% --- CANDU cluster ------------------------------------------
set title "CANDU"
% --- Fuel pin:
pin 1
fuel 0.6122
clad 0.6540
cool
% --- Lattice (type = 4, 4 rings, 3rd ring rotated 15 deg.):
lat 10 4 0.0 0.0 4
1 0.0000 0.0 1
6 1.4885 0.0 1 1 1 1 1 1
12 2.8755 15.0 1 1 1 1 1 1 1 1 1 1 1 1
18 4.3305 0.0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
% --- Surfaces:
surf 1 cyl 0.0 0.0 5.1689 % Pressure tube inner wall
surf 2 cyl 0.0 0.0 5.6032 % Pressure tube outer wall
surf 3 cyl 0.0 0.0 6.4478 % Calandria tube inner wall
surf 4 cyl 0.0 0.0 6.5875 % Calandria tube outer wall
surf 5 sqc 0.0 0.0 14.2870 % Outer boundary
% --- Cells:
cell 1 0 fill 10 -1 % Pin lattice
cell 2 0 tube 1 -2 % Pressure tube
cell 3 0 void 2 -3 % Void between tubes
cell 4 0 caltube 3 -4 % Calandria tube
cell 5 0 moder 4 -5 % Moderator channel
cell 6 0 outside 5 % Outside world
% --- Fuel (UO2, natural uranium, 0.7% U-235):
mat fuel -10.4375010
8016.09c -1.18473E+1
92235.09c -6.27118E-1
92238.09c -8.75256E+1
% --- Cladding:
mat clad -6.44
25055.06c -1.60000E-1
28000.06c -6.00000E-2
24000.06c -1.10000E-1
40000.06c -9.97100E+1
5010.06c -5.7409e-05
5011.06c -2.5259E-04
% --- Pressure tube:
mat tube -6.57
40000.06c -9.75000E+1
5010.06c -3.8889E-05
5011.06c -1.7111E-04
% --- Calandria tube:
mat caltube -6.44
25055.06c -1.60000E-1
28000.06c -6.00000E-2
24000.06c -1.10000E-1
40000.06c -9.97100E+1
5010.06c -5.7409e-05
5011.06c -2.5259E-04
% --- Coolant water:
mat cool -0.812120 moder lwtr 1001 moder hwtr 1002
8016.06c -7.99449E-1
1002.06c -1.99768E-1
1001.06c -7.83774E-4
% --- Moderator water:
mat moder -1.082885 moder lwtr 1001 moder hwtr 1002
8016.06c -7.98895E-1
1002.06c -2.01016E-1
1001.06c -8.96000E-5
% --- Thermal scattering data for light and heavy water:
therm lwtr lwj3.11t
therm hwtr hwj3.11t
% --- Cross section data library file path:
set acelib "sss_jeff311u.xsdata"
% --- Periodic boundary condition:
set bc 3
% --- Neutron population and criticality cycles:
set pop 2000 500 20
% --- Geometry and mesh plots:
plot 3 500 500
mesh 3 500 500
% ------------------------------------------------------------
