NRU Reactor (57-322-5): Interior shots, HASs of reactor room with giant travelling crane lowering control rods into reactor. CU of rod and of man guiding it into reactor. Shots of recording meter, of man on moveable control console, of worker lowering rods into reactor. Sequence of shots showing a model of the reactor. HAS of crane and console. More similar shots and shots of car on which is written: "ATOMIC ENERGY COMMISSION OF CANADA - CHALK RIVER, ONT". P EN CP au centre de recherche atomique de Chalk River.l