Screwing device and method for locking a control rod drive housing tube nut of a nuclear power station

摘要

A screwing device is described that contains a drive housing tube nut to be screwed onto a control rod drive housing tube of a nuclear power station. The drive housing tube nut has an axis of rotation. A locking pin is disposed into the drive housing tube nut. The locking pin is disposed inclined radially to the axis of rotation at an axial inclination angle with respect to the axis of rotation of the drive housing tube nut. The locking pin is further oriented such that one component of orientation of the locking pin points in a tangential direction.