zapkitty wrote:
I thought that the production DPFs, boron-fueled, were to have a low radiation
footprint?… That is, once you’re outside of the x-ray converter shell.

yes, though ~0.1% of reactions do generate some slow neutrons:
11B + α → 14N + n + 157 keV;
11B + p → 11C + n − 2.8 MeV;

and ~.01% produce a gamma:
11B + p → 12C + γ + 16.0 MeV.