Gavin Ridley

## Bug Description In #2916 it was mentioned that the source rejection counters, which are static variables, are not incremented in a threadsafe way. This has not resulted in any...

The XML formats manual does not document the element, which is permissible and works just fine. The python `Plot` documentation does have it, though. https://docs.openmc.org/en/latest/io_formats/plots.html Try ctrl-f for the word...

## Bug Description I have not written any test cases, but we can see that in physics.cpp's `sample_fission_neutron`, in the delayed case, the decay time is not sampled and added...

(Not necessarily expecting a merge) Unbiased Chi2 sampling in PURR

3

I found in my PhD studies that the Chi^2 sampling scheme in PURR is pretty severely biased. It uses a pre-tabulated set of twenty chi^2 samples for one through four...

Secondary energy filter

10

# Description Towards being able to generate multigroup photon/neutron libraries for shielding purposes, with the eventual goal of random ray adjoints for dose in shielding contexts, I have implemented a...

## Description In ANS M&C 2025, I overheard that Serpent sorts neighbor lists by the surface crossing frequency in order to first check for intersections with the most likely surface....