Changing the Temperature in an MCNP code

[Zakariya]

Hello everybody. I would like to ask a question;
if I change the dimensions and densities and the material number identifier ZAID to a specific temperature.
Does MCNP change automatically the volume of the cells? or I have to change the volume of each cell manually and indicate it in the cell cards?
Best.

 

[Alex A]

MCNP will always attempt to calculate the volume. I've found it to be sometimes unreliable, but that was in old versions of the code and may be a quirk of the order I entered cell dimensions in, or some other rule I broke.

If you have a volume override card (explicit divisor FD) then you will need to alter that manually. If you have a VOL data card you will need to alter that manually. If you have a VOL= as part of your cell card you will need to alter that manually.

I'm assuming you are just text editing the input file. If you are using a fancy editor with a high level representation of the objects anything is possible.

 

[Zakariya]

Thanks for your reply. I am using MCNP5 version, I change the volume of each cell manually. But when things get very complecated in determinating the volume of each cell ...