Search found 428 matches

by Ville Valtavirta
Tue Apr 27, 2021 10:35 am
Forum: Users
Topic: Odd detector heating outputs
Replies: 5
Views: 88

Re: Odd detector heating outputs

The "dm" option in detectors allows you to only score interactions happening in a certain material.

-Ville
by Ville Valtavirta
Wed Apr 21, 2021 1:03 pm
Forum: Users
Topic: External source mode in subcritical reactor
Replies: 10
Views: 554

Re: External source mode in subcritical reactor

Hi,

You are tallying both the neutron flux and photon flux here. Do they both show a difference between Serpent and MCNP/OpenMC or only one of them?

Do you use the same normalization for all codes?

-Ville
by Ville Valtavirta
Thu Apr 15, 2021 8:58 am
Forum: Users
Topic: Burnup problem detector flux normalization?
Replies: 2
Views: 104

Re: Burnup problem detector flux normalization?

Hi, You can only set one flux normalization at a time. If you want to set the power level of your system for burnup purposes your detector output will correspond to normalization at that power level as Ana described. If you want to have detector results per unit source rate when fixing the system po...
by Ville Valtavirta
Fri Mar 19, 2021 4:01 pm
Forum: Development
Topic: 2.1.32 - Sensitivity calculation and uncertainty propagation
Replies: 3
Views: 172

Re: 2.1.32 - Sensitivity calculation and uncertainty propagation

Hi Nicolas, we don't distribute covariance data with Serpent at the moment. Generally, NJOY can be used to produce evaluated covariance data files as Ana noted. You would still need to convert those into some format supported by Serpent, e.g. the new ASCII-form. And yes, COVERX format is the one use...
by Ville Valtavirta
Fri Feb 26, 2021 3:56 pm
Forum: Development
Topic: 2.1.32 - Sensitivity calculation and uncertainty propagation
Replies: 3
Views: 172

2.1.32 - Sensitivity calculation and uncertainty propagation

Hi everyone, the sensitivity calculation and uncertainty propagation capabilities saw some fixed bugs and minor improvements in 2.1.32. I'll try to list the main ones in this topic, and update any new features to the Serpent Wiki in the near future. We have an enthusiastic S/U community using the ca...
by Ville Valtavirta
Fri Feb 26, 2021 2:58 pm
Forum: Development
Topic: "Branching" geometry
Replies: 1
Views: 104

Re: "Branching" geometry

Hi, I think it's an interesting idea and could certainly be useful in some situations. I think adding support on such a branching geometry in the transport simulation itself might require quite extensive changes, however. I think currently the best approach to achieve something similar would be to s...
by Ville Valtavirta
Wed Feb 17, 2021 10:45 am
Forum: Users
Topic: Information about FINIX, SuperFINIX and Kraken
Replies: 2
Views: 184

Re: Information about FINIX, SuperFINIX and Kraken

Hi Christian, it is possible to use the internal coupling between Serpent and FINIX at a level of multiple rods. See e.g. this BWR assembly example . It is also true that at core level we nowadays rely on coupling with SuperFINIX in the context of the Kraken framework, which leaves Serpent free of m...
by Ville Valtavirta
Mon Jan 18, 2021 12:56 pm
Forum: Users
Topic: Material Card Syntax
Replies: 3
Views: 168

Re: Material Card Syntax

Hi,

it may be a good idea to go through the Tutorial. The nuclide identifiers are explained there along with many other input related things.

-Ville
by Ville Valtavirta
Fri Jan 15, 2021 10:26 am
Forum: Users
Topic: Serpent limits for a subcritical installation
Replies: 2
Views: 203

Re: Serpent limits for a subcritical installation

Hi, as always, I recommend doing an initial verification and validation between Serpent and some experimental measurements to assess the level of similarity in the computational model and the actual system to be modelled. That said, I think if you use the external source simulation mode for the calc...
by Ville Valtavirta
Fri Jan 08, 2021 10:56 am
Forum: Compiling and installing Serpent
Topic: Is there a significant advantage to 128 GB of RAM over 64 for depletion calculations?
Replies: 3
Views: 250

Re: Is there a significant advantage to 128 GB of RAM over 64 for depletion calculations?

Hi, the memory demand is quite case dependent so it's difficult to say anything about a specific applications without simply running some tests. Having more memory can help you fit the whole calculation in memory using one of the higher optimization modes, which will make the whole calculation faste...