Patent Number: 051695936
Section: claims

1. In apparatus for handling a nuclear reactor control rod drive within the confines of a sub-pile room situated below the nuclear reactor as an adjunct of control rod drive removal from or installation in the nuclear reactor which apparatus includes a generally horizontally disposed work platform in said sub-pile room, the work platform including a slot therein and there being opposed support rails in the slot, an elongated tower comprised as a structure of spaced side rails and cross braces extending therebetween, the tower having a pivot means carried in each side rail adjacent a first tower end with wich the tower can be supported in generally vertical disposition from the support rails under a control rod drive location so that a control rod drive can be lowered onto or raised up from said tower during a respective removal or installation,  means for applying lifting force to an opposite end of said tower to pivot said tower when vertically disposed at the pivot means and therewith orient the tower and a control rod drive carried therein to horizontal disposition, and  normally retracted roller means fixed to each side rail of the tower at the tower opposite end, said roller means when extended with the tower in horizontal disposition having supported rolling engagement contact with said support rails whereby said tower opposite end is maintained at horizontal orientation solely by said roller means so that the tower is converted to a rollable cart structure for transport therewith of the control rod drive along said support rails to an outlet from said sub-pile room to another space. 2. The apparatus of claim 1 in which the pivot means include trunnion shafts fixed to the tower side rails and received in roller bearings set on a rollable trunnion cart movable along the support rails.