Re: Changing the geometry during the simulation

From: nikhil shetty <nikhil.nitk_at_gmail.com>
Date: Tue, 27 Aug 2013 16:24:43 +0200

It was a mistake by me to mention that the WHAT(6) of ASSIGNMAT for the
sample has to be VACUUM. Instead, WHAT(6) for the box should have been set
to VACUUM to score the activation from the sample (already set to uranium
carbonide) only.

So you are right that the parameter WHAT(6) for the box has to be set to
blackhole/vacuum to prevent the scoring from the box. I would suggest to
set it to vacuum as described here:
https://www.fluka.org/free_download/course/nea2013/Lectures/18_Activation.pdf
(see slides 22 and 23)

Cheers,
-Nikhil


On Tue, Aug 27, 2013 at 3:49 PM, Francesco Rossetto <
francesco.rossetto.3_at_studenti.unipd.it> wrote:

> **
> Thank you Nikhil! And what if I set the parameter WHAT(6) to blackhole for
> the box? This should prevent the activation of the box during the radiation
> period, right?
>
> Francesco
>
> Il 27/08/2013 13:52, nikhil shetty ha scritto:
>
> Hi Francesco,
>
> According to the FLUKA manual: "There is the possibility of selectively
> changing regions to vacuum/blackhole (and/or switching on/off possible
> fields) when transporting radioactive decay products."
> See WHAT(6) of the ASSIGNMAT card:
> http://www.fluka.org/fluka.php?id=man_onl&sub=10
>
> If you want to get the activation in the sample only, then you have to
> set the WHAT(6) of ASSIGNMAT card for the sample to be VACUUM.
>
> Cheers,
> -Nikhil
>
>
>
>
>
> On Tue, Aug 27, 2013 at 11:15 AM, Francesco Rossetto <
> francesco.rossetto.3_at_studenti.unipd.it> wrote:
>
>> Dear FLUKA experts,
>> I have a problem, I would like to perform a simulation of this system in
>> the following steps:
>>
>> - a proton beam hits an uranium carbonide sample for 14 days inside a
>> concrete environment;
>> - after this time the beam is switched off, and a progressive
>> measurement of the equivalent dose is performed during 14 days;
>> - after this time the sample is still radioactive, and is put in a
>> lead box, and the equivalent dose has to be scored.
>>
>> Using the activation cards, the two former steps were not a problem, but
>> the last one is something really tricky, since I have no idea if it's
>> possible to change the geometry of the environment during the simulation.
>> If it's not, is it possible, at least, to "save" the final composition of
>> the sample after the second step?
>>
>> Thank you so much
>>
>> Francesco
>>
>
>
>
Received on Tue Aug 27 2013 - 17:43:49 CEST

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