Search found 88 matches

by gavin.ridley.utk
Fri Nov 09, 2018 10:03 pm
Forum: Bugs, problems, questions & feeback
Topic: Input error: Continuous S(a,b) format not supported
Replies: 9
Views: 936

Re: Input error: Continuous S(a,b) format not supported

As a followup to this, Dr. Leppanen, do you remember the number of NJOY THERMR "icoh" bins and number of discrete cosines used to generate the S(a,b) data distributed with Serpent 1? I've tried to match lwe6.00t k_eff values for a pin cell problem and found the following: nbins | keff +/- sigma ----...
by gavin.ridley.utk
Tue Nov 06, 2018 6:31 pm
Forum: Serpent 2 scalability benchmark
Topic: Test case 2: PWR full-core calculation
Replies: 5
Views: 3360

Re: Test case 2: PWR full-core calculation

Hi,

Is the input for this still available? I'd like to test it on our cluster.

Thanks,
by gavin.ridley.utk
Thu Nov 01, 2018 1:50 am
Forum: Parallelization
Topic: Some thoughts on load balancing...
Replies: 1
Views: 1853

Re: Some thoughts on load balancing...

Are you referring to Paul Romano's PhD thesis in terms of the decentralized communications?
by gavin.ridley.utk
Thu Nov 01, 2018 1:46 am
Forum: Bugs, problems, questions & feeback
Topic: Input error: Continuous S(a,b) format not supported
Replies: 9
Views: 936

Re: Input error: Continuous S(a,b) format not supported

Thanks very much Dr. Leppänen. As a note for anyone else running into this, you can obtain S(a,b) in the serpent-compatible format by specifying iwt=1 in card 9 of the ACER sequence.
by gavin.ridley.utk
Tue Oct 30, 2018 4:15 pm
Forum: Bugs, problems, questions & feeback
Topic: Input error: Continuous S(a,b) format not supported
Replies: 9
Views: 936

Input error: Continuous S(a,b) format not supported

Hi all, I was hoping to try out some of the new ENDF/B-VIII S(a,b) data but it seems Serpent doesn't support it, giving: Input error: Continuous S(a,b) format not supported Is there any preprocessing of this data that has to be done? Or is using this just not really an option now? Thanks very much,
by gavin.ridley.utk
Wed Sep 26, 2018 7:50 pm
Forum: Bugs, problems, questions & feeback
Topic: Anyone test on different MPI implementations?
Replies: 3
Views: 1407

Anyone test on different MPI implementations?

Hi all, I've read that different MPI implementations can have different performance depending on the application, e.g., https://pdfs.semanticscholar.org/d851/6c19f0756c5174b06dcc80ac3faabfcd7971.pdf . Has anyone compared open MPI, MPICH, MVAPICH, etc? It'd be nice to know which is best to pick when ...
by gavin.ridley.utk
Fri Jun 29, 2018 5:05 pm
Forum: Gamma transport
Topic: Anyone test in 2.1.30 yet?
Replies: 9
Views: 3327

Re: Anyone test in 2.1.30 yet?

Ville, I tremendously appreciate your guidance! Thank you kindly for the prompt reply.
by gavin.ridley.utk
Fri Jun 29, 2018 2:39 am
Forum: Bugs, problems, questions & feeback
Topic: Anomalously high dr -8 output
Replies: 2
Views: 1247

Anomalously high dr -8 output

Hi, I'm trying to calculate heat deposition fractions in a simple geometry using the dr -4 and dr -8 response functions. From what I understand, dr -4 includes all neutron-driven reactions that produce heat, including fission and captures. dr -8 should be just fissions, and thus always less than dr ...
by gavin.ridley.utk
Thu Jun 28, 2018 6:56 pm
Forum: Gamma transport
Topic: Anyone test in 2.1.30 yet?
Replies: 9
Views: 3327

Re: Anyone test in 2.1.30 yet?

Hi Toni, Thanks for this tip. Serpent tells me that the material must be void in order to use the -12 MT for photons. Why is that? The heating should be zero in void, so this confuses me. One more question: it appears that in using the photon transport mode, my "fuel" material seems to be renamed in...