Branch definition

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Branch definition

Postby Yrobel » Wed Jan 03, 2018 2:54 am

Hi,
I have a doubt in the output results when using the branch card. The output _res.m file is restarted for the branch number invoked. In this example, my idea is to insert fresh fuel into the core. But the results for the k-eff do not understand them correctly. Is it possible that he is doing something incorrectly?
Regards :)

Code: Select all
%--- Irradiation cycle - Burnup options

dep butot
   1.0
   2.0
   3.0
   4.0
   5.0
   6.0
   7.0
   8.0
   9.0
  10.0
  12.0
  14.0
  16.0
  18.0
  20.0
  22.0
  24.0
  26.0
  28.0
  30.0
  32.0
  34.0
  36.0
  38.0
  40.0
  45.0
  50.0
  55.0
  60.0

%---Branches

%--- Inner core

mat freshfuel1  -10.90061 rgb 255 0 255 burn 1   %---rosa fiusha

92235.12c  -0.005814 % U-235.12c
92238.12c  -0.811986 % U-238.12c
94238.12c  -0.003599 % Pu-238.12c
94239.12c  -0.074963 % Pu-239.12c
94240.12c  -0.034816 % Pu-240.12c
94241.12c  -0.009989 % Pu-241.12c
94242.12c  -0.009895 % Pu-242.12c
95241.12c  -0.000945 % Am-241.12c
6000.12c   -0.047992 % C-nat.12c

mat freshfuel12  -10.90061 rgb 255 255 0  burn 1  %---rosa fiusha

92235.12c  -0.005814 % U-235.12c
92238.12c  -0.811986 % U-238.12c
94238.12c  -0.003599 % Pu-238.12c
94239.12c  -0.074963 % Pu-239.12c
94240.12c  -0.034816 % Pu-240.12c
94241.12c  -0.009989 % Pu-241.12c
94242.12c  -0.009895 % Pu-242.12c
95241.12c  -0.000945 % Am-241.12c
6000.12c   -0.047992 % C-nat.12c

mat freshfuel13  -10.90061 rgb 93 0 255  burn 1 %---rosa fiusha

92235.12c  -0.005814 % U-235.12c
92238.12c  -0.811986 % U-238.12c
94238.12c  -0.003599 % Pu-238.12c
94239.12c  -0.074963 % Pu-239.12c
94240.12c  -0.034816 % Pu-240.12c
94241.12c  -0.009989 % Pu-241.12c
94242.12c  -0.009895 % Pu-242.12c
95241.12c  -0.000945 % Am-241.12c
6000.12c   -0.047992 % C-nat.12c

%--- Outer core

mat freshfuel2  -10.89976  rgb 192 192 192   burn 1 %---Plata

92235.12c  -0.005576 % U-235.12c
92238.12c  -0.778671 % U-238.12c   
94238.12c  -0.004499 % Pu-238.12c
94239.12c  -0.093712 % Pu-239.12c
94240.12c  -0.043523 % Pu-240.12c
94241.12c  -0.012487 % Pu-241.12c
94242.12c  -0.012370 % Pu-242.12c
95241.12c  -0.001181 % Am-241.12c
6000.12c   -0.047981  % C-nat.12c


mat freshfuel22  -10.89976  rgb 255 0 0  burn 1  %---Plata

92235.12c  -0.005576 % U-235.12c
92238.12c  -0.778671 % U-238.12c   
94238.12c  -0.004499 % Pu-238.12c
94239.12c  -0.093712 % Pu-239.12c
94240.12c  -0.043523 % Pu-240.12c
94241.12c  -0.012487 % Pu-241.12c
94242.12c  -0.012370 % Pu-242.12c
95241.12c  -0.001181 % Am-241.12c
6000.12c   -0.047981  % C-nat.12c

mat freshfuel23  -10.89976  rgb 0 255 0  burn 1 %---Plata

92235.12c  -0.005576 % U-235.12c
92238.12c  -0.778671 % U-238.12c   
94238.12c  -0.004499 % Pu-238.12c
94239.12c  -0.093712 % Pu-239.12c
94240.12c  -0.043523 % Pu-240.12c
94241.12c  -0.012487 % Pu-241.12c
94242.12c  -0.012370 % Pu-242.12c
95241.12c  -0.001181 % Am-241.12c
6000.12c   -0.047981  % C-nat.12c

%--- Branches inner core

branch refuel
repm fuel1 freshfuel1 
repm fuel12 freshfuel12
repm fuel13 freshfuel13

repm fuel2 freshfuel2
repm fuel22 freshfuel22
repm fuel23 freshfuel23

% --- Coefficient matrix:

coef 6  10 20 30 40 50 60 

1 refuel

%--- Options:

set bumode 2   %---CRAM method
set pcc    1   %---Predictor-corrector
set xscalc 2   %---Cross sections from spectrum
set printm 1   %---Material composition by step

%---Power density kW/g

set powdens 0.0354

% --- Nuclide inventory:

set inventory

902320
922330
922340
922350
922360
922370
922380
922390
932360
932370
932380
932390
Attachments
GFR2400CR_3batch_geom1.png
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Yrobel
 
Posts: 39
Joined: Thu Feb 09, 2017 3:59 am

Re: Branch definition

Postby Jaakko Leppänen » Fri Jan 05, 2018 10:56 am

What kind of results do you get and what are you trying to do with the branches?
- Jaakko
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Jaakko Leppänen
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Re: Branch definition

Postby Yrobel » Sat Jan 06, 2018 5:06 am

I'm trying to introduce fresh fuel into the reactor core. Is it possible to do this by defining the branches for the burnup points?
Thanks!.
Regards.
Yrobel
 
Posts: 39
Joined: Thu Feb 09, 2017 3:59 am

Re: Branch definition

Postby Jaakko Leppänen » Sat Jan 06, 2018 1:34 pm

Do you mean replacing some of the fuel and continuing the burnup cycle?

The branch feature works by first running the burnup calculation from beginning to end, and then performing restarts to the given burnup points with variations defined using the branch cards. The burnup calculation is not continued after the branches.
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Re: Branch definition

Postby Yrobel » Sat Jan 06, 2018 3:09 pm

Thanks for your clarification.
Regards.
Yrobel
 
Posts: 39
Joined: Thu Feb 09, 2017 3:59 am

Re: Branch definition

Postby Jaakko Leppänen » Mon Jan 08, 2018 12:53 pm

Note that you can continue a previous burnup calculation by writing the nuclide compositions in a binary restart file using the "set rfw" / "set rfr" cards: http://serpent.vtt.fi/mediawiki/index.p ... al#set_rfw
- Jaakko
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