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37 Appendix A ~' June 1981: A spent fuel assembly at Donald C. Cook Unit 1 was damaged o when its lo~•er end struck a ledge outside of the reactor pressure vessel. During lifting of the fuel assembly from the core, the two air lines and the electric cable serving the gripper tangled and caught the gripper-tube-up position switch, clos- ~' ing it before the gripper tube and attached fuel assembly were in the full-up posi- lion inside the canister. Closing the switch cleared the interlock allowing lateral n;, movement of the manipulator crane. The lower end of the fuel assembly pro- - ~, traded below the canister and it struck a ledge on the refueling cavity floor just outside the reactor pressure vessel area. Several fuel rods in the assembly were ~° damaged ~•ith one fuel rod dislodging from the assembly and falling onto the n reactor cavity floor.'" i February 1986: An irradiated fuel assembly was inadvertently lifted from E the Haddam Neck core when the upper core support structure was removed f from the reactor vessel. The irradiated fuel assembly stuck to the structure c because of a bent fuel assembly locating pin. AS the structure was moved lateral- ly, the assembly struck the core barrel and dropped two to four feet onto the core. The dropped assembly and the two irradiated fuel assemblies it impacted were 4 damaged." June 1994: While lowering a fuel assembly into the Quad Cities Unit 1 reac- e for core, the lower end-fitting caught on either the edge of the control rod blade guide or the upper core grid plate. The operator did not notice that the lower end- = fitting was caught and continued to lower the fuel assembly. A fuel handling ver- ifier noticed the problem when the fuel assembly was leaning 45° to 65' from ver- / tical and notified the operator. The fuel assembly was raised, repositioned, aril ~. inserted into the core. After inserting the fuel assembly into the core, the refuel- ', ing grapple would not release from the fuel assembly's bail handle. The fuel ;assembly was returned to the spent fuel pool. Inspection determined that the refueling mast grapple would not release because the bail handle had been bent. No other damage to the fuel assembly or adjacent core components was identi- fied. :;~ May 1995: As a storage cask loaded with 40 spent fuel assemblies was lifted out of the Prairie Island spent fuel pool, an overload device actuated to stop the ~r. . w'ane's movement. The storage cask's bottom remained three inches below the f top of the spent fuel pool's walls. The loaded cask remained suspended over the spent fuel pool for nearly 16 hours until station personnel manually bypassed the overload interlock to permit the crane to resume lifting. ~., `~~' June 1995: The lower tie plate and 41 fuel rods separated from the upper rie plate and the remaining eight fuel rods while an irradiated fuel assembly ~•as `.being relocated ti•ithin the Oyster Creek spent fuel pool. The fuel assembly had ~: operated in the Oyster Creek reactor during the 19i0s before being discharged in ~, April 1980. A similar event occurred at Ouster Creek in 1986. Following the earli- :~ er event, the fuel rods ~-ere remo~•ed from the broken fuel assembly and placed ~• into a defecti~•e fuel canister.' 169