A self-revealing Finding of very low safety significance was identified forEntergy not fully developing an adequate preventive maintenance (
PM) program for thereactor building crane (
RBC). As a result, on May 12, 2008, when the first loaded spentfuel storage cask was removed from the spent fuel pool (
SFP) and was being lowered toa height of four inches above the refueling floor, the crane brakes did not engage andthe spent fuel storage cask continued to be slowly lowered to the refueling floor. Thisissue was entered into the licensees corrective action program as condition reportCR-VTY-2008-02043.This issue is greater than minor because the finding resulted in the failure of the RBCbrakes to engage during the lowering of a loaded spent fuel storage cask. The findingwas determined to be of very low safety significance (Green) because the spent fuelstorage cask remained under control of the reactor building crane, was in an approvedload path, and the emergency braking system was available
