MCNP6.2 - How to plot normalized tallies with MCNP6.2?

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Discussion Overview

The discussion revolves around plotting normalized tallies using MCNP6.2, specifically focusing on tallies F2, F4, and F6. Participants explore tools and methods for normalization and plotting, including the use of MCPLOT and potential alternatives like Python or MATLAB.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant seeks recommendations for tools to plot tallies and inquires about normalizing tallies using MCPLOT.
  • Another suggests using the FM multiplier subcard in the input program to process data directly for plotting.
  • A participant questions whether the FM card can accept continuously updated parameters like k_eff for normalization, or if it can only handle constant values.
  • One participant asks about plotting "time based" tallies, indicating a potential area of interest or complexity in the discussion.

Areas of Agreement / Disagreement

Participants express varying approaches to normalization and plotting, with no consensus on the best method or tool. The discussion remains unresolved regarding the specifics of using the FM multiplier and the capabilities of MCPLOT.

Contextual Notes

There are limitations regarding the understanding of how to integrate continuously updated parameters into the FM card and the specifics of normalizing tallies within MCPLOT.

19matthew89
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TL;DR
Newbie with MCNP here: how to plot (normalized tallies)?
Hi everyone,
I'm really new to MCNP here and I'm "playing" around trying to understand what is going on.

I'd like to plot my tallies (F2, F4 and F6). Is there any tool (e.g. python or matlab package) you recommend?

I know that the internal plot MCPLOT is available but I'm wondering how you normalize the tallies there. In a postprocess data treatment you'd multiply, for instance the F4 tallies, times nu power and divide by energy per fission and k_eff. But I was wondering, can you have that done by MCPLOT so to properly plot the "real" tally?

Thanks a lot in advance
 
Last edited:
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Perhaps you can try to use the FM multiplier subcard in the input program to process the data directly, then plot.
 
Hi,
Yeah. I had thought of that. But as you need to divide by the k_eff which is found in the code itself, can you feed in the FM card a parameter like the k_eff which is continuously updated? Or can you only multiply by a constant?
 
Do somebody uses "time based" tallies and know how to plot them
Regards
Thibaut
 

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