## Search found 12 matches

Thu May 03, 2018 7:44 pm
Forum: Users
Topic: 3D Geometry Axial Division
Replies: 9
Views: 1960

### Re: 3D Geometry Axial Division

It's probably first best to see whether you can reproduce the 2D results (more or less) in a 3D model. As I don't really know which kinds of results you obtained and which kinds of results you were expecting, I cannot comment on whether that could be due to the multi-physics interface. Fuel tempera...
Mon Apr 16, 2018 4:58 pm
Forum: Users
Topic: 3D Geometry Axial Division
Replies: 9
Views: 1960

### Re: 3D Geometry Axially Division

With two axial layers you should get the same radial burnup distribution in both layers (if the system is otherwise axially homogeneous). If you are simply interested in self-shielding and the rim-effect, have you considered doing 2D calculations? -Ville I am already done with the 2D calculations, ...
Sat Apr 14, 2018 1:53 am
Forum: Users
Topic: 3D Geometry Axial Division
Replies: 9
Views: 1960

### Re: 3D Geometry Axially Division

3D burnup calculations are always tricky, because large systems may be subject to numerical instabilities . Have you checked how the axial power distribution behaves as function of burnup? Thank you for your answer. I havent ( Is it done by setting detectors?) However, I have checked the radial bur...
Sat Apr 14, 2018 1:38 am
Forum: Users
Topic: 3D Geometry Axial Division
Replies: 9
Views: 1960

### Re: 3D Geometry Axially Division

This might also be due to the fact that assuming a cosine axial shape for the flux, the absorber should deplete first from the middle of the axial height due to the higher flux there. When you use 1 or 2 axial zones, the difference in flux level between the middle part and the ends cannot be reflec...
Tue Apr 10, 2018 12:37 am
Forum: Users
Topic: 3D Geometry Axial Division
Replies: 9
Views: 1960

### 3D Geometry Axial Division

Hello, I am studying the criticality and isotopic composition of a PWR assembly with integrated neutron absorber rods. I tried dividing the rods containing neutron absorber into several axial layers ( + 10 Radial Layers). When taking the K-eff values for each case I've gotten the attached plot. I ca...
Wed Mar 07, 2018 12:41 am
Forum: Users
Topic: Cell Division
Replies: 5
Views: 1782

### Re: Cell Division

You should have "burn 1" for any material included in the div cards. Hello Mr.Jaakko, I need to ask about the option " Sep #" in the division card. I cant understand the concept of geometry levels. For example, If I have 10 cells for one materials divided into 5 layers, when I use the option "sep 0...
Thu Feb 08, 2018 8:18 pm
Forum: Users
Topic: Set an isotope to equilibrium state
Replies: 2
Views: 998

### Re: Set an isotope to equilibrium state

Thank you. I thought it "Set () 1" is fixed for xenon only. I have another question. I am not sure its "Serpent" related or not. If I have power density equal to ( 108 MW/m3 ) for a 2D assembly fueled with low enriched uranium. I can change it to ( kw/g) By ( only) dividing it by fissile material de...
Wed Feb 07, 2018 9:47 pm
Forum: Users
Topic: Set an isotope to equilibrium state
Replies: 2
Views: 998

### Set an isotope to equilibrium state

Hello,

I have a question regarding setting a specific isotope into Equilibrium state ( Poisoned state specifically).

I already had it done for Xe, but I dont know how to do it for Sm-149.

Regards,
Reem
Wed Feb 07, 2018 9:37 pm
Forum: Development
Topic: Equilibrium xenon in decay steps
Replies: 12
Views: 6179

### Re: Equilibrium xenon in decay steps

Hello Jaakko. I have task to calculate the group constant generation for VVER-1000. Also, I do not have much experience in this type of simulations. In my case, I have the list of burnup points (for example, 1, 2, 3, 4, 5, 10, 20, 30). I need to calculate the branch with follow conditions: 1. Coola...
Thu Dec 21, 2017 12:17 pm
Forum: Users
Topic: Cell Division
Replies: 5
Views: 1782

### Re: Cell Division

http://serpent.vtt.fi/mediawiki/index.p ... al_volumes[/quote]

Yes, this is what I mean.
Can I use "cell-Div" for 2D Tasks?
And If I am dividing a cell ( + Neutron absorber) into ( For example ) 5 layers, I still should use the "Burn 10" option?