Kraken SMR progression problem

Some background information on the model...

Input files

main input file

/***************************************
 * Input file for SMR demo for Serpent *
 ***************************************/

% Fuel assemblies based on BEAVRS Benchmark rev. 2.0.2
% Active fuel length limited to 200cm as per the NuScale specifications.


include "./includes/materials.inc"

include "./includes/surfaces.inc"

include "./includes/fuelrod.inc"
include "./includes/guidetube.inc"
include "./includes/instrumenttube.inc"
include "./includes/BP.inc"

include "./includes/grid.inc"

include "./includes/assembly_lattices_R.inc"
include "./includes/assembly_universes_R.inc"
include "./includes/assembly_lattices_Y.inc"
include "./includes/assembly_universes_Y.inc"
include "./includes/assembly_lattices_B.inc"
include "./includes/assembly_universes_B.inc"
include "./includes/assembly_lattices_G.inc"
include "./includes/assembly_universes_G.inc"
include "./includes/assembly_lattices_O.inc"
include "./includes/assembly_universes_O.inc"

include "./includes/core.inc"

include "./includes/controlrod.inc"
include "./includes/reflector.inc"

include "./includes/options.inc"

% --- Choose state from here

include "./includes/state_czp.inc"
%include "./includes/state_hzp.inc"
%include "./includes/state_hfp.inc"

%%%%%%
%%%%%%

% --- Truncated cylinder as the outer boundary of the model
%     Diameter (9 feet, RPV approximate inner diameter NuScale
%               Licensing documents Part 2 1.2.1.1.2)

surf sCylinder  cylz 0.0 0.0 137.16 -45 265

% Cell cIN contains reactor

cell cIN    0 fill reactor  -sCylinder

% Cell cOUT is defined as an outside cell

cell cOUT   0 outside        sCylinder

% --- Transformation for the control rod movement
%     The values given are transformations in (x, y, z)
%     Transformation of 0.0 means fully inserted.
%     Transformation of 194.920 means withdrawn.
%     Step height is 0.8549cm and there are 228 steps.
%
%     If either of the control rod banks R or S are withdrawn, single assemblies of that bank can
%     be inserted by setting a negative z-coordinate (-194.920 for fully inserted).

trans u R1 0.0 0.0 0.0
trans u R2 0.0 0.0 0.0
trans u R3 0.0 0.0 0.0
trans u R4 0.0 0.0 0.0
trans u R5 0.0 0.0 0.0
trans u R6 0.0 0.0 0.0
trans u R7 0.0 0.0 0.0
trans u R8 0.0 0.0 0.0
trans u S1 0.0 0.0 0.0
trans u S2 0.0 0.0 0.0
trans u S3 0.0 0.0 0.0
trans u S4 0.0 0.0 0.0
trans u S5 0.0 0.0 0.0
trans u S6 0.0 0.0 0.0
trans u S7 0.0 0.0 0.0
trans u S8 0.0 0.0 0.0
trans u R  0.0 0.0 194.920
trans u S  0.0 0.0 194.920


% Geometry plots

% --- XY-plot
% --- XZ-plot
% --- YZ-plot

plot 3 1000 1000 60 -100 100 -100 100
plot 2 1000 1000 0 -100 100 -45 265
plot 1 1000 1000 21.50364 -100 100 -45 265

/*
plot 3 5000 5000 60 -100 100 -100 100
plot 2 5000 5000 0 -100 100 -45 265
plot 1 5000 5000 21.50364 -100 100 -45 265
*/

% --- Meshplot

mesh 3 1000 1000