Search found 386 matches

by Ville Valtavirta
Tue Jun 09, 2020 12:58 pm
Forum: Users
Topic: Detector reading
Replies: 8
Views: 415

Re: Detector reading

If I wanted to get detector results at full power at 490 days I would simply do dep daytot 50.000 -> index 1 100.000 -> index 2 150.000 -> index 3 200.000 -> index 4 300.000 -> index 5 400.000 -> index 6 490.000 -> index 7 set power 1e-10 dep daytot -> index 8 511.00 and simply scale the detector re...
by Ville Valtavirta
Tue Jun 09, 2020 12:55 pm
Forum: Compiling and installing Serpent
Topic: Newbie- Installation Serpent2 on macOS Catalina 10.15.5
Replies: 6
Views: 265

Re: Newbie- Installation Serpent2 on macOS Catalina 10.15.5

Hi,

just to note, I don't think you want to compile it with MPI if you are simply running it on a single computer. It is better to use OpenMP parallelization on a single computer.

MPI is better suited for simulations on supercomputers or computing clusters.

-Ville
by Ville Valtavirta
Mon Jun 08, 2020 10:37 am
Forum: Input
Topic: Writing source files
Replies: 14
Views: 4847

Re: Writing source files

I think a few should be OK,

that will just mean that a couple of particles should have been included in the source multiple times, but I don't think you'll see an effect on the transient simulation.

-Ville
by Ville Valtavirta
Mon Jun 08, 2020 10:08 am
Forum: Users
Topic: Detector reading
Replies: 8
Views: 415

Re: Detector reading

Hi, the way you specify your depletion history means that you are using one power until 490 days and then the total power of 0.0 from 490 days to 511 days. Serpent evaluates the neutronics solution for 490 days as the starting point for the depletion interval between 490 and 511 days and since the p...
by Ville Valtavirta
Mon Jun 08, 2020 9:56 am
Forum: Compiling and installing Serpent
Topic: Newbie- Installation Serpent2 on macOS Catalina 10.15.5
Replies: 6
Views: 265

Re: Newbie- Installation Serpent2 on macOS Catalina 10.15.5

Hi, I'm not an expert on macOS, but it seems that since your error is coming from the "clang" compiler, you are not actually using gcc 9.3.0 to compile Serpent. You can try changing the CC = gcc line in Serpent's Makefile to CC = <path-to-your-gcc-9.3.0-compiler> where you set the direct path to the...
by Ville Valtavirta
Wed Mar 11, 2020 11:52 am
Forum: Users
Topic: Detector reading
Replies: 8
Views: 415

Re: Detector reading

I'm sorry, why are you not actually using decay mode for the simulation?

If you explicitly want to do burnup instead of decay, I would advice using a very low power instead of zero. I.e. something like 1e-6 Watt.

-Ville
by Ville Valtavirta
Mon Mar 09, 2020 10:55 am
Forum: Users
Topic: Cross-section generation questions
Replies: 1
Views: 201

Re: Cross-section generation questions

Hi Vince, Serpent does the group constant generation on universe basis, which means that you can get material-wise homogenized group constants by specifying different materials as different universes. The most simple approach would probably be to create an inf surface and create separate infinite ce...
by Ville Valtavirta
Mon Mar 09, 2020 10:47 am
Forum: Users
Topic: Fatal Error: Insufficient Buffer size
Replies: 7
Views: 521

Re: Fatal Error: Insufficient Buffer size

Hi, I think currently "set dynsrc" automatically switch the emission of delayed neutrons from precursors on so you will probably still have delayed neutrons and Serpent will still track the delayed neutron precursors that were present in the beginning of the simulation. Currently using set dynsrc .....
by Ville Valtavirta
Thu Feb 27, 2020 2:25 pm
Forum: Users
Topic: Fatal Error: Insufficient Buffer size
Replies: 7
Views: 521

Re: Fatal Error: Insufficient Buffer size

This printout is not really alarming.

Can you try simulating a single time-interval of a smaller length (e.g. 1e-5 seconds) and then slowly move to longer simulation times once everything works with a short time.

-Ville
by Ville Valtavirta
Tue Feb 25, 2020 11:43 am
Forum: Bugs, problems, questions & feeback
Topic: Time dependence in external source
Replies: 13
Views: 3254

Re: Time dependence in external source

It works but not for multiple energy groups. I had an option in the Matlab code to generate 'm' number of point sources with different energies at the same location. And when I do that, I'm back to the same problem :( Sorry, I'm not sure I understand, which problem? Could you tell more about what y...