Abstract: A channel box removing apparatus which permits a removal of the channel box from a nuclear fuel assembly while being placed on a fuel rack in a spent fuel storage pool without transferring to a preparation machine. The apparatus includes a pair of pivotally mounted, releasable hooks movable between a latched position where the hooks are in lifting engagement with the undersurfaces of clips provided on a pair of diagonally opposed top corners of the channel box and an unlatched position where the hooks are out of engagement with the associated clips. The apparatus also includes a bail cap mounted thereon for vertical movement and adapted to cooperate with a bail of the fuel assembly to guide the apparatus into an operative position with the fuel assembly during lowering of the apparatus. A locking mechanism is provided for preventing accidental disengagement of the hooks from the associated clips when the channel box is being lifted.

Abstract: An elongated wrench for fastener bolts, such as commonly used with nuclear fuel assemblies for a boiling water type nuclear reactor. The bolt wrench includes a socket wrench mounted to a control rod, an outer cover for supporting the control rod for axial as well as rotational movement therein, a plurality of releasable hooks pivotally mounted to the control rod around the socket wrench, and a control lever for moving the outer cover relative to the control rod to cause the releasable hooks to grip a fastener bolt. In a second embodiment, a pair of releasable hooks having guide rollers are pivotally mounted to a support sleeve which, in turn, is mounted on the outer cover for axial movement relative thereto. An actuator link having a pair of guide grooves adapted to receive the associated rollers is movable along the support sleeve in response to axial movement of the outer cover relative to the control rod.