RE: [fluka-discuss]: Fluka lattice

From: Fasso, Alberto <>
Date: Mon, 8 Sep 2014 07:46:06 +0000

Please keep the discussion on the list.

2 cm is not very small compared to the likely attenuation length, therefore the approximation I suggested (a material of average density)
is not acceptable.
Of course you can use the LATTICE option: but if each cylinder has a random position and orientation it is probably difficult to
avoid overlapping them with each other. In MCNP, I guess, you would have a similar problem.


From: sanjay andola <>
Sent: Sunday, September 7, 2014 10:27 PM
To: Fasso, Alberto
Subject: Re: [fluka-discuss]: Fluka lattice

1 mts long 40 cm dia drum is half filled with the small 2 cm cylindrical chunks of SS. chunks can be taken as cylinders. can it be done like in MCNP in with lattice card or i have to take individual chunk geometry?


On Sat, Sep 6, 2014 at 2:33 PM, Fasso, Alberto <<>> wrote:
Dear Sanjay,

can you be a little more specific?
- How large is the "large number of chunks"? Hundreds? Thousands? Millions?
- Have they all the same shape? Is it a simple shape?
- How small are the "small pieces?", with respect to the size of the drum?
If the number of the pieces is very large, and they are much smaller than the drum, and if the only thing you are interested in is the neutron attenuation, you can define a material of average density, for instance by defining a COMPOUND made of air and metal.


From:<> <<>> on behalf of sanjay andola <<>>
Sent: Friday, September 5, 2014 11:16 PM
Subject: [fluka-discuss]: Fluka lattice

Dear all
           I want to simulate a number of small pieces of metal chunks enclosed in a drum. the Drum is half filled with such type of material, this geometry to see the neutron attenuation due to this material.
 do i have to create such large number of chunks or i can do this with the lattice card?

Thanks in advance

Thank & Regards
Sanjay C Andola
Scientific Officer C
Applied Physics Division
BARC Trombay
Mumbai 400085
Received on Mon Sep 08 2014 - 11:26:59 CEST

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