Search found 16 matches

by drvcj
Wed Oct 25, 2017 3:23 am
Forum: Parallelization
Topic: MPI run does not stop using Torque
Replies: 6
Views: 1356

Re: MPI run does not stop using Torque

Thanks for the explanation. I compiled Serpent 2 with the following option # GNU Compiler: CC = gcc CFLAGS = -Wall -ansi -ffast-math -O3 LDFLAGS = -lm # Parallel calculation using Open MP: CFLAGS += -DOPEN_MP CFLAGS += -fopenmp LDFLAGS += -fopenmp # This is needed in newer gcc versions to supress so...
by drvcj
Sat Oct 21, 2017 6:36 pm
Forum: Parallelization
Topic: MPI run does not stop using Torque
Replies: 6
Views: 1356

Re: MPI run does not stop using Torque

Hi, Here is the run time log. ------------------------------------------------------------ Serpent 2.1.29 -- Static criticality source simulation Title: "DLFR-Core" Active cycle 500 / 500 Source neutrons : 7981 Running time : 6:30:02 Estimated running time : 6:30:02 Estimated running time left : 0:0...
by drvcj
Sat Oct 21, 2017 7:00 am
Forum: Parallelization
Topic: MPI run does not stop using Torque
Replies: 6
Views: 1356

Re: MPI run does not stop using Torque

In the .out file, it is: Isotopic composition (non-zero densities): ------------------------------------------------------------------- Nuclide a. weight temp a. dens a. frac m. frac ------------------------------------------------------------------- 6012.12c 11.99999 1200.0 3.13749E-05 3.54948E-04 ...
by drvcj
Wed Oct 18, 2017 3:23 am
Forum: Parallelization
Topic: MPI run does not stop using Torque
Replies: 6
Views: 1356

MPI run does not stop using Torque

Our cluster use Torque/Maui for workload management but I'm not if this is relevant or not. The issue is Serpent MPI calculation does not stop on completion automatically. It just keep running without producing any new results or updating output files. I'm running Serpent 2.1.29 and the MPI executab...
by drvcj
Sat Mar 05, 2016 6:55 pm
Forum: Users
Topic: Serpent using homogenized macro cross sections
Replies: 1
Views: 2158

Serpent using homogenized macro cross sections

I intended to do Serpent calculations using few-group homogenized cross sections, which were generated from some transport lattice calculations. These cross sections were homogenized over the following regions: fuel+cladding, moderator, reflector, control rod etc. If one is familiar with the C5G7 be...
by drvcj
Wed May 28, 2014 8:13 am
Forum: Users
Topic: Duplicates in material
Replies: 9
Views: 2395

Re: Duplicates in material

The model has 112 material zones in total and I used the default setting for unionized grid. I also tried to disable this option, but it was not successful. Later on, I switched to Serpent 1. The simulation actually finished and produced reasonable results, although the computational time is long. F...
by drvcj
Sat May 24, 2014 6:12 am
Forum: Users
Topic: Duplicates in material
Replies: 9
Views: 2395

Re: Duplicates in material

Hey Jaakko, So now all the nuclides are at the same temperature (900 K) but the calculation still isn't successful. It was paused at the phase of "Allocating memory for particle structures...", and was killed later for time out. Here is the summary of the job: - 350 transport nuclides - 759 decay nu...
by drvcj
Thu May 22, 2014 8:16 pm
Forum: Users
Topic: Duplicates in material
Replies: 9
Views: 2395

Re: Duplicates in material

The case I referred to here is a SFR whole core model using homogeneous material for each assembly. That's the reason that the Doppler-broadening is not employed, instead, different temperature is assigned to nuclides belonging to different regions in the corresponding heterogeneous model.
by drvcj
Wed May 21, 2014 9:12 pm
Forum: Users
Topic: Duplicates in material
Replies: 9
Views: 2395

Re: Duplicates in material

Thanks, Jaakko. It makes a lot of sense to me. I do have different IDs for same nuclides in the initial composition, as I'd like to take the temperature distribution into account. But later on, I found that the calculation actually stopped due to insufficient memory, even after the optimization opti...
by drvcj
Tue May 20, 2014 8:37 pm
Forum: Users
Topic: Duplicates in material
Replies: 9
Views: 2395

Duplicates in material

Hi there, I'm performing the burnup analysis of a reactor core, which is in R-Z geometry with 7 axial planes and 16 rings in each plane. For each burn material, the following warning messages show up: ***** Mon May 19 23:59:40 2014 (seed = 1400568891, MPI task = 1) Warning message from function Burn...