Search found 508 matches

by Ana Jambrina
Mon Sep 27, 2021 10:06 pm
Forum: Users
Topic: How to get external source?
Replies: 39
Views: 21525

Re: How to get external source?

Have you tracked the calculation in terms of splitting/rejection/etc.? Have you checked the mesh resolution? Have you added a bounding box to improve the source sampling efficiency? How did you define the detector? - this behaviour might be a consequence of a low sampling efficiency. Could you post ...
by Ana Jambrina
Mon Sep 27, 2021 8:47 pm
Forum: Users
Topic: How to get external source?
Replies: 39
Views: 21525

Re: How to get external source?

Could you describe in more detail the (input) calculation and/or post here the input?
by Ana Jambrina
Sun Sep 26, 2021 7:50 pm
Forum: Users
Topic: Fatal Error: Composition not sorted
Replies: 8
Views: 1274

Re: Fatal Error: Composition not sorted

As Luke pointed out, the problem might derive from not converting the isotope symbol/string to ZAI (or vice-versa) within the MSR-routines. Thus, Serpent interprets them as different isotopes, not finding them within the transmutation paths/listed nuclides.
by Ana Jambrina
Sat Sep 25, 2021 12:22 pm
Forum: Users
Topic: Fatal error in function DetectorOutput
Replies: 1
Views: 28

Re: Fatal error in function DetectorOutput

Could you describe in more detail the input/calculation/error output? Or post here the input? Which Serpent version are you running? Note: e.g., you can simply place a mesh detector discretising the axial direction to obtain flux estimates at the listed positions on top of whatever defined (spatial)...
by Ana Jambrina
Fri Sep 24, 2021 2:17 pm
Forum: Bugs, problems, questions & feeback
Topic: Fatal error in function SurfaceNormal: Unsupported surface type 12
Replies: 3
Views: 35

Re: Fatal error in function SurfaceNormal: Unsupported surface type 12

If the input/calculation triggers that error, the 'CUBOID' surface type (15) might not work either. - Which Serpent version are you running?
Note: you can take a look at the routine 'surfacenormal.c' and check the surface's types where the normal vector is evaluated.
by Ana Jambrina
Fri Sep 24, 2021 11:50 am
Forum: Bugs, problems, questions & feeback
Topic: Fatal error in function SurfaceNormal: Unsupported surface type 12
Replies: 3
Views: 35

Re: Fatal error in function SurfaceNormal: Unsupported surface type 12

Routine 'surfacenormal.c' evaluates the normal vector for a given surface at (x,y,z). Currently, it doesn't include all surfaces available in Serpent (for multiple reasons). Surface type 12 corresponds with the 'CUBE' type definition. Meaning, you have a surface defined as a 'CUBE' type and, Serpent...
by Ana Jambrina
Tue Sep 21, 2021 6:22 pm
Forum: Users
Topic: flux calculation
Replies: 3
Views: 75

Re: flux calculation

Yes, instead of post-processing the estimates, you can use the volume detector entry ‘ dv ’. However, keep in mind that such option is only valid for constant bin-volume, e.g. not applicable for curvilinear mesh detectors where the division is based on equal radii, not equal volume. Note: the comman...
by Ana Jambrina
Mon Sep 20, 2021 7:24 pm
Forum: Users
Topic: flux calculation
Replies: 3
Views: 75

Re: flux calculation

The detector gives you the flux integrated over space/energy/direction (and time). To obtain the neutron averaged-flux [n/cm^2 s] you should divide by bin-volume corresponding to the integration spatial-domain: determined by the material detector ‘ dm ’ fuelPIN1/fuelPIN2/fuelPIN3 and refined and dis...
by Ana Jambrina
Thu Sep 16, 2021 3:21 pm
Forum: Methods
Topic: Calculate the scattering matrix using detectors
Replies: 3
Views: 61

Re: Calculate the scattering matrix using detectors

Here, some useful references in spatial homogenisation and group constant generation: - Overview of methodology for spatial homogenization in the Serpent 2 Monte Carlo code - Tutorial. Part 6: Generating a set of group constants for a fuel assembly - Practicalities of group constant generation metho...
by Ana Jambrina
Thu Sep 16, 2021 2:22 pm
Forum: Methods
Topic: Calculate the scattering matrix using detectors
Replies: 3
Views: 61

Re: Calculate the scattering matrix using detectors

Why don't you check the group constant generation option, 'set gcu'?