=1  
   99     0         7  imp:n=0  

    1        px 10 
    2        px -10 
    3        py 10 
    4        py -10 
    5        pz 10 
    6        pz -10 
    7       rpp -10 50 -10 10 -10 50 
    8        so 8 

mode  n
m280  1001.70c      -0.111915  $Water   (density of 1 assumed)
      8016.70c      -0.888085 
sdef cel=d1 rad=d2                                                              
si1  L (3<1<2)                                                                  
sp1 1                                                                           
si2  8                                                                          
nps  10000                                                                      
f4:n 3