Abstract: An apparatus and method of sealing the cold leg nozzles of a reactor vessel during plant outages for reactor vessel inspection and core support maintenance includes insertion of a sealing plug into each of the cold leg nozzles, by means of an installation tool suspended within the vessel, to permit drainage of downstream piping and inspection and maintenance of associated steam generators and pumps.

Abstract: An accumulating conveyor system for transporting and storing plural loads, formed of a pair of laterally spaced parallel lines of non-powered rollers and an intervening load advancing car reciprocative along advance and return strokes between the ends of the roller lines. The load advancing car has a load advancing friction pad movable vertically from a raised load engaging position to a retracted inactive position under control of a monitor wheel which also moves vertically, to retract the pad from load engaging position responsive to contact of the wheel with loads along the lines of rollers.