Drive mechanism for moving control rods in and out of a nuclear reactor core, has a pocket in the seat for the rod to allow foreign matter to be removed from the guide tube

摘要

The seat (12) for the control rod (9) includes a pocket (16) with an opening facing upwards towards the element. A device for handling an elongated element with an essentially vertical central axis (x) and designed to be moved up and down inside a guide tube, comprises a drive mechanism and a piston (7) beneath the element, and a seat in the guide tube for resting the bottom of the element against. The seat includes a pocket with an opening facing upwards towards the element.