Sequence shot in control room of nuclear reactor in Chalk River showing various dials, needles moving, of technicians (men) flicking switches and turning knobs on control panel, of other technician (man) talking in microphone at control console directing operation of changing rod in reactor, of various appartus in control room. Two PANs along accelerator used to bombard atoms with high speed particles. Two MSs of students (men and woman) from India being shown nuclear reactor at Chalk River. HACS of geiger counter recording measurement of energy activity from uranium metal cube.