Please see http://peswiki.com/index.php/Directory:Resonant_Nuclear_Reactor sites or see http://www.rexresearch.com/nucell/nucell.htm
STL (Stereolithography, filesize: 2.56 MB), OBJ (OBJ, filesize: 1.84 MB), 3DS (3D Studio, filesize: 1.44 MB), DAE (Collada, filesize: 3.5 MB), FBX (Autodesk FBX, filesize: 3.02 MB), IGE (IGES, filesize: 299 Bytes), MAX (Autodesk 3ds Max, filesize: 2.57 MB), SKP (Sketchup, filesize: 3.52 MB), OTHER (Other, filesize: 1.23 MB)