The device reactor we are anticipating needs to be manufactured out of stainless steel and preferably a 316L to withstand surface stress applied when exposed to certain types of atmospheres like heat and compressed hydrogen, and possibly low gamma radiation.
Material size based on the scaled to size drawings is a 5" OD circularly inscribed octagon shaped piece of stainless steel 2.5" thick.
A couple smaller diameter stainless steel blocks 3.625" OD circularly inscribed octagon shaped pieces 1.25" thick.
Eight copper tubes about 3" long x .3125" OD & a hollowed center as to form a chamber bored through the longitudinal axis .1875" diameter.
Here are the drawings for the preliminary view, these are patent drawings however scaled to actual product. I will publish more as they become available.