Abstract: A blade replacement apparatus is disclosed, including a nut loosening/tightening member, a locking member, and an operating member, wherein one of the nut loosening/tightening member and the operating member is provided with a first matching portion, and the locking member is provided with a second matching portion. The operating member is movable between an operating position and a non-operating position. When the operating member is in the non-operating position, the first matching portion engages with the second matching portion. The locking member and the operating member are rotatable to one another. Rotation of the nut loosening/tightening member around a first axis is obstructed by the locking member. When the operating member is in the operating position, the first matching portion is disengaged from the second matching portion, and rotation of the nut loosening/tightening member around the first axis tightens or loosens the nut.

Abstract: The present disclosure shows an anti-rotation bolt for fastening reactor plates to prevent subsequent SCC problems wherein the bolt head has a circumferential series of anti-rotation tabs extending from the head of the bolt which are moved in by a restrainer cone which is placed on top of the bolt to allow its insertion into the plates and is removed for locking the tabs into detents formed in one of the plates to provide anti-rotation. The cone is again moved over the tabs during the removal of same leaving the bolt undamaged and fit for reuse.