View source for 2D 4-HEX super-cell lattice geometry

 <nowiki>
% --- 2D Simplified 4-HEX super-cell model-like EBR-II --------------------- %

set title "2D Simplified 4-HEX super-cell model-like EBR-II"

% ------------------------- PIN DEFINITION --------------------------------- %
% --- Fuel pin with central hole:

pin 1
void   0.07000
fuel1  0.38000
void   0.39000
clad   0.45500
cool   

pin 2
void   0.07000
fuel2  0.38000
void   0.39000
clad   0.45500
cool
 
pin 3
void   0.07000
fuel3  0.38000
void   0.39000
clad   0.45500
cool
 
pin 4
void   0.07000
fuel4  0.38000
void   0.39000
clad   0.45500
cool
 
pin 5
void   0.07000
fuel5  0.38000
void   0.39000
clad   0.45500
cool
 
pin 6
void   0.07000
fuel6  0.38000
void   0.39000
clad   0.45500
cool

pin 7
void   0.07000
fuel7  0.38000
void   0.39000
clad   0.45500
cool

% --- Central tube:

pin 8 
cool  0.44000
clad  0.51500
cool   

% --- Empty lattice position:

pin 9
cool   

% ------------------------- HEXAGONAL PART --------------------------------- %
% --- Lattice (type = 3, pin pitch = 1.23 cm) - hexagonal-baseline:

lat 10  3  0.0 0.0 15 15 1.23
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
 9 9 9 9 9 9 9 1 1 1 1 1 1 1 9
  9 9 9 9 9 9 1 1 1 1 1 1 1 1 9 
   9 9 9 9 9 1 1 1 1 1 1 1 1 1 9 
    9 9 9 9 1 1 1 1 1 1 1 1 1 1 9 
     9 9 9 1 1 1 1 1 1 1 1 1 1 1 9
      9 9 1 1 1 1 1 1 1 1 1 1 1 1 9
       9 1 1 1 1 1 1 8 1 1 1 1 1 1 9
        9 1 1 1 1 1 1 1 1 1 1 1 1 9 9
         9 1 1 1 1 1 1 1 1 1 1 1 9 9 9 
          9 1 1 1 1 1 1 1 1 1 1 9 9 9 9
           9 1 1 1 1 1 1 1 1 1 9 9 9 9 9
            9 1 1 1 1 1 1 1 1 9 9 9 9 9 9
             9 1 1 1 1 1 1 1 9 9 9 9 9 9 9
              9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 
			  
% --- Lattice (type = 3, pin pitch = 1.23 cm) - triangular-baseline:

lat 20  3  0.0 0.0 15 15 1.23
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
 9 9 9 9 9 9 9 1 7 7 7 7 7 1 9
  9 9 9 9 9 9 2 1 7 7 7 7 1 6 9 
   9 9 9 9 9 2 2 1 7 7 7 1 6 6 9 
    9 9 9 9 2 2 2 1 7 7 1 6 6 6 9 
     9 9 9 2 2 2 2 1 7 1 6 6 6 6 9
      9 9 2 2 2 2 2 1 1 6 6 6 6 6 9
       9 1 1 1 1 1 1 8 1 1 1 1 1 1 9
        9 3 3 3 3 3 1 1 5 5 5 5 5 9 9
         9 3 3 3 3 1 4 1 5 5 5 5 9 9 9
          9 3 3 3 1 4 4 1 5 5 5 9 9 9 9
           9 3 3 1 4 4 4 1 5 5 9 9 9 9 9
            9 3 1 4 4 4 4 1 5 9 9 9 9 9 9
             9 1 4 4 4 4 4 1 9 9 9 9 9 9 9
              9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 

% --- Lattice (type = 3, pin pitch = 1.23 cm) - empty:

lat 30  3  0.0 0.0 15 15 1.23
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
  9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
   9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
    9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
     9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
      9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
       9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
        9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
         9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 
          9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
           9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
            9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
             9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
              9 9 9 9 9 9 9 9 9 9 9 9 9 9 9

% --- Surfaces (assembly pitch = 14.7 cm):

surf  41  hexxc  0.0  0.0  7.100  % Shroud tube inner radius  
surf  42  hexxc  0.0  0.0  7.250  % Shroud tube outer radius 
surf  43  hexxc  0.0  0.0  7.350  % Outer boundary 

% --- Cells for radial reflector:

cell  41  40  refl    -41         % Reflector               
cell  42  40  tube     41    -42  % Shroud tube              
cell  43  40  cool     42    -43  % Water in channel 
 
% ------------------------- TRIANGULAR PART -------------------------------- %
% --- Triangular surfaces:

surf  21 tric  -2.45   4.24352447854   2.45   1
surf  22 tric   2.45   4.24352447854   2.45   3
surf  23 tric  -4.90   0.0             2.45   3
surf  24 tric   4.90   0.0             2.45   1
surf  25 tric  -2.45  -4.24352447854   2.45   1
surf  26 tric   2.45  -4.24352447854   2.45   3

% --- Sub-assembly cells (switch between hexagonal/triangular baseline):

cell 21t 21t fill 20 -21 
cell 22t 22t fill 20 -22
cell 23t 23t fill 20 -23
cell 24t 24t fill 20 -24
cell 25t 25t fill 20 -25
cell 26t 26t fill 20 -26

% --- Transformations to return to global coordinates (0,0,0):

trans  U  21t   2.45  -4.24352447854   0.0
trans  U  22t  -2.45  -4.24352447854   0.0
trans  U  23t   4.90   0.0             0.0
trans  U  24t  -4.90   0.0             0.0
trans  U  25t   2.45   4.24352447854   0.0
trans  U  26t  -2.45   4.24352447854   0.0

% --- Sub-assembly lattice:

lat  21  9   0.0 0.0 1 0.0 21t
lat  22  9   0.0 0.0 1 0.0 22t
lat  23  9   0.0 0.0 1 0.0 23t
lat  24  9   0.0 0.0 1 0.0 24t
lat  25  9   0.0 0.0 1 0.0 25t
lat  26  9   0.0 0.0 1 0.0 26t

% --- Lattice (type = 14, pin pitch = 4.90 cm):

lat 50  14  4.90 0.00 3 3 4.90
  25 26 40 
  23 24 40 
  21 22 40 

% ------------------------- ASSEMBLY LATTICE -------------------------------- %
% --- Lattice (type = 1, pin pitch = 14.70 cm)

lat 60  2  0.0 0.00 3 3 14.70
  30 10 10
  10 50 10
  10 10 30

surf  70 hexxc 0.0 0.0 14.70

cell  71 70 fill 60     -70       % Fill with assembly lattice
cell  72 70 cool         70

% ------------------------- 4-HEX SUPER-CELL -------------------------------- %

surf  80 hexxprism 0.0 0.0 14.7 0.0 36.9

cell  81 0 fill 70      -80       % Fill with super-cell lattice
cell  82 0 outside       80       % outside world

% ----------------------------- MATERIALS ----------------------------------- %
% --- UO2 fuel enriched to 3.6 wt-% U-235:

mat fuel1   -10.45000 
 92235.09c   -0.03173
 92238.09c   -0.84977
  8016.09c   -0.11850

mat fuel2   -10.45000
 92235.09c   -0.03173
 92238.09c   -0.84977
  8016.09c   -0.11850

mat fuel3   -10.45000
 92235.09c   -0.03173
 92238.09c   -0.84977
  8016.09c   -0.11850

mat fuel4   -10.45000
 92235.09c   -0.03173
 92238.09c   -0.84977
  8016.09c   -0.11850

mat fuel5   -10.45000
 92235.09c   -0.03173
 92238.09c   -0.84977
  8016.09c   -0.11850

mat fuel6   -10.45000
 92235.09c   -0.03173
 92238.09c   -0.84977
  8016.09c   -0.11850

mat fuel7   -10.45000
 92235.09c   -0.03173
 92238.09c   -0.84977
  8016.09c   -0.11850

% --- Zr-Nb cladding and shroud tube wall:

mat clad     -6.55000
 40000.06c   -0.99000
 41093.06c   -0.01000

mat tube     -6.55000
 40000.06c   -0.99000
 41093.06c   -0.01000

% --- Coolant and reflector:

mat cool     -0.72070  moder lwtr 1001
  1001.06c    2.0
  8016.06c    1.0

mat refl     -0.72070  moder lwtr 1001
  1001.03c    2.0
  8016.03c    1.0

% --- Thermal scattering data for light water:

therm lwtr lwj3.11t

% ----------------------------- SETTINGS ------------------------------------ %
% --- Cross section data library file path:

set acelib "sss_jeff311u.xsdata"

% --- Boundary condition:

set bc 3

% --- Neutron population and criticality cycles

set pop 2000 500 20

% --- Geometry and mesh plots:

plot 3 1000 1000 
mesh 3 1000 1000

% --------------------------------------------------------------------------- %</nowiki>