This is all done in onshape.com The same team that made the CAD program called SolidWorks (before they sold it to Dassault Systemes for $600 million!).
The ENTIRE design is public. You should be able to find it and load it. Still a work in progress, but the Calcium Reactor model is done if you wanted to build yourself one of those
NOTE: assumes you know how to use a parametric CAD system.