WIMS reactor physics codes

  • Thread starter PhotonEd
  • Start date
  • #1
9
2
Hello hope someone can help me
I need to do WIMS reactor physics codes analysis for
1) divide fuel pin into radial equal-volume sub regions
2) preform criticality calculations to obtain radial fast and thermal neutron flux (use 0.615eV energy cut off between fast and thermal regions)
I will need advise on obtaining flux for the regions as the output file is not showing the 2 group flux, please see the below for some of the input files, many thanks

regards

1) equal section setup as below in .pwrpin file for wimsbuilder

FUEL MATERIAL 1
DENSITY 10.40
TEMP FUELTEMP
COMPOSITION \
U235 1.0997472E-03 \
U238 2.1525591E-02 \
U234 1.0409077E-05 \
U236 3.2482827E-07 \
O 4.5272144E-02

FUEL MATERIAL 2
DENSITY 10.40
TEMP FUELTEMP
COMPOSITION \
U235 1.0997472E-03 \
U238 2.1525591E-02 \
U234 1.0409077E-05 \
U236 3.2482827E-07 \
O 4.5272144E-02

CLAD MATERIAL 3
DENSITY 6.5
TEMP CLADTEMP
COMPOSITION Zr 100

COOLANT MATERIAL 4
DENSITY COOLDENS
TEMP COOLTEMP
COMPOSITION H 11.18983 O 88.81017

ANNULUS 1 RADIUS 0.40950 MATERIAL 1
ANNULUS 2 RADIUS 0.42950 MATERIAL 2
ANNULUS 3 RADIUS 0.47500 MATERIAL 3
ANNULUS 4 MATERIAL 4


2) for energy cut off and group split in .route file

....
ifelse(BRANCH,YES,[CRITIC 8 5],[CRITIC 2 5])
buckling 6 0.00022314 0.000065641 0.00001 0.0
begin
COND 5 6
energy 0.615 *This is for the Energy cut-off (2-groups)
begin
SMEAR 6 7
newmat 1 allm
begin
EDIT 7
groups SPLIT * this is to print for 2 grroup
nuclides Pu239 Pu241
......
 
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Answers and Replies

  • #2
9
2
To anyone of interested
EDIT should be on card 6 before SMEAR as otherwise it will just print out the "smeared" 1 group (1 group) and not the 2 groups (fast ad thermal) as required
codes as of the below
:)

......
ifelse(BRANCH,YES,[CRITIC 8 5],[CRITIC 2 5])
buckling 6 0.00022314 0.000065641 0.00001 0.0
begin
COND 5 6 * Energy cut-off (2-groups)
energy 0.615 0 * Energy cut-off (2-groups)
begin * Energy cut-off (2-groups)

EDIT 6
groups SPLIT * print option for 2gr
begin

SMEAR 6 7
newmat 1 mat 1
*newmat 1 allm
begin
......
 
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