set power normalization

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aleja311
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set power normalization

Post by aleja311 » Sun Jun 30, 2013 7:32 pm

I am attempting to calculate the leakage probability in my core. The model is composed of a TRU cylinder surrounded by a HT9 reflector.
My input also utilizes burnup and sets a power level. This then automatically normalizes my detector results for surface current.
For the normalization, is it taking the surface current in neutrons/cm^2 per source neutron and multiplying by a neutron source in neutrons/second?
If I divide my result by a neutron source I get a similar answer to the result if I did not set a power level so I am assuming this is correct.
However, if I want to divide by a neutron source I need the Q value and eta. Do I have to calculate these additionally or is this stated somewhere?

Also in regards to current surface output without a set power. The answer should be in neutrons/cm^2 per source neutron. Can I pretty much assume this to be the leakage probability? It seems correct because it is calculating surface current for one neutron which is pretty much the fraction of leakage but I want to double check.

Thank you!
Alejandra

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Jaakko Leppänen
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Re: set power normalization

Post by Jaakko Leppänen » Mon Jul 01, 2013 12:56 pm

The units for the surface current tally are in neutron/s. The value is not divided by the surface area, because there is no safe way to calculate that within the code.

In the _res.m output there is a separate section for normalized total reaction rates:

Code: Select all

% Normalized total reaction rates:

TOT_POWER                 (idx, [1:   2]) = [  1.21101E-11 0.00055 ];
TOT_GENRATE               (idx, [1:   2]) = [  9.18263E-01 0.00055 ];
TOT_FISSRATE              (idx, [1:   2]) = [  3.73240E-01 0.00056 ];
TOT_ABSRATE               (idx, [1:   2]) = [  1.00000E+00 0.00000 ];
TOT_LEAKRATE              (idx, [1:   2]) = [  0.00000E+00 0.00000 ];
TOT_LOSSRATE              (idx, [1:   2]) = [  1.00000E+00 0.00000 ];
TOT_FLUX                  (idx, [1:   2]) = [  1.76238E+02 0.00062 ];
TOT_RR                    (idx, [1:   2]) = [  5.89023E+01 0.00062 ];
By default the normalization is set to total loss rate = 1 (for compatibility with MCNP, If I remember correctly). In a criticality source simulation, the total neutron generation rate (TOT_GENRATE) divided by the analog estimator of k-eff (ANA_KEFF) should give you the number of fission neutrons emitted per second.

Leakage rate calculated by the detector gives you the total number of neutrons escaped from the system per second. Whether or not this is equal to the leakage probability depends on what you mean by the term. Some small fraction of the escaped neutrons were born in (n,2n) reactions, and in theory, if you have completely non-absorbing system, your leakage rate can exceed the rate at which neutrons are generated in fissions. In any case, the value given by the detector should be equal to the total leakage rate (TOT_LEAKRATE) in the _res.m output (at least within statistics, there may be some small numerical difference because the estimator is different).
- Jaakko

subterfug3x
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Re: set power normalization

Post by subterfug3x » Sat Jun 15, 2019 9:22 am

Jaakko Leppänen wrote:
Mon Jul 01, 2013 12:56 pm
The units for the surface current tally are in neutron/s. The value is not divided by the surface area, because there is no safe way to calculate that within the code.

In the _res.m output there is a separate section for normalized total reaction rates:

Code: Select all

% Normalized total reaction rates:

TOT_POWER                 (idx, [1:   2]) = [  1.21101E-11 0.00055 ];
TOT_GENRATE               (idx, [1:   2]) = [  9.18263E-01 0.00055 ];
TOT_FISSRATE              (idx, [1:   2]) = [  3.73240E-01 0.00056 ];
TOT_ABSRATE               (idx, [1:   2]) = [  1.00000E+00 0.00000 ];
TOT_LEAKRATE              (idx, [1:   2]) = [  0.00000E+00 0.00000 ];
TOT_LOSSRATE              (idx, [1:   2]) = [  1.00000E+00 0.00000 ];
TOT_FLUX                  (idx, [1:   2]) = [  1.76238E+02 0.00062 ];
TOT_RR                    (idx, [1:   2]) = [  5.89023E+01 0.00062 ];
By default the normalization is set to total loss rate = 1 (for compatibility with MCNP, If I remember correctly). In a criticality source simulation, the total neutron generation rate (TOT_GENRATE) divided by the analog estimator of k-eff (ANA_KEFF) should give you the number of fission neutrons emitted per second.

Leakage rate calculated by the detector gives you the total number of neutrons escaped from the system per second. Whether or not this is equal to the leakage probability depends on what you mean by the term. Some small fraction of the escaped neutrons were born in (n,2n) reactions, and in theory, if you have completely non-absorbing system, your leakage rate can exceed the rate at which neutrons are generated in fissions. In any case, the value given by the detector should be equal to the total leakage rate (TOT_LEAKRATE) in the _res.m output (at least within statistics, there may be some small numerical difference because the estimator is different).
Hello,
I have a model of the small AmO2-Be neutron source. The problem of interest is the surface neutron current on the cylinder surface, I set the srcrate normalization (n/s), but surface detector scores more neutrons than neutron source generating.

Integral of the Cylinder Surface Detector is about 7.11E6 n/s that is equal to TOTAL_LEAKRATE and seems to be OK, but what is interesting - "Neutron balance" shows that N,XN reactions are missing in the system, capture rate is much more than the fission rate. So the main question is: Why the surface detector scores more neutrons than the neutron source generating and and TOTAL_LEAKRATE exceeds srcrate in this system?

Serpent 2.1.30 ENDF-B/VII.0

Code: Select all

% -----------------------------------------------------------------------------

set title "AmO2-576-2 Be Source"  

% -----------------------------------------------------------------------------

% Geometry:

% -----------------------------------------------------------------------------

cell 1     0 AmBe      -1
cell 2     0 Steel       -2 1
cell 3     0 outside     2 

% -----------------------------------------------------------------------------

surf 1      cylz 0.0 0.0 1.11  -2.415 2.415    % Source
surf 2      cylz 0.0 0.0 1.35  -2.900 2.900    % Container
surf 3      cylz 0.0 0.0 5.00  -10.00 10.00    % Boundary Air


% -----------------------------------------------------------------------------

% Material data:

% -----------------------------------------------------------------------------

mat AmBe       5.66E-02 rgb 166 0 0

  4009.03c     9.95E-01
  8016.03c     3.45E-03
  8017.03c     1.31E-06
 95241.03c     1.63E-03
 95242.03c     6.21E-05
 95243.03c     3.09E-05

mat Steel     -7.86 rgb 32 32 32
  6000.03c    -0.000750
  7014.03c    -0.001250
 14000.03c    -0.005000
 15031.03c    -0.000300
 16000.03c    -0.000150
 24000.03c    -0.180000
 25055.03c    -0.087500
 26000.03c    -0.675050
 28000.03c    -0.050000

mat Air       -0.001205 rgb 255 255 255

  6000.03c     0.000150
  7014.03c     0.784431
  8016.03c     0.210748
 18040.03c    0.004671

% -----------------------------------------------------------------------------

% Calculation parameters:

% -----------------------------------------------------------------------------

% --- Geometry plot:

plot 3 500 500
plot 2 500 500

mesh 3 500 500
mesh 2 500 500

% --- Detectors
% --- Steel Container Detector
det SteelNetSideSurfaceCurrent
ds  2  0    
de  EquiLet
ene EquiLet 1
0
1.00E-01
2.00E-01
3.00E-01
4.00E-01
5.00E-01
6.00E-01
7.00E-01
8.00E-01
9.00E-01
1.00E+00
1.10E+00
1.20E+00
1.30E+00
1.40E+00
1.50E+00
1.60E+00
1.70E+00
1.80E+00
1.90E+00
2.00E+00
2.10E+00
2.20E+00
2.30E+00
2.40E+00
2.50E+00
2.60E+00
2.70E+00
2.80E+00
2.90E+00
3.00E+00
3.10E+00
3.20E+00
3.30E+00
3.40E+00
3.50E+00
3.60E+00
3.70E+00
3.80E+00
3.90E+00
4.00E+00
4.10E+00
4.20E+00
4.30E+00
4.40E+00
4.50E+00
4.60E+00
4.70E+00
4.80E+00
4.90E+00
5.00E+00
5.10E+00
5.20E+00
5.30E+00
5.40E+00
5.50E+00
5.60E+00
5.70E+00
5.80E+00
5.90E+00
6.00E+00
6.10E+00
6.20E+00
6.30E+00
6.40E+00
6.50E+00
6.60E+00
6.70E+00
6.80E+00
6.90E+00
7.00E+00
7.10E+00
7.20E+00
7.30E+00
7.40E+00
7.50E+00
7.60E+00
7.70E+00
7.80E+00
7.90E+00
8.00E+00
8.10E+00
8.20E+00
8.30E+00
8.40E+00
8.50E+00
8.60E+00
8.70E+00
8.80E+00
8.90E+00
9.00E+00
9.10E+00
9.20E+00
9.30E+00
9.40E+00
9.50E+00
9.60E+00
9.70E+00
9.80E+00
9.90E+00
1.00E+01
1.01E+01
1.02E+01
1.03E+01
1.04E+01
1.05E+01
1.06E+01
1.07E+01
1.08E+01
1.09E+01
1.10E+01
1.11E+01
1.12E+01
1.13E+01
1.14E+01
1.15E+01
1.16E+01
1.17E+01
1.18E+01
1.19E+01
1.20E+01

% --- Source cylinder detector
det SourceNetSideSurfaceCurrent
ds  1  0    
de  EquiLet

% --- Source

src AmBe576 n sc 1
sb 120 1.00E-01	4.55E+04
2.00E-01	7.15E+04
3.00E-01	7.16E+04
4.00E-01	7.34E+04
5.00E-01	7.69E+04
6.00E-01	8.25E+04
7.00E-01	8.61E+04
8.00E-01	8.21E+04
9.00E-01	7.40E+04
1.00E+00	6.26E+04
1.10E+00	5.68E+04
1.20E+00	5.34E+04
1.30E+00	5.01E+04
1.40E+00	4.56E+04
1.50E+00	4.09E+04
1.60E+00	3.58E+04
1.70E+00	3.33E+04
1.80E+00	3.67E+04
1.90E+00	4.70E+04
2.00E+00	5.31E+04
2.10E+00	5.65E+04
2.20E+00	5.97E+04
2.30E+00	6.14E+04
2.40E+00	6.15E+04
2.50E+00	6.12E+04
2.60E+00	6.12E+04
2.70E+00	6.69E+04
2.80E+00	7.34E+04
2.90E+00	8.40E+04
3.00E+00	1.02E+05
3.10E+00	1.22E+05
3.20E+00	1.38E+05
3.30E+00	1.43E+05
3.40E+00	1.32E+05
3.50E+00	1.23E+05
3.60E+00	1.17E+05
3.70E+00	1.13E+05
3.80E+00	1.10E+05
3.90E+00	1.08E+05
4.00E+00	1.06E+05
4.10E+00	1.05E+05
4.20E+00	1.04E+05
4.30E+00	1.03E+05
4.40E+00	1.03E+05
4.50E+00	1.04E+05
4.60E+00	1.05E+05
4.70E+00	1.07E+05
4.80E+00	1.11E+05
4.90E+00	1.15E+05
5.00E+00	1.19E+05
5.10E+00	1.16E+05
5.20E+00	1.15E+05
5.30E+00	1.13E+05
5.40E+00	1.10E+05
5.50E+00	1.04E+05
5.60E+00	1.01E+05
5.70E+00	1.03E+05
5.80E+00	1.01E+05
5.90E+00	9.24E+04
6.00E+00	8.16E+04
6.10E+00	7.08E+04
6.20E+00	6.46E+04
6.30E+00	6.07E+04
6.40E+00	5.64E+04
6.50E+00	5.94E+04
6.60E+00	5.95E+04
6.70E+00	5.65E+04
6.80E+00	5.02E+04
6.90E+00	4.45E+04
7.00E+00	4.18E+04
7.10E+00	4.17E+04
7.20E+00	4.34E+04
7.30E+00	4.65E+04
7.40E+00	5.06E+04
7.50E+00	5.51E+04
7.60E+00	5.88E+04
7.70E+00	6.13E+04
7.80E+00	6.25E+04
7.90E+00	6.25E+04
8.00E+00	6.12E+04
8.10E+00	5.87E+04
8.20E+00	5.37E+04
8.30E+00	4.61E+04
8.40E+00	3.87E+04
8.50E+00	3.31E+04
8.60E+00	2.81E+04
8.70E+00	2.35E+04
8.80E+00	1.94E+04
8.90E+00	1.60E+04
9.00E+00	1.37E+04
9.10E+00	1.25E+04
9.20E+00	1.28E+04
9.30E+00	1.46E+04
9.40E+00	1.75E+04
9.50E+00	2.09E+04
9.60E+00	2.31E+04
9.70E+00	2.37E+04
9.80E+00	2.44E+04
9.90E+00	2.44E+04
1.00E+01	2.42E+04
1.01E+01	2.36E+04
1.02E+01	2.24E+04
1.03E+01	2.06E+04
1.04E+01	1.80E+04
1.05E+01	1.52E+04
1.06E+01	1.28E+04
1.07E+01	1.08E+04
1.08E+01	8.07E+03
1.09E+01	4.98E+03
1.10E+01	1.96E+03
1.11E+01	1.13E+02
1.12E+01	0.00E+00
1.13E+01	0.00E+00
1.14E+01	0.00E+00
1.15E+01	0.00E+00
1.16E+01	0.00E+00
1.17E+01	0.00E+00
1.18E+01	0.00E+00
1.19E+01	0.00E+00
1.20E+01	0.00E+00

% --- Run Parameters

set bc 1
set srcrate 6.97E+06
set nps 10000000000

% --- Libraries:

set acelib "/home/iol4/serpent2/xs/endfb7/sss_endfb7u.xsdata"
set declib "/home/iol4/serpent2/xs/endfb7/sss_endfb7.dec"
set nfylib "/home/iol4/serpent2/xs/endfb7/sss_endfb7.nfy"
Output .res

Code: Select all

% Neutron balance (particles/weight):

BALA_SRC_NEUTRON_SRC     (idx, [1:  2])  = [ 1000000000 6.29264E+13 ];
BALA_SRC_NEUTRON_FISS    (idx, [1:  2])  = [ 876078 4.93156E+10 ];
BALA_SRC_NEUTRON_NXN     (idx, [1:  2])  = [ 0 1.56051E+12 ];
BALA_SRC_NEUTRON_VR      (idx, [1:  2])  = [ 0 0.00000E+00 ];
BALA_SRC_NEUTRON_TOT     (idx, [1:  2])  = [ 1000876078 6.45362E+13 ];

BALA_LOSS_NEUTRON_CAPT    (idx, [1:  2])  = [ 4858716 3.17041E+11 ];
BALA_LOSS_NEUTRON_FISS    (idx, [1:  2])  = [ 217222 1.28217E+10 ];
BALA_LOSS_NEUTRON_LEAK    (idx, [1:  2])  = [ 995800140 6.42063E+13 ];
BALA_LOSS_NEUTRON_CUT     (idx, [1:  2])  = [ 0 0.00000E+00 ];
BALA_LOSS_NEUTRON_ERR     (idx, [1:  2])  = [ 0 0.00000E+00 ];
BALA_LOSS_NEUTRON_TOT     (idx, [1:  2])  = [ 1000876078 6.45362E+13 ];

BALA_NEUTRON_DIFF         (idx, [1:  2])  = [ 0 0.00000E+00 ];

% Normalized total reaction rates (neutrons):

TOT_POWER                 (idx, [1:   2]) = [  4.77623E-08 0.00011 ];
TOT_POWDENS               (idx, [1:   2]) = [  0.00000E+00 0.0E+00 ];
TOT_GENRATE               (idx, [1:   2]) = [  5.43864E+03 0.00011 ];
TOT_FISSRATE              (idx, [1:   2]) = [  1.41407E+03 0.00011 ];
TOT_CAPTRATE              (idx, [1:   2]) = [  3.51070E+04 9.7E-05 ];
TOT_ABSRATE               (idx, [1:   2]) = [  3.65211E+04 9.7E-05 ];
TOT_SRCRATE               (idx, [1:   2]) = [  6.97000E+06 0.0E+00 ];
TOT_FLUX                  (idx, [1:   2]) = [  1.16941E+07 8.3E-05 ];
TOT_PHOTON_PRODRATE       (idx, [1:   4]) = [  0.00000E+00 0.0E+00  0.00000E+00 0.0E+00 ];
TOT_LEAKRATE              (idx, [1:   2]) = [  7.11177E+06 6.7E-06 ];
ALBEDO_LEAKRATE           (idx, [1:   2]) = [  0.00000E+00 0.0E+00 ];
TOT_LOSSRATE              (idx, [1:   2]) = [  7.14830E+06 6.8E-06 ];
TOT_CUTRATE               (idx, [1:   2]) = [  0.00000E+00 0.0E+00 ];
TOT_RR                    (idx, [1:   2]) = [  2.07222E+06 8.1E-05 ];
INI_FMASS                 (idx, 1)        =  0.00000E+00 ;
TOT_FMASS                 (idx, 1)        =  0.00000E+00 ;

% Criticality eigenvalues:

ANA_KEFF                  (idx, [1:   6]) = [  7.83088E-04 0.00253  0.00000E+00 0.0E+00  0.00000E+00 0.0E+00 ];
IMP_KEFF                  (idx, [1:   2]) = [  7.79692E-04 0.00011 ];
COL_KEFF                  (idx, [1:   2]) = [  7.79684E-04 0.00011 ];
ABS_KEFF                  (idx, [1:   2]) = [  7.79692E-04 0.00011 ];
ABS_KINF                  (idx, [1:   2]) = [ -3.98710E-02 6.5E-05 ];
ANA_EXT_K                 (idx, [1:  20]) = [  7.83163E-04 0.00253  6.93856E-04 0.09757  0.00000E+00 0.0E+00  0.00000E+00 0.0E+00  0.00000E+00 0.0E+00  0.00000E+00 0.0E+00  0.00000E+00 0.0E+00  0.00000E+00 0.0E+00  0.00000E+00 0.0E+00  0.00000E+00 0.0E+00 ];
SRC_MULT                  (idx, [1:   2]) = [  1.00078E+00 2.0E-06 ];
MEAN_NGEN                 (idx, [1:   2]) = [  0.00000E+00 0.0E+00 ];
PROMPT_CHAIN_LENGTH       (idx, [1:   2]) = [  1.00074E+00 5.9E-05 ];
GEOM_ALBEDO               (idx, [1:   6]) = [  1.00000E+00 0.0E+00  1.00000E+00 0.0E+00  1.00000E+00 0.0E+00 ];[code]
Output Surface Detector

Code: Select all

DETSteelNetSideSurfaceCurrent = [
    1    1    1    1    1    1    1    1    1    1 -3.22208E+04 0.00075 
    2    2    1    1    1    1    1    1    1    1 -1.10037E+05 0.00031 
    3    3    1    1    1    1    1    1    1    1 -1.10414E+05 0.00031 
    4    4    1    1    1    1    1    1    1    1 -1.15345E+05 0.00033 
    5    5    1    1    1    1    1    1    1    1 -1.17906E+05 0.00031 
    6    6    1    1    1    1    1    1    1    1 -1.18095E+05 0.00031 
    7    7    1    1    1    1    1    1    1    1 -1.09001E+05 0.00031 
    8    8    1    1    1    1    1    1    1    1 -1.08014E+05 0.00031 
    9    9    1    1    1    1    1    1    1    1 -9.39765E+04 0.00032 
   10   10    1    1    1    1    1    1    1    1 -8.31460E+04 0.00033 
   11   11    1    1    1    1    1    1    1    1 -7.55036E+04 0.00033 
   12   12    1    1    1    1    1    1    1    1 -7.16782E+04 0.00033 
   13   13    1    1    1    1    1    1    1    1 -6.71975E+04 0.00033 
   14   14    1    1    1    1    1    1    1    1 -6.24841E+04 0.00033 
   15   15    1    1    1    1    1    1    1    1 -5.78912E+04 0.00036 
   16   16    1    1    1    1    1    1    1    1 -5.35394E+04 0.00036 
   17   17    1    1    1    1    1    1    1    1 -5.20052E+04 0.00037 
   18   18    1    1    1    1    1    1    1    1 -5.51503E+04 0.00035 
   19   19    1    1    1    1    1    1    1    1 -6.32975E+04 0.00035 
   20   20    1    1    1    1    1    1    1    1 -6.76044E+04 0.00034 
   21   21    1    1    1    1    1    1    1    1 -6.96231E+04 0.00032 
   22   22    1    1    1    1    1    1    1    1 -7.18518E+04 0.00035 
   23   23    1    1    1    1    1    1    1    1 -7.26327E+04 0.00033 
   24   24    1    1    1    1    1    1    1    1 -7.18254E+04 0.00035 
   25   25    1    1    1    1    1    1    1    1 -7.12004E+04 0.00033 
   26   26    1    1    1    1    1    1    1    1 -7.12707E+04 0.00034 
   27   27    1    1    1    1    1    1    1    1 -7.52085E+04 0.00034 
   28   28    1    1    1    1    1    1    1    1 -7.74675E+04 0.00035 
   29   29    1    1    1    1    1    1    1    1 -8.66540E+04 0.00033 
   30   30    1    1    1    1    1    1    1    1 -1.02285E+05 0.00033 
   31   31    1    1    1    1    1    1    1    1 -1.17841E+05 0.00034 
   32   32    1    1    1    1    1    1    1    1 -1.30137E+05 0.00034 
   33   33    1    1    1    1    1    1    1    1 -1.33174E+05 0.00034 
   34   34    1    1    1    1    1    1    1    1 -1.23716E+05 0.00033 
   35   35    1    1    1    1    1    1    1    1 -1.15364E+05 0.00035 
   36   36    1    1    1    1    1    1    1    1 -1.10225E+05 0.00034 
   37   37    1    1    1    1    1    1    1    1 -1.06423E+05 0.00033 
   38   38    1    1    1    1    1    1    1    1 -1.03573E+05 0.00034 
   39   39    1    1    1    1    1    1    1    1 -1.01605E+05 0.00034 
   40   40    1    1    1    1    1    1    1    1 -9.99315E+04 0.00033 
   41   41    1    1    1    1    1    1    1    1 -9.91983E+04 0.00034 
   42   42    1    1    1    1    1    1    1    1 -9.83510E+04 0.00034 
   43   43    1    1    1    1    1    1    1    1 -9.76010E+04 0.00035 
   44   44    1    1    1    1    1    1    1    1 -9.68112E+04 0.00034 
   45   45    1    1    1    1    1    1    1    1 -9.79098E+04 0.00035 
   46   46    1    1    1    1    1    1    1    1 -9.85423E+04 0.00033 
   47   47    1    1    1    1    1    1    1    1 -1.00308E+05 0.00034 
   48   48    1    1    1    1    1    1    1    1 -1.03681E+05 0.00034 
   49   49    1    1    1    1    1    1    1    1 -1.06885E+05 0.00034 
   50   50    1    1    1    1    1    1    1    1 -1.09750E+05 0.00032 
   51   51    1    1    1    1    1    1    1    1 -1.06896E+05 0.00034 
   52   52    1    1    1    1    1    1    1    1 -1.05636E+05 0.00035 
   53   53    1    1    1    1    1    1    1    1 -1.03770E+05 0.00035 
   54   54    1    1    1    1    1    1    1    1 -1.00659E+05 0.00034 
   55   55    1    1    1    1    1    1    1    1 -9.54649E+04 0.00034 
   56   56    1    1    1    1    1    1    1    1 -9.26519E+04 0.00035 
   57   57    1    1    1    1    1    1    1    1 -9.37745E+04 0.00034 
   58   58    1    1    1    1    1    1    1    1 -9.15858E+04 0.00034 
   59   59    1    1    1    1    1    1    1    1 -8.36768E+04 0.00035 
   60   60    1    1    1    1    1    1    1    1 -7.40379E+04 0.00036 
   61   61    1    1    1    1    1    1    1    1 -6.46496E+04 0.00032 
   62   62    1    1    1    1    1    1    1    1 -5.92332E+04 0.00033 
   63   63    1    1    1    1    1    1    1    1 -5.57631E+04 0.00036 
   64   64    1    1    1    1    1    1    1    1 -5.20414E+04 0.00034 
   65   65    1    1    1    1    1    1    1    1 -5.44682E+04 0.00035 
   66   66    1    1    1    1    1    1    1    1 -5.42187E+04 0.00037 
   67   67    1    1    1    1    1    1    1    1 -5.14537E+04 0.00034 
   68   68    1    1    1    1    1    1    1    1 -4.59823E+04 0.00034 
   69   69    1    1    1    1    1    1    1    1 -4.11350E+04 0.00035 
   70   70    1    1    1    1    1    1    1    1 -3.89080E+04 0.00035 
   71   71    1    1    1    1    1    1    1    1 -3.90131E+04 0.00033 
   72   72    1    1    1    1    1    1    1    1 -4.05444E+04 0.00034 
   73   73    1    1    1    1    1    1    1    1 -4.33685E+04 0.00035 
   74   74    1    1    1    1    1    1    1    1 -4.69353E+04 0.00035 
   75   75    1    1    1    1    1    1    1    1 -5.08253E+04 0.00035 
   76   76    1    1    1    1    1    1    1    1 -5.39446E+04 0.00034 
   77   77    1    1    1    1    1    1    1    1 -5.58884E+04 0.00037 
   78   78    1    1    1    1    1    1    1    1 -5.67503E+04 0.00036 
   79   79    1    1    1    1    1    1    1    1 -5.64731E+04 0.00034 
   80   80    1    1    1    1    1    1    1    1 -5.50787E+04 0.00036 
   81   81    1    1    1    1    1    1    1    1 -5.25870E+04 0.00034 
   82   82    1    1    1    1    1    1    1    1 -4.79280E+04 0.00033 
   83   83    1    1    1    1    1    1    1    1 -4.11500E+04 0.00035 
   84   84    1    1    1    1    1    1    1    1 -3.45182E+04 0.00035 
   85   85    1    1    1    1    1    1    1    1 -2.95604E+04 0.00035 
   86   86    1    1    1    1    1    1    1    1 -2.51476E+04 0.00035 
   87   87    1    1    1    1    1    1    1    1 -2.11127E+04 0.00036 
   88   88    1    1    1    1    1    1    1    1 -1.75524E+04 0.00035 
   89   89    1    1    1    1    1    1    1    1 -1.46313E+04 0.00035 
   90   90    1    1    1    1    1    1    1    1 -1.27073E+04 0.00035 
   91   91    1    1    1    1    1    1    1    1 -1.17711E+04 0.00036 
   92   92    1    1    1    1    1    1    1    1 -1.21351E+04 0.00035 
   93   93    1    1    1    1    1    1    1    1 -1.37669E+04 0.00035 
   94   94    1    1    1    1    1    1    1    1 -1.63279E+04 0.00034 
   95   95    1    1    1    1    1    1    1    1 -1.92409E+04 0.00034 
   96   96    1    1    1    1    1    1    1    1 -2.10910E+04 0.00035 
   97   97    1    1    1    1    1    1    1    1 -2.15695E+04 0.00035 
   98   98    1    1    1    1    1    1    1    1 -2.21215E+04 0.00035 
   99   99    1    1    1    1    1    1    1    1 -2.20355E+04 0.00036 
  100  100    1    1    1    1    1    1    1    1 -2.17879E+04 0.00035 
  101  101    1    1    1    1    1    1    1    1 -2.11509E+04 0.00036 
  102  102    1    1    1    1    1    1    1    1 -2.00105E+04 0.00036 
  103  103    1    1    1    1    1    1    1    1 -1.82975E+04 0.00034 
  104  104    1    1    1    1    1    1    1    1 -1.59522E+04 0.00036 
  105  105    1    1    1    1    1    1    1    1 -1.34398E+04 0.00035 
  106  106    1    1    1    1    1    1    1    1 -1.12707E+04 0.00036 
  107  107    1    1    1    1    1    1    1    1 -9.44520E+03 0.00034 
  108  108    1    1    1    1    1    1    1    1 -7.01123E+03 0.00037 
  109  109    1    1    1    1    1    1    1    1 -4.29435E+03 0.00037 
  110  110    1    1    1    1    1    1    1    1 -1.67553E+03 0.00035 
  111  111    1    1    1    1    1    1    1    1 -9.70160E+01 0.00083 
  112  112    1    1    1    1    1    1    1    1 -4.67513E-01 0.13307 
  113  113    1    1    1    1    1    1    1    1 -4.27220E-01 0.14986 
  114  114    1    1    1    1    1    1    1    1 -4.97337E-01 0.12958 
  115  115    1    1    1    1    1    1    1    1 -4.85793E-01 0.15057 
  116  116    1    1    1    1    1    1    1    1 -3.12278E-01 0.16306 
  117  117    1    1    1    1    1    1    1    1 -3.18202E-01 0.16064 
  118  118    1    1    1    1    1    1    1    1 -2.70004E-01 0.16493 
  119  119    1    1    1    1    1    1    1    1 -3.34639E-01 0.16106 
  120  120    1    1    1    1    1    1    1    1 -2.72824E-01 0.18281 
];


DETSteelNetSideSurfaceCurrentE = [
 0.00000E+00  1.00000E-01  5.00000E-02
 1.00000E-01  2.00000E-01  1.50000E-01
 2.00000E-01  3.00000E-01  2.50000E-01
 3.00000E-01  4.00000E-01  3.50000E-01
 4.00000E-01  5.00000E-01  4.50000E-01
 5.00000E-01  6.00000E-01  5.50000E-01
 6.00000E-01  7.00000E-01  6.50000E-01
 7.00000E-01  8.00000E-01  7.50000E-01
 8.00000E-01  9.00000E-01  8.50000E-01
 9.00000E-01  1.00000E+00  9.50000E-01
 1.00000E+00  1.10000E+00  1.05000E+00
 1.10000E+00  1.20000E+00  1.15000E+00
 1.20000E+00  1.30000E+00  1.25000E+00
 1.30000E+00  1.40000E+00  1.35000E+00
 1.40000E+00  1.50000E+00  1.45000E+00
 1.50000E+00  1.60000E+00  1.55000E+00
 1.60000E+00  1.70000E+00  1.65000E+00
 1.70000E+00  1.80000E+00  1.75000E+00
 1.80000E+00  1.90000E+00  1.85000E+00
 1.90000E+00  2.00000E+00  1.95000E+00
 2.00000E+00  2.10000E+00  2.05000E+00
 2.10000E+00  2.20000E+00  2.15000E+00
 2.20000E+00  2.30000E+00  2.25000E+00
 2.30000E+00  2.40000E+00  2.35000E+00
 2.40000E+00  2.50000E+00  2.45000E+00
 2.50000E+00  2.60000E+00  2.55000E+00
 2.60000E+00  2.70000E+00  2.65000E+00
 2.70000E+00  2.80000E+00  2.75000E+00
 2.80000E+00  2.90000E+00  2.85000E+00
 2.90000E+00  3.00000E+00  2.95000E+00
 3.00000E+00  3.10000E+00  3.05000E+00
 3.10000E+00  3.20000E+00  3.15000E+00
 3.20000E+00  3.30000E+00  3.25000E+00
 3.30000E+00  3.40000E+00  3.35000E+00
 3.40000E+00  3.50000E+00  3.45000E+00
 3.50000E+00  3.60000E+00  3.55000E+00
 3.60000E+00  3.70000E+00  3.65000E+00
 3.70000E+00  3.80000E+00  3.75000E+00
 3.80000E+00  3.90000E+00  3.85000E+00
 3.90000E+00  4.00000E+00  3.95000E+00
 4.00000E+00  4.10000E+00  4.05000E+00
 4.10000E+00  4.20000E+00  4.15000E+00
 4.20000E+00  4.30000E+00  4.25000E+00
 4.30000E+00  4.40000E+00  4.35000E+00
 4.40000E+00  4.50000E+00  4.45000E+00
 4.50000E+00  4.60000E+00  4.55000E+00
 4.60000E+00  4.70000E+00  4.65000E+00
 4.70000E+00  4.80000E+00  4.75000E+00
 4.80000E+00  4.90000E+00  4.85000E+00
 4.90000E+00  5.00000E+00  4.95000E+00
 5.00000E+00  5.10000E+00  5.05000E+00
 5.10000E+00  5.20000E+00  5.15000E+00
 5.20000E+00  5.30000E+00  5.25000E+00
 5.30000E+00  5.40000E+00  5.35000E+00
 5.40000E+00  5.50000E+00  5.45000E+00
 5.50000E+00  5.60000E+00  5.55000E+00
 5.60000E+00  5.70000E+00  5.65000E+00
 5.70000E+00  5.80000E+00  5.75000E+00
 5.80000E+00  5.90000E+00  5.85000E+00
 5.90000E+00  6.00000E+00  5.95000E+00
 6.00000E+00  6.10000E+00  6.05000E+00
 6.10000E+00  6.20000E+00  6.15000E+00
 6.20000E+00  6.30000E+00  6.25000E+00
 6.30000E+00  6.40000E+00  6.35000E+00
 6.40000E+00  6.50000E+00  6.45000E+00
 6.50000E+00  6.60000E+00  6.55000E+00
 6.60000E+00  6.70000E+00  6.65000E+00
 6.70000E+00  6.80000E+00  6.75000E+00
 6.80000E+00  6.90000E+00  6.85000E+00
 6.90000E+00  7.00000E+00  6.95000E+00
 7.00000E+00  7.10000E+00  7.05000E+00
 7.10000E+00  7.20000E+00  7.15000E+00
 7.20000E+00  7.30000E+00  7.25000E+00
 7.30000E+00  7.40000E+00  7.35000E+00
 7.40000E+00  7.50000E+00  7.45000E+00
 7.50000E+00  7.60000E+00  7.55000E+00
 7.60000E+00  7.70000E+00  7.65000E+00
 7.70000E+00  7.80000E+00  7.75000E+00
 7.80000E+00  7.90000E+00  7.85000E+00
 7.90000E+00  8.00000E+00  7.95000E+00
 8.00000E+00  8.10000E+00  8.05000E+00
 8.10000E+00  8.20000E+00  8.15000E+00
 8.20000E+00  8.30000E+00  8.25000E+00
 8.30000E+00  8.40000E+00  8.35000E+00
 8.40000E+00  8.50000E+00  8.45000E+00
 8.50000E+00  8.60000E+00  8.55000E+00
 8.60000E+00  8.70000E+00  8.65000E+00
 8.70000E+00  8.80000E+00  8.75000E+00
 8.80000E+00  8.90000E+00  8.85000E+00
 8.90000E+00  9.00000E+00  8.95000E+00
 9.00000E+00  9.10000E+00  9.05000E+00
 9.10000E+00  9.20000E+00  9.15000E+00
 9.20000E+00  9.30000E+00  9.25000E+00
 9.30000E+00  9.40000E+00  9.35000E+00
 9.40000E+00  9.50000E+00  9.45000E+00
 9.50000E+00  9.60000E+00  9.55000E+00
 9.60000E+00  9.70000E+00  9.65000E+00
 9.70000E+00  9.80000E+00  9.75000E+00
 9.80000E+00  9.90000E+00  9.85000E+00
 9.90000E+00  1.00000E+01  9.95000E+00
 1.00000E+01  1.01000E+01  1.00500E+01
 1.01000E+01  1.02000E+01  1.01500E+01
 1.02000E+01  1.03000E+01  1.02500E+01
 1.03000E+01  1.04000E+01  1.03500E+01
 1.04000E+01  1.05000E+01  1.04500E+01
 1.05000E+01  1.06000E+01  1.05500E+01
 1.06000E+01  1.07000E+01  1.06500E+01
 1.07000E+01  1.08000E+01  1.07500E+01
 1.08000E+01  1.09000E+01  1.08500E+01
 1.09000E+01  1.10000E+01  1.09500E+01
 1.10000E+01  1.11000E+01  1.10500E+01
 1.11000E+01  1.12000E+01  1.11500E+01
 1.12000E+01  1.13000E+01  1.12500E+01
 1.13000E+01  1.14000E+01  1.13500E+01
 1.14000E+01  1.15000E+01  1.14500E+01
 1.15000E+01  1.16000E+01  1.15500E+01
 1.16000E+01  1.17000E+01  1.16500E+01
 1.17000E+01  1.18000E+01  1.17500E+01
 1.18000E+01  1.19000E+01  1.18500E+01
 1.19000E+01  1.20000E+01  1.19500E+01
];

DETSourceNetSideSurfaceCurrent = [
    1    1    1    1    1    1    1    1    1    1 -2.81874E+04 0.00081 
    2    2    1    1    1    1    1    1    1    1 -1.03049E+05 0.00032 
    3    3    1    1    1    1    1    1    1    1 -1.02877E+05 0.00032 
    4    4    1    1    1    1    1    1    1    1 -1.04796E+05 0.00035 
    5    5    1    1    1    1    1    1    1    1 -1.09505E+05 0.00033 
    6    6    1    1    1    1    1    1    1    1 -1.09683E+05 0.00033 
    7    7    1    1    1    1    1    1    1    1 -9.86126E+04 0.00034 
    8    8    1    1    1    1    1    1    1    1 -9.81687E+04 0.00033 
    9    9    1    1    1    1    1    1    1    1 -8.55252E+04 0.00033 
   10   10    1    1    1    1    1    1    1    1 -7.40710E+04 0.00036 
   11   11    1    1    1    1    1    1    1    1 -6.67774E+04 0.00036 
   12   12    1    1    1    1    1    1    1    1 -6.22431E+04 0.00036 
   13   13    1    1    1    1    1    1    1    1 -5.84065E+04 0.00036 
   14   14    1    1    1    1    1    1    1    1 -5.40244E+04 0.00036 
   15   15    1    1    1    1    1    1    1    1 -4.99934E+04 0.00037 
   16   16    1    1    1    1    1    1    1    1 -4.59656E+04 0.00038 
   17   17    1    1    1    1    1    1    1    1 -4.46066E+04 0.00037 
   18   18    1    1    1    1    1    1    1    1 -4.79235E+04 0.00037 
   19   19    1    1    1    1    1    1    1    1 -5.66807E+04 0.00036 
   20   20    1    1    1    1    1    1    1    1 -6.18322E+04 0.00035 
   21   21    1    1    1    1    1    1    1    1 -6.45830E+04 0.00034 
   22   22    1    1    1    1    1    1    1    1 -6.72067E+04 0.00035 
   23   23    1    1    1    1    1    1    1    1 -6.82631E+04 0.00034 
   24   24    1    1    1    1    1    1    1    1 -6.78951E+04 0.00035 
   25   25    1    1    1    1    1    1    1    1 -6.78672E+04 0.00035 
   26   26    1    1    1    1    1    1    1    1 -6.87823E+04 0.00035 
   27   27    1    1    1    1    1    1    1    1 -7.30563E+04 0.00035 
   28   28    1    1    1    1    1    1    1    1 -7.58129E+04 0.00036 
   29   29    1    1    1    1    1    1    1    1 -8.55931E+04 0.00034 
   30   30    1    1    1    1    1    1    1    1 -1.01786E+05 0.00033 
   31   31    1    1    1    1    1    1    1    1 -1.19220E+05 0.00034 
   32   32    1    1    1    1    1    1    1    1 -1.33002E+05 0.00034 
   33   33    1    1    1    1    1    1    1    1 -1.36924E+05 0.00034 
   34   34    1    1    1    1    1    1    1    1 -1.26990E+05 0.00032 
   35   35    1    1    1    1    1    1    1    1 -1.18873E+05 0.00034 
   36   36    1    1    1    1    1    1    1    1 -1.13253E+05 0.00033 
   37   37    1    1    1    1    1    1    1    1 -1.09579E+05 0.00032 
   38   38    1    1    1    1    1    1    1    1 -1.06794E+05 0.00034 
   39   39    1    1    1    1    1    1    1    1 -1.04898E+05 0.00033 
   40   40    1    1    1    1    1    1    1    1 -1.03174E+05 0.00033 
   41   41    1    1    1    1    1    1    1    1 -1.02543E+05 0.00034 
   42   42    1    1    1    1    1    1    1    1 -1.02058E+05 0.00034 
   43   43    1    1    1    1    1    1    1    1 -1.01046E+05 0.00034 
   44   44    1    1    1    1    1    1    1    1 -1.00522E+05 0.00033 
   45   45    1    1    1    1    1    1    1    1 -1.01365E+05 0.00034 
   46   46    1    1    1    1    1    1    1    1 -1.02385E+05 0.00033 
   47   47    1    1    1    1    1    1    1    1 -1.04214E+05 0.00033 
   48   48    1    1    1    1    1    1    1    1 -1.07893E+05 0.00033 
   49   49    1    1    1    1    1    1    1    1 -1.11560E+05 0.00033 
   50   50    1    1    1    1    1    1    1    1 -1.14766E+05 0.00031 
   51   51    1    1    1    1    1    1    1    1 -1.11665E+05 0.00033 
   52   52    1    1    1    1    1    1    1    1 -1.10580E+05 0.00035 
   53   53    1    1    1    1    1    1    1    1 -1.08595E+05 0.00034 
   54   54    1    1    1    1    1    1    1    1 -1.05608E+05 0.00033 
   55   55    1    1    1    1    1    1    1    1 -9.99786E+04 0.00033 
   56   56    1    1    1    1    1    1    1    1 -9.70295E+04 0.00034 
   57   57    1    1    1    1    1    1    1    1 -9.85468E+04 0.00034 
   58   58    1    1    1    1    1    1    1    1 -9.63359E+04 0.00034 
   59   59    1    1    1    1    1    1    1    1 -8.81193E+04 0.00035 
   60   60    1    1    1    1    1    1    1    1 -7.79629E+04 0.00035 
   61   61    1    1    1    1    1    1    1    1 -6.79729E+04 0.00031 
   62   62    1    1    1    1    1    1    1    1 -6.21762E+04 0.00032 
   63   63    1    1    1    1    1    1    1    1 -5.85064E+04 0.00034 
   64   64    1    1    1    1    1    1    1    1 -5.45144E+04 0.00033 
   65   65    1    1    1    1    1    1    1    1 -5.71726E+04 0.00034 
   66   66    1    1    1    1    1    1    1    1 -5.70384E+04 0.00036 
   67   67    1    1    1    1    1    1    1    1 -5.41728E+04 0.00034 
   68   68    1    1    1    1    1    1    1    1 -4.83677E+04 0.00033 
   69   69    1    1    1    1    1    1    1    1 -4.31596E+04 0.00034 
   70   70    1    1    1    1    1    1    1    1 -4.07809E+04 0.00034 
   71   71    1    1    1    1    1    1    1    1 -4.08124E+04 0.00032 
   72   72    1    1    1    1    1    1    1    1 -4.24391E+04 0.00033 
   73   73    1    1    1    1    1    1    1    1 -4.54094E+04 0.00034 
   74   74    1    1    1    1    1    1    1    1 -4.92148E+04 0.00034 
   75   75    1    1    1    1    1    1    1    1 -5.33573E+04 0.00034 
   76   76    1    1    1    1    1    1    1    1 -5.67065E+04 0.00033 
   77   77    1    1    1    1    1    1    1    1 -5.88242E+04 0.00037 
   78   78    1    1    1    1    1    1    1    1 -5.97701E+04 0.00035 
   79   79    1    1    1    1    1    1    1    1 -5.95517E+04 0.00033 
   80   80    1    1    1    1    1    1    1    1 -5.81254E+04 0.00035 
   81   81    1    1    1    1    1    1    1    1 -5.55628E+04 0.00034 
   82   82    1    1    1    1    1    1    1    1 -5.06863E+04 0.00032 
   83   83    1    1    1    1    1    1    1    1 -4.34948E+04 0.00033 
   84   84    1    1    1    1    1    1    1    1 -3.65034E+04 0.00035 
   85   85    1    1    1    1    1    1    1    1 -3.12451E+04 0.00034 
   86   86    1    1    1    1    1    1    1    1 -2.65611E+04 0.00035 
   87   87    1    1    1    1    1    1    1    1 -2.22881E+04 0.00035 
   88   88    1    1    1    1    1    1    1    1 -1.85060E+04 0.00035 
   89   89    1    1    1    1    1    1    1    1 -1.53914E+04 0.00034 
   90   90    1    1    1    1    1    1    1    1 -1.33331E+04 0.00035 
   91   91    1    1    1    1    1    1    1    1 -1.23102E+04 0.00035 
   92   92    1    1    1    1    1    1    1    1 -1.26710E+04 0.00035 
   93   93    1    1    1    1    1    1    1    1 -1.43830E+04 0.00034 
   94   94    1    1    1    1    1    1    1    1 -1.70839E+04 0.00034 
   95   95    1    1    1    1    1    1    1    1 -2.01940E+04 0.00033 
   96   96    1    1    1    1    1    1    1    1 -2.21802E+04 0.00034 
   97   97    1    1    1    1    1    1    1    1 -2.26907E+04 0.00034 
   98   98    1    1    1    1    1    1    1    1 -2.32926E+04 0.00035 
   99   99    1    1    1    1    1    1    1    1 -2.32157E+04 0.00035 
  100  100    1    1    1    1    1    1    1    1 -2.29703E+04 0.00035 
  101  101    1    1    1    1    1    1    1    1 -2.23148E+04 0.00035 
  102  102    1    1    1    1    1    1    1    1 -2.11325E+04 0.00035 
  103  103    1    1    1    1    1    1    1    1 -1.93447E+04 0.00033 
  104  104    1    1    1    1    1    1    1    1 -1.68763E+04 0.00035 
  105  105    1    1    1    1    1    1    1    1 -1.42199E+04 0.00034 
  106  106    1    1    1    1    1    1    1    1 -1.19373E+04 0.00035 
  107  107    1    1    1    1    1    1    1    1 -1.00204E+04 0.00033 
  108  108    1    1    1    1    1    1    1    1 -7.45178E+03 0.00035 
  109  109    1    1    1    1    1    1    1    1 -4.57977E+03 0.00036 
  110  110    1    1    1    1    1    1    1    1 -1.79471E+03 0.00034 
  111  111    1    1    1    1    1    1    1    1 -1.03989E+02 0.00080 
  112  112    1    1    1    1    1    1    1    1 -4.62140E-01 0.13298 
  113  113    1    1    1    1    1    1    1    1 -4.36415E-01 0.14769 
  114  114    1    1    1    1    1    1    1    1 -5.44984E-01 0.12398 
  115  115    1    1    1    1    1    1    1    1 -5.31346E-01 0.14238 
  116  116    1    1    1    1    1    1    1    1 -3.39211E-01 0.15867 
  117  117    1    1    1    1    1    1    1    1 -3.44551E-01 0.15368 
  118  118    1    1    1    1    1    1    1    1 -2.80356E-01 0.16069 
  119  119    1    1    1    1    1    1    1    1 -3.48695E-01 0.15687 
  120  120    1    1    1    1    1    1    1    1 -2.78995E-01 0.17952 
];
Same task calculated with the MCNPX 2.7e ENDF-B/VII.0 showed the same neutron current on the surfaces. But the neutron balance is pretty different.

Code: Select all

      MCNPX Visual Editor Version X_25                                                     probid =   06/16/19 13:50:03

 neutron creation       tracks   weight        energy            neutron loss           tracks   weight        energy
                                 (per source particle)                                           (per source particle)

 source            10000000    1.0000E+00    4.5067E+00          escape            10260482    1.0200E+00    4.2327E+00
 nucl. interaction        0    0.            0.                  energy cutoff            0    0.            0.        
 particle decay           0    0.            0.                  time cutoff              0    0.            0.        
 weight window            0    0.            0.                  weight window            0    0.            0.        
 cell importance          0    0.            0.                  cell importance          0    0.            0.        
 weight cutoff            0    0.            0.                  weight cutoff            7    9.4951E-08    8.5605E-11
 energy importance        0    0.            0.                  energy importance        0    0.            0.        
 dxtran                   0    0.            0.                  dxtran                   0    0.            0.        
 forced collisions        0    0.            0.                  forced collisions        0    0.            0.        
 exp. transform           0    0.            0.                  exp. transform           0    0.            0.        
 upscattering             0    0.            2.3521E-15          downscattering           0    0.            1.7298E-01
 *photonuclear            0    0.            0.                  capture                  0    5.1782E-03    2.5749E-02
 (n,xn)              509564    4.9317E-02    6.2698E-02          loss to (n,xn)      254782    2.4659E-02    1.3874E-01
 prompt fission        7705    7.6441E-04    1.7659E-03          loss to fission       2005    1.9873E-04    9.8102E-04
 delayed fission          7    6.9223E-07    5.7866E-07          nucl. interaction        0    0.            0.        
 *prompt photofiss        0    0.            0.                  particle decay           0    0.            0.        
 tabular boundary         0    0.            0.                  tabular boundary         0    0.            0.        
 tabular sampling         0    0.            0.                                                                        
     total         10517276    1.0501E+00    4.5711E+00              total         10517276    1.0501E+00    4.5711E+00

   number of neutrons banked                  260489        average time of (shakes)              cutoffs
   neutron tracks per source particle     1.0517E+00          escape            1.2576E+02          tco   1.0000E+34
   neutron collisions per source particle 3.0433E-01          capture           5.8692E+01          eco   0.0000E+00
   total neutron collisions                  3043343          capture or escape 1.2542E+02          wc1  -5.0000E-01
   net multiplication              1.0252E+00 0.0000          any termination   1.2245E+02          wc2  -2.5000E-01

 computer time so far in this run     0.67 minutes            maximum number ever in bank         5
 computer time in mcrun               0.64 minutes            bank overflows to backup file       0
 source particles per minute            1.5688E+07            dynamic storage         0 words,          0 bytes.
 random numbers generated                127480902            most random numbers used was      178 in history  8966337

 range of sampled source weights = 1.0000E+00 to 1.0000E+00

 source efficiency = 0.6668  in cell     1
1source distribution frequency tables                                                                   print table 170

 the expected values below do not include the effect of the rejection loop which samples position.
- Igor

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Jaakko Leppänen
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Re: set power normalization

Post by Jaakko Leppänen » Tue Jun 18, 2019 1:53 pm

Serpent uses implicit (n,xn) by default, so even though these reactions are not shown in neutron balance, they appear in the weight balance. The treatment can be changed to analog using the set impl card.

Also note that the balance data refers to simulated particles and weight. Total source rate, fission rate, capture rate, etc. are normalized values.
- Jaakko

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