Search found 381 matches

by Ville Valtavirta
Fri Oct 11, 2019 4:24 pm
Forum: Users
Topic: Source Biasing
Replies: 1
Views: 212

Re: Source Biasing

Hi,

might this be of help: http://serpent.vtt.fi/mediawiki/index.p ... on_example

The other examples on the page also shed light on the variance reduction capabilities of Serpent.

-Ville
by Ville Valtavirta
Fri Oct 04, 2019 2:34 pm
Forum: Users
Topic: More than 10,000,000 bins for a detector
Replies: 20
Views: 1409

Re: More than 10,000,000 bins for a detector

Hi, information about the CPU usage and memory consumption are automatically printed to the [input]_res.m file: % Running times: TOT_CPU_TIME (idx, 1) = 9.25542E+00 ; RUNNING_TIME (idx, 1) = 1.18702E+00 ; INIT_TIME (idx, [1: 2]) = [ 3.69333E-02 3.69333E-02 ]; PROCESS_TIME (idx, [1: 2]) = [ 1.10000E-...
by Ville Valtavirta
Wed Oct 02, 2019 8:58 am
Forum: Users
Topic: More than 10,000,000 bins for a detector
Replies: 20
Views: 1409

Re: More than 10,000,000 bins for a detector

This is most likely just a sanity check meant to catch insanely large values. It should be OK to increase the value manually.

-Ville
by Ville Valtavirta
Mon Aug 05, 2019 12:37 pm
Forum: Users
Topic: individual boundary conditions for half core calculation
Replies: 5
Views: 996

Re: individual boundary conditions for half core calculation

Hi all, using "set usym" with the OPT being set to 1 affects limits neutron tracking to the symmetry sector. This means that things like detectors, depletion and other spatially distributed scores are affected. I think the most consistent way would be to define only the part of the geometry in the s...
by Ville Valtavirta
Wed Jul 31, 2019 5:25 pm
Forum: Manual
Topic: soluble absorber in serpent 2
Replies: 11
Views: 972

Re: soluble absorber in serpent 2

Hi, you can specify which materials are included in the boron iteration (see the input manual). This will allow you to only iterate the boron atomic density in coolant/moderator. A minimal working input for boron iteration in a single material case is here: set title "Infinite LWR-like system iterat...
by Ville Valtavirta
Tue Jul 30, 2019 5:32 pm
Forum: Users
Topic: Hydrogen in Zirconium Hydride and Water with S(a,b) for IFC
Replies: 11
Views: 1034

Re: Hydrogen in Zirconium Hydride and Water with S(a,b) for IFC

Hi Christian, I can reproduce the problem. It seems to appear when on-the-fly interpolation is used for the thermal scattering libraries of zirconium in zirconium hydride. The problem seems to occur regardless of whether the ZrH data is linked to the zirconium or the hydrogen, so the problem is in t...
by Ville Valtavirta
Thu Jul 04, 2019 11:46 am
Forum: Bugs, problems, questions & feeback
Topic: Fatal Error in MoveST
Replies: 2
Views: 291

Re: Fatal Error in MoveST

This does sound like there might be something strange/wrong with the model. Basically the warning says that Serpent has transported a neutron from place A to place B using surface tracking and Serpent thinks that there should not be a surface between places A and B. However, upon checking Serpent se...
by Ville Valtavirta
Thu Jul 04, 2019 11:38 am
Forum: Users
Topic: XGPT warning: GetSensEventType
Replies: 4
Views: 378

Re: XGPT warning: GetSensEventType

And this one related to output of energy integrated sensitivities: viewtopic.php?f=25&t=3155&p=9887#p9887

-Ville
by Ville Valtavirta
Thu Jul 04, 2019 11:37 am
Forum: Bugs, problems, questions & feeback
Topic: Bugs in version 2.1.31
Replies: 13
Views: 1335

Re: Bugs in version 2.1.31

A bug related to the output of energy integrated sensitivities has been identified in Serpent 2.1.31. For a simple fix, the lines 100-125 from writesensresult.c have to be changed from /* First loop is over materials (skip first, which is "not found") */ for (imat = 1; imat < nmat; imat++) { /* Seco...
by Ville Valtavirta
Thu Jul 04, 2019 11:34 am
Forum: Users
Topic: XGPT warning: GetSensEventType
Replies: 4
Views: 378

Re: XGPT warning: GetSensEventType

See also this bug related to custom perturbations in 2.1.31 and its fix: viewtopic.php?f=25&t=3155&p=9885#p9885

-Ville