Item title reads - Atom power steps up.
New gas-cooled reactor project at Windscale, Cumberland.
Various shots of Windscale Atomic Energy Plant. M/S new gas-cooled reactor still being built. Various shots inside the reactor of workers welding the inside of the pressure vessel. M/S stubs in the top dome of the pressure vessel through which the fuel elements will be charged and discharged, C/U man checking the stubs. Banks of boiler tubes are inserted in the heat exchangers which are being built at the contractor's works. M/S one of the giant 90 ton heat exchangers arriving on the site. M/S reactor into which the heat exchangers are put. M/S heat exchanger being lifted into position by a derrick on a swivel. Camera pans along as it is lifted. M/S heat exchanger suspended above the reactor. M/S girders inside reactor. Camera pans across pressure vessels inside the reactor. M/S's men working on top of the reactor. M/S reactor vessel.