MCNP to OpenMC tool

Announcements
1

Some of you may be aware that I have an MCNP to OpenMC conversion tool that I’ve worked on over the years. I spent a little bit of time this week packaging it up into a separate repository and have put it out in the open here:

It’s definitely not perfect and has some flaws, but it still may be useful for some purposes. If you do use it, make sure you read the disclaimer/known limitations on the README :smile:

For those interested in this topic, I’ll also draw attention to another open-source tool written by @makeclean that does CSG model conversion (goes beyond just MCNP → OpenMC but has a different set of limitations):

8 Likes
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Hi Paul,

just used your tool to convert my MCNP materials to OpenMC.
Worked great. Really didn’t want to rename all those nuclides by hand (or self-script).

You (or anyone else) wouldn’t happen to know of any SDEF MCNP → OpenMC converters/scripts out there in the wild? (regardless of their maturity)

Regards,
Perry

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Hi Perry – Glad to hear the MCNP conversion tool worked well for you! Unfortunately I’m not aware of any tools out there for converting SDEF source definition cards.

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Paul,

Do you know of any tools to convert OpenMC to MCNP? I really like the geometry and materials definition tools that you guys have in OpenMC but need to get things like mean generation time and a few other things out of MCNP.

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I’m not aware of such a tool. It’s not too much of a stretch to imagine the following:

model = openmc.Model()
model.geometry = ...
model.settings = ...

model.export_to_mcnp(filename)

But, given limited resources and time (and money), adding such a functionality has never made it to the top of my list. Maybe someone can convince the good folks at LANL to fund such a feature :slight_smile:

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I’ll ping Jerawan and the other MCNP folks I know at LANL about it!

Thanks

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Just noting that I came across a paper describing another package (not yet open source, but soon to be?) that is capable of doing MCNP to OpenMC conversion: