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Serpent Wiki - New pages [en]
2024-03-28T12:45:38Z
From Serpent Wiki
MediaWiki 1.25.3
https://serpent.vtt.fi/mediawiki/index.php/2D_4-HEX_super-cell_lattice_geometry
2D 4-HEX super-cell lattice geometry
2024-02-11T13:48:34Z
<p>Jaakko Leppänen: Created page with " <nowiki> % --- 2D Simplified 4-HEX super-cell model-like EBR-II --------------------- % set title "2D Simplified 4-HEX super-cell model-like EBR-II" % ---------------------..."</p>
<hr />
<div> <nowiki><br />
% --- 2D Simplified 4-HEX super-cell model-like EBR-II --------------------- %<br />
<br />
set title "2D Simplified 4-HEX super-cell model-like EBR-II"<br />
<br />
% ------------------------- PIN DEFINITION --------------------------------- %<br />
% --- Fuel pin with central hole:<br />
<br />
pin 1<br />
void 0.07000<br />
fuel1 0.38000<br />
void 0.39000<br />
clad 0.45500<br />
cool <br />
<br />
pin 2<br />
void 0.07000<br />
fuel2 0.38000<br />
void 0.39000<br />
clad 0.45500<br />
cool<br />
<br />
pin 3<br />
void 0.07000<br />
fuel3 0.38000<br />
void 0.39000<br />
clad 0.45500<br />
cool<br />
<br />
pin 4<br />
void 0.07000<br />
fuel4 0.38000<br />
void 0.39000<br />
clad 0.45500<br />
cool<br />
<br />
pin 5<br />
void 0.07000<br />
fuel5 0.38000<br />
void 0.39000<br />
clad 0.45500<br />
cool<br />
<br />
pin 6<br />
void 0.07000<br />
fuel6 0.38000<br />
void 0.39000<br />
clad 0.45500<br />
cool<br />
<br />
pin 7<br />
void 0.07000<br />
fuel7 0.38000<br />
void 0.39000<br />
clad 0.45500<br />
cool<br />
<br />
% --- Central tube:<br />
<br />
pin 8 <br />
cool 0.44000<br />
clad 0.51500<br />
cool <br />
<br />
% --- Empty lattice position:<br />
<br />
pin 9<br />
cool <br />
<br />
% ------------------------- HEXAGONAL PART --------------------------------- %<br />
% --- Lattice (type = 3, pin pitch = 1.23 cm) - hexagonal-baseline:<br />
<br />
lat 10 3 0.0 0.0 15 15 1.23<br />
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9<br />
9 9 9 9 9 9 9 1 1 1 1 1 1 1 9<br />
9 9 9 9 9 9 1 1 1 1 1 1 1 1 9 <br />
9 9 9 9 9 1 1 1 1 1 1 1 1 1 9 <br />
9 9 9 9 1 1 1 1 1 1 1 1 1 1 9 <br />
9 9 9 1 1 1 1 1 1 1 1 1 1 1 9<br />
9 9 1 1 1 1 1 1 1 1 1 1 1 1 9<br />
9 1 1 1 1 1 1 8 1 1 1 1 1 1 9<br />
9 1 1 1 1 1 1 1 1 1 1 1 1 9 9<br />
9 1 1 1 1 1 1 1 1 1 1 1 9 9 9 <br />
9 1 1 1 1 1 1 1 1 1 1 9 9 9 9<br />
9 1 1 1 1 1 1 1 1 1 9 9 9 9 9<br />
9 1 1 1 1 1 1 1 1 9 9 9 9 9 9<br />
9 1 1 1 1 1 1 1 9 9 9 9 9 9 9<br />
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 <br />
<br />
% --- Lattice (type = 3, pin pitch = 1.23 cm) - triangular-baseline:<br />
<br />
lat 20 3 0.0 0.0 15 15 1.23<br />
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9<br />
9 9 9 9 9 9 9 1 7 7 7 7 7 1 9<br />
9 9 9 9 9 9 2 1 7 7 7 7 1 6 9 <br />
9 9 9 9 9 2 2 1 7 7 7 1 6 6 9 <br />
9 9 9 9 2 2 2 1 7 7 1 6 6 6 9 <br />
9 9 9 2 2 2 2 1 7 1 6 6 6 6 9<br />
9 9 2 2 2 2 2 1 1 6 6 6 6 6 9<br />
9 1 1 1 1 1 1 8 1 1 1 1 1 1 9<br />
9 3 3 3 3 3 1 1 5 5 5 5 5 9 9<br />
9 3 3 3 3 1 4 1 5 5 5 5 9 9 9<br />
9 3 3 3 1 4 4 1 5 5 5 9 9 9 9<br />
9 3 3 1 4 4 4 1 5 5 9 9 9 9 9<br />
9 3 1 4 4 4 4 1 5 9 9 9 9 9 9<br />
9 1 4 4 4 4 4 1 9 9 9 9 9 9 9<br />
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 <br />
<br />
% --- Lattice (type = 3, pin pitch = 1.23 cm) - empty:<br />
<br />
lat 30 3 0.0 0.0 15 15 1.23<br />
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9<br />
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9<br />
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9<br />
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9<br />
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9<br />
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9<br />
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9<br />
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9<br />
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9<br />
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 <br />
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9<br />
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9<br />
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9<br />
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9<br />
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9<br />
<br />
% --- Surfaces (assembly pitch = 14.7 cm):<br />
<br />
surf 41 hexxc 0.0 0.0 7.100 % Shroud tube inner radius <br />
surf 42 hexxc 0.0 0.0 7.250 % Shroud tube outer radius <br />
surf 43 hexxc 0.0 0.0 7.350 % Outer boundary <br />
<br />
% --- Cells for radial reflector:<br />
<br />
cell 41 40 refl -41 % Reflector <br />
cell 42 40 tube 41 -42 % Shroud tube <br />
cell 43 40 cool 42 -43 % Water in channel <br />
<br />
% ------------------------- TRIANGULAR PART -------------------------------- %<br />
% --- Triangular surfaces:<br />
<br />
surf 21 tric -2.45 4.24352447854 2.45 1<br />
surf 22 tric 2.45 4.24352447854 2.45 3<br />
surf 23 tric -4.90 0.0 2.45 3<br />
surf 24 tric 4.90 0.0 2.45 1<br />
surf 25 tric -2.45 -4.24352447854 2.45 1<br />
surf 26 tric 2.45 -4.24352447854 2.45 3<br />
<br />
% --- Sub-assembly cells (switch between hexagonal/triangular baseline):<br />
<br />
cell 21t 21t fill 20 -21 <br />
cell 22t 22t fill 20 -22<br />
cell 23t 23t fill 20 -23<br />
cell 24t 24t fill 20 -24<br />
cell 25t 25t fill 20 -25<br />
cell 26t 26t fill 20 -26<br />
<br />
% --- Transformations to return to global coordinates (0,0,0):<br />
<br />
trans U 21t 2.45 -4.24352447854 0.0<br />
trans U 22t -2.45 -4.24352447854 0.0<br />
trans U 23t 4.90 0.0 0.0<br />
trans U 24t -4.90 0.0 0.0<br />
trans U 25t 2.45 4.24352447854 0.0<br />
trans U 26t -2.45 4.24352447854 0.0<br />
<br />
% --- Sub-assembly lattice:<br />
<br />
lat 21 9 0.0 0.0 1 0.0 21t<br />
lat 22 9 0.0 0.0 1 0.0 22t<br />
lat 23 9 0.0 0.0 1 0.0 23t<br />
lat 24 9 0.0 0.0 1 0.0 24t<br />
lat 25 9 0.0 0.0 1 0.0 25t<br />
lat 26 9 0.0 0.0 1 0.0 26t<br />
<br />
% --- Lattice (type = 14, pin pitch = 4.90 cm):<br />
<br />
lat 50 14 4.90 0.00 3 3 4.90<br />
25 26 40 <br />
23 24 40 <br />
21 22 40 <br />
<br />
% ------------------------- ASSEMBLY LATTICE -------------------------------- %<br />
% --- Lattice (type = 1, pin pitch = 14.70 cm)<br />
<br />
lat 60 2 0.0 0.00 3 3 14.70<br />
30 10 10<br />
10 50 10<br />
10 10 30<br />
<br />
surf 70 hexxc 0.0 0.0 14.70<br />
<br />
cell 71 70 fill 60 -70 % Fill with assembly lattice<br />
cell 72 70 cool 70<br />
<br />
% ------------------------- 4-HEX SUPER-CELL -------------------------------- %<br />
<br />
surf 80 hexxprism 0.0 0.0 14.7 0.0 36.9<br />
<br />
cell 81 0 fill 70 -80 % Fill with super-cell lattice<br />
cell 82 0 outside 80 % outside world<br />
<br />
% ----------------------------- MATERIALS ----------------------------------- %<br />
% --- UO2 fuel enriched to 3.6 wt-% U-235:<br />
<br />
mat fuel1 -10.45000 <br />
92235.09c -0.03173<br />
92238.09c -0.84977<br />
8016.09c -0.11850<br />
<br />
mat fuel2 -10.45000<br />
92235.09c -0.03173<br />
92238.09c -0.84977<br />
8016.09c -0.11850<br />
<br />
mat fuel3 -10.45000<br />
92235.09c -0.03173<br />
92238.09c -0.84977<br />
8016.09c -0.11850<br />
<br />
mat fuel4 -10.45000<br />
92235.09c -0.03173<br />
92238.09c -0.84977<br />
8016.09c -0.11850<br />
<br />
mat fuel5 -10.45000<br />
92235.09c -0.03173<br />
92238.09c -0.84977<br />
8016.09c -0.11850<br />
<br />
mat fuel6 -10.45000<br />
92235.09c -0.03173<br />
92238.09c -0.84977<br />
8016.09c -0.11850<br />
<br />
mat fuel7 -10.45000<br />
92235.09c -0.03173<br />
92238.09c -0.84977<br />
8016.09c -0.11850<br />
<br />
% --- Zr-Nb cladding and shroud tube wall:<br />
<br />
mat clad -6.55000<br />
40000.06c -0.99000<br />
41093.06c -0.01000<br />
<br />
mat tube -6.55000<br />
40000.06c -0.99000<br />
41093.06c -0.01000<br />
<br />
% --- Coolant and reflector:<br />
<br />
mat cool -0.72070 moder lwtr 1001<br />
1001.06c 2.0<br />
8016.06c 1.0<br />
<br />
mat refl -0.72070 moder lwtr 1001<br />
1001.03c 2.0<br />
8016.03c 1.0<br />
<br />
% --- Thermal scattering data for light water:<br />
<br />
therm lwtr lwj3.11t<br />
<br />
% ----------------------------- SETTINGS ------------------------------------ %<br />
% --- Cross section data library file path:<br />
<br />
set acelib "sss_jeff311u.xsdata"<br />
<br />
% --- Boundary condition:<br />
<br />
set bc 3<br />
<br />
% --- Neutron population and criticality cycles<br />
<br />
set pop 2000 500 20<br />
<br />
% --- Geometry and mesh plots:<br />
<br />
plot 3 1000 1000 <br />
mesh 3 1000 1000<br />
<br />
% --------------------------------------------------------------------------- %</nowiki></div>
Jaakko Leppänen
https://serpent.vtt.fi/mediawiki/index.php/2D_BWR_fuel_assembly_geometry
2D BWR fuel assembly geometry
2024-02-11T11:35:49Z
<p>Jaakko Leppänen: Created page with " <nowiki> % --- NEA BUC Criticality Safety Benchmark Phase III-C set title "NEA/NSC/R/(2015)6" % ----------------------------------------------------------------------------..."</p>
<hr />
<div> <nowiki><br />
% --- NEA BUC Criticality Safety Benchmark Phase III-C<br />
<br />
set title "NEA/NSC/R/(2015)6"<br />
<br />
% -----------------------------------------------------------------------------<br />
<br />
% --- Geometry ---------------------------------------------------------------<br />
<br />
% --- Fuel Pin definitions:<br />
<br />
pin 1<br />
fuel1 0.48<br />
clad 0.55<br />
cool40<br />
<br />
pin 2<br />
fuel2 0.48<br />
clad 0.55<br />
cool40<br />
<br />
pin 3<br />
fuel3 0.48<br />
clad 0.55<br />
cool40<br />
<br />
pin 4<br />
fuel4 0.48<br />
clad 0.55<br />
cool40<br />
<br />
pin 5<br />
fuel5 0.48<br />
clad 0.55<br />
cool40<br />
<br />
pin G<br />
fuelG 0.48<br />
clad 0.55<br />
cool40<br />
<br />
% --- Empty lattice position:<br />
<br />
pin W<br />
cool40 <br />
<br />
% --- Lattice (type = 1, pin pitch = 1.45):<br />
<br />
lat 10 1 0.0 0.0 11 11 1.45<br />
W W W W W W W W W W W <br />
W 5 4 3 2 2 W W W W W <br />
W W 3 G 2 G W W W W W <br />
W W W 1 2 2 W W W W W <br />
W W W W W W W W W W W <br />
W W W W W W W W W W W <br />
W W W W W W W W W W W <br />
W W W W W W W W W W W <br />
W W W W W W W W W W W <br />
W W W W W W W W W W W <br />
W W W W W W W W W W W<br />
<br />
% --- 45 degree symmetry<br />
<br />
set usym 10 3 2 0.0 0.0 225 45<br />
<br />
% --- Outer channel & box wall (assembly pitch = 15.24):<br />
<br />
surf 1 sqc 0.0 0.0 6.700<br />
surf 2 sqc 0.0 0.0 6.950<br />
surf 3 sqc 0.0 0.0 7.620<br />
<br />
% --- Water channel:<br />
<br />
surf 4 sqc 0.0 0.0 1.850<br />
surf 5 sqc 0.0 0.0 1.925<br />
<br />
% --- Cell definitions:<br />
<br />
cell 1 0 moder -4 % Inner water channel<br />
cell 2 0 box 4 -5 % Inner water channel wall<br />
cell 3 0 fill 10 -1 5 % Pin lattice<br />
cell 4 0 box 1 -2 % Channel box wall<br />
cell 5 0 moder 2 -3 % Outer water cnallel<br />
cell 99 0 outside 3 % Outside world<br />
<br />
% --- Reflective boundary condition:<br />
<br />
set bc 2<br />
<br />
% -----------------------------------------------------------------------------<br />
<br />
% --- Material compositions ---------------------------------------------------<br />
<br />
% --- Fuel type 1: 4.9wt% U235<br />
<br />
mat fuel1 sum burn 1 rgb 227 7 19<br />
92234.09c 8.5649E-6<br />
92235.09c 1.1221E-3<br />
92238.09c 2.1495E-2<br />
8016.09c 4.5252E-2<br />
<br />
% --- Fuel type 2: 4.4wt% U235<br />
<br />
mat fuel2 sum burn 1 rgb 238 130 98<br />
92234.09c 7.6910E-6<br />
92235.09c 1.0076E-3<br />
92238.09c 2.1609E-2<br />
8016.09c 4.5249E-2<br />
<br />
% --- Fuel type 3: 3.9wt% U235<br />
<br />
mat fuel3 sum burn 1 rgb 220 227 131<br />
92234.09c 6.8170E-6<br />
92235.09c 8.9315E-4<br />
92238.09c 2.1723E-2<br />
8016.09c 4.5247E-2<br />
<br />
% --- Fuel type 4: 3.4wt% U235<br />
<br />
mat fuel4 sum burn 1 rgb 212 190 202<br />
92234.09c 5.9431E-6<br />
92235.09c 7.7865E-4<br />
92238.09c 2.1838E-2<br />
8016.09c 4.5244E-2<br />
<br />
% --- Fuel type 5: 2.1wt% U235<br />
<br />
mat fuel5 sum burn 1 rgb 182 178 157<br />
92234.09c 3.6708E-6<br />
92235.09c 4.8094E-4<br />
92238.09c 2.2134E-2<br />
8016.09c 4.5238E-2<br />
<br />
% --- Fuel type G: 3.4wt% U235, 5.0wt% Gd<br />
<br />
mat fuelG sum burn 1 rgb 7 227 19<br />
92234.09c 5.5429E-6<br />
92235.09c 7.2622E-4<br />
92238.09c 2.0367E-2<br />
8016.09c 4.4678E-2<br />
64154.09c 3.6051E-5<br />
64155.09c 2.4475E-4<br />
64156.09c 3.3852E-4<br />
64157.09c 2.5881E-4<br />
64158.09c 4.1079E-4<br />
64160.09c 3.6481E-4<br />
<br />
% --- Division into burnup zones<br />
<br />
div fuel1 sep 1<br />
div fuel2 sep 1<br />
div fuel3 sep 1<br />
div fuel4 sep 1<br />
div fuel5 sep 1<br />
div fuelG sep 1 subr 10 0.0 0.48<br />
<br />
% --- Fuel volumes:<br />
<br />
set mvol<br />
<br />
fuel1 1 2.8953<br />
fuel2 5 2.8953<br />
fuel2 4 5.7906<br />
fuel2 3 5.7906<br />
fuel2 2 2.8953<br />
fuel2 1 5.7906<br />
fuel3 2 2.8953<br />
fuel3 1 5.7906<br />
fuel4 1 5.7906<br />
fuel5 1 2.8953<br />
fuelG 20 0.2895<br />
fuelG 19 0.2895<br />
fuelG 18 0.2895<br />
fuelG 17 0.2895<br />
fuelG 16 0.2895<br />
fuelG 15 0.2895<br />
fuelG 14 0.2895<br />
fuelG 13 0.2895<br />
fuelG 12 0.2895<br />
fuelG 11 0.2895<br />
fuelG 10 0.5791<br />
fuelG 9 0.5791<br />
fuelG 8 0.5791<br />
fuelG 7 0.5791<br />
fuelG 6 0.5791<br />
fuelG 5 0.5791<br />
fuelG 4 0.5791<br />
fuelG 3 0.5791<br />
fuelG 2 0.5791<br />
fuelG 1 0.5791<br />
<br />
% --- Cladding and channel box wall:<br />
<br />
mat clad sum tmp 559 rgb 255 251 220<br />
50000.03c 4.9797E-4<br />
26000.03c 9.1782E-5<br />
24000.03c 7.5861E-5<br />
28000.03c 4.0314E-5<br />
40000.03c 4.2465E-2<br />
<br />
mat box sum tmp 559 rgb 255 251 220<br />
50000.03c 4.9797E-4<br />
26000.03c 9.1782E-5<br />
24000.03c 7.5861E-5<br />
28000.03c 4.0314E-5<br />
40000.03c 4.2465E-2<br />
<br />
% --- Coolant with different void fractions<br />
<br />
mat cool0 sum tmp 559 moder lwtr 1001 rgb 255 255 255<br />
1001.03c 4.9316E-2<br />
8016.03c 2.4658E-2<br />
<br />
mat cool40 sum tmp 559 moder lwtr 1001 rgb 255 255 255<br />
1001.03c 3.0588E-2<br />
8016.03c 1.5294E-2<br />
<br />
mat cool70 sum tmp 559 moder lwtr 1001 rgb 255 255 255<br />
1001.03c 1.6542E-2<br />
8016.03c 8.2712E-2<br />
<br />
% --- Moderator:<br />
<br />
mat moder sum tmp 559 moder lwtr 1001 rgb 161 218 247<br />
1001.03c 4.9316E-2<br />
8016.03c 2.4658E-2<br />
<br />
% --- Thermal scattering data for light water:<br />
<br />
therm lwtr 559 lwj3.09t lwj3.11t<br />
<br />
% -----------------------------------------------------------------------------<br />
<br />
% --- Options & data libraries ------------------------------------------------<br />
<br />
% --- Libraries:<br />
<br />
set acelib "sss_jeff311u.xsdata"<br />
set declib "sss_jeff31.dec"<br />
set nfylib "sss_jeff31.nfy"<br />
<br />
% --- Neutron population and criticality cycles:<br />
<br />
set pop 2000 500 20<br />
<br />
% --- Geometry and mesh plots:<br />
<br />
plot 3 500 500<br />
mesh 3 500 500<br />
<br />
% -----------------------------------------------------------------------------<br />
<br />
% --- Burnup calculation ------------------------------------------------------<br />
<br />
% --- Power density for normalization<br />
<br />
set powdens 25.3E-3<br />
<br />
% --- Predictor-corrector algorithm & sub-steps<br />
<br />
set pcc LELI 10 10<br />
<br />
% --- Depletion history<br />
<br />
dep butot<br />
0.2 0.5<br />
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15<br />
20 25 30 35 40 45 50<br />
<br />
set inventory<br />
<br />
922340<br />
922350<br />
922360<br />
922380<br />
932370<br />
942380<br />
942390<br />
942400<br />
942410<br />
942420<br />
952410<br />
952430<br />
962440<br />
380900<br />
420950<br />
430990<br />
441010<br />
451030<br />
471090<br />
531290<br />
541310<br />
551330<br />
551340<br />
551370<br />
621470<br />
621490<br />
621500<br />
621510<br />
621520<br />
631530<br />
631540<br />
631550<br />
641550<br />
641560<br />
641570<br />
641580<br />
<br />
% -----------------------------------------------------------------------------</nowiki></div>
Jaakko Leppänen
https://serpent.vtt.fi/mediawiki/index.php/2D_VVER-440_fuel_assembly_geometry
2D VVER-440 fuel assembly geometry
2024-02-11T08:56:09Z
<p>Jaakko Leppänen: </p>
<hr />
<div> <nowiki><br />
% --- VVER-440 Assembly --------------------------------------<br />
<br />
set title "VVER-440"<br />
<br />
% --- Fuel pin with central hole:<br />
<br />
pin 1<br />
void 0.07000<br />
fuel 0.38000<br />
void 0.39000<br />
clad 0.45500<br />
water <br />
<br />
% --- Central tube:<br />
<br />
pin 2 <br />
water 0.44000<br />
clad 0.51500<br />
water <br />
<br />
% --- Empty lattice position:<br />
<br />
pin 3<br />
water <br />
<br />
% --- Lattice (type = 2, pin pitch = 1.23 cm):<br />
<br />
lat 10 2 0.0 0.0 15 15 1.23<br />
3 3 3 3 3 3 3 3 3 3 3 3 3 3 3<br />
3 3 3 3 3 3 3 1 1 1 1 1 1 1 3<br />
3 3 3 3 3 3 1 1 1 1 1 1 1 1 3 <br />
3 3 3 3 3 1 1 1 1 1 1 1 1 1 3 <br />
3 3 3 3 1 1 1 1 1 1 1 1 1 1 3 <br />
3 3 3 1 1 1 1 1 1 1 1 1 1 1 3<br />
3 3 1 1 1 1 1 1 1 1 1 1 1 1 3<br />
3 1 1 1 1 1 1 2 1 1 1 1 1 1 3<br />
3 1 1 1 1 1 1 1 1 1 1 1 1 3 3<br />
3 1 1 1 1 1 1 1 1 1 1 1 3 3 3 <br />
3 1 1 1 1 1 1 1 1 1 1 3 3 3 3<br />
3 1 1 1 1 1 1 1 1 1 3 3 3 3 3<br />
3 1 1 1 1 1 1 1 1 3 3 3 3 3 3<br />
3 1 1 1 1 1 1 1 3 3 3 3 3 3 3<br />
3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 <br />
<br />
% --- Surfaces (assembly pitch = 14.7 cm):<br />
<br />
surf 1 hexyc 0.0 0.0 7.100 % Shroud tube inner radius<br />
surf 2 hexyc 0.0 0.0 7.250 % Shroud tube outer radius<br />
surf 3 hexyc 0.0 0.0 7.350 % Outer boundary<br />
<br />
% --- Cells:<br />
<br />
cell 1 0 fill 10 -1 % Pin lattice <br />
cell 4 0 tube 1 -2 % Shroud tube <br />
cell 5 0 water 2 -3 % Water in channel <br />
cell 99 0 outside 3 % Outside world <br />
<br />
% --- UO2 fuel enriched to 3.6 wt-% U-235:<br />
<br />
mat fuel -10.45000<br />
92235.09c -0.03173<br />
92238.09c -0.84977<br />
8016.09c -0.11850<br />
<br />
% --- Zr-Nb cladding and shroud tube:<br />
<br />
mat clad -6.55000<br />
40000.06c -0.99000<br />
41093.06c -0.01000<br />
<br />
mat tube -6.55000<br />
40000.06c -0.97500<br />
41093.06c -0.02500<br />
<br />
% --- Water: (1 ppm boron for iteration)<br />
<br />
mat water -0.7207 moder lwtr 1001<br />
1001.06c 2.0<br />
8016.06c 1.0<br />
5010.06c 0.2E-6<br />
5011.06c 0.8E-6<br />
<br />
% --- Iterate critical boron concentration:<br />
<br />
set iter nuc 50 1.0 2 50100 50110 1 water<br />
<br />
% --- Thermal scattering data for light water:<br />
<br />
therm lwtr lwj3.11t<br />
<br />
% --- Cross section library file path:<br />
<br />
set acelib "sss_jeff31u.xsdata"<br />
<br />
% --- Periodic boundary condition:<br />
<br />
set bc 3<br />
<br />
% --- Neutron population and criticality cycles:<br />
<br />
set pop 2000 500 20<br />
<br />
% --- Mesh plot:<br />
<br />
mesh 3 500 500<br />
<br />
% --- Geometry plots:<br />
<br />
plot 30 500 500 % No boundaries<br />
plot 31 500 500 % Cell boundaries<br />
plot 32 500 500 % Material boundaries (default)<br />
plot 33 500 500 % Both cell amd material boundaries<br />
<br />
% --- Detector energy grid (uniform lethargy):<br />
<br />
ene 1 3 1000 1E-9 12.0<br />
<br />
% --- Flux per lethargy:<br />
<br />
det 1 de 1 dt -3<br />
<br />
% --- Differential capture, fission and production spectra:<br />
<br />
det 2 de 1 dt -2 dr -2 void<br />
det 3 de 1 dt -2 dr -6 void<br />
det 4 de 1 dt -2 dr -7 void<br />
<br />
% --- Integral capture, fission and production spectra:<br />
<br />
det 5 de 1 dt -1 dr -2 void<br />
det 6 de 1 dt -1 dr -6 void<br />
det 7 de 1 dt -1 dr -7 void<br />
<br />
% ------------------------------------------------------------</nowiki><br />
[[Category:Example input files|VVER]]</div>
Jaakko Leppänen