2D VVER-440 fuel assembly geometry

% --- VVER-440 Assembly -------------------------------------- set title "VVER-440" % --- Fuel pin with central hole: pin 1 void 0.07000 fuel 0.38000 void 0.39000 clad 0.45500 water % --- Central tube: pin 2 water 0.44000 clad 0.51500 water % --- Empty lattice position: pin 3 water % --- Lattice (type = 2, pin pitch = 1.23 cm): lat 10 2 0.0 0.0 15 15 1.23 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 1 1 1 1 1 1 1 3 3 3 3 3 3 3 1 1 1 1 1 1 1 1 3 3 3 3 3 3 1 1 1 1 1 1 1 1 1 3 3 3 3 3 1 1 1 1 1 1 1 1 1 1 3 3 3 3 1 1 1 1 1 1 1 1 1 1 1 3 3 3 1 1 1 1 1 1 1 1 1 1 1 1 3 3 1 1 1 1 1 1 2 1 1 1 1 1 1 3 3 1 1 1 1 1 1 1 1 1 1 1 1 3 3 3 1 1 1 1 1 1 1 1 1 1 1 3 3 3 3 1 1 1 1 1 1 1 1 1 1 3 3 3 3 3 1 1 1 1 1 1 1 1 1 3 3 3 3 3 3 1 1 1 1 1 1 1 1 3 3 3 3 3 3 3 1 1 1 1 1 1 1 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 % --- Surfaces (assembly pitch = 14.7 cm): surf 1 hexyc 0.0 0.0 7.100 % Shroud tube inner radius surf 2 hexyc 0.0 0.0 7.250 % Shroud tube outer radius surf 3 hexyc 0.0 0.0 7.350 % Outer boundary % --- Cells: cell 1 0 fill 10 -1 % Pin lattice cell 4 0 tube 1 -2 % Shroud tube cell 5 0 water 2 -3 % Water in channel cell 99 0 outside 3 % Outside world % --- UO2 fuel enriched to 3.6 wt-% U-235: mat fuel -10.45000 92235.09c -0.03173 92238.09c -0.84977 8016.09c -0.11850 % --- Zr-Nb cladding and shroud tube: mat clad -6.55000 40000.06c -0.99000 41093.06c -0.01000 mat tube -6.55000 40000.06c -0.97500 41093.06c -0.02500 % --- Water: (1 ppm boron for iteration) mat water -0.7207 moder lwtr 1001 1001.06c 2.0 8016.06c 1.0 5010.06c 0.2E-6 5011.06c 0.8E-6 % --- Iterate critical boron concentration: set iter nuc 50 1.0 2 50100 50110 1 water % --- Thermal scattering data for light water: therm lwtr lwj3.11t % --- Cross section library file path: set acelib "sss_jeff31u.xsdata" % --- Periodic boundary condition: set bc 3 % --- Neutron population and criticality cycles: set pop 2000 500 20 % --- Mesh plot: mesh 3 500 500 % --- Geometry plots: plot 30 500 500 % No boundaries plot 31 500 500 % Cell boundaries plot 32 500 500 % Material boundaries (default) plot 33 500 500 % Both cell amd material boundaries % --- Detector energy grid (uniform lethargy): ene 1 3 1000 1E-9 12.0 % --- Flux per lethargy: det 1 de 1 dt -3 % --- Differential capture, fission and production spectra: det 2 de 1 dt -2 dr -2 void det 3 de 1 dt -2 dr -6 void det 4 de 1 dt -2 dr -7 void % --- Integral capture, fission and production spectra: det 5 de 1 dt -1 dr -2 void det 6 de 1 dt -1 dr -6 void det 7 de 1 dt -1 dr -7 void % ------------------------------------------------------------