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35 Appendix A ~.'. ~•: r. reactor core fully off-loaded into the spent foe! pool. During motor-operated -valve testing, the outlet valve on the in-service CCW heat exchanger was closed °jinstead of the outlet valve on the standby heat exchanger. The SFP heated up ifrom 90°F to 130°F in three hours. The annunciation of high SFP temperature at 'i'K130°F alerted operators to the problem. Spent fuel pool temperature peaked at nearly 140°F before cooling flow could be reestablished. "~t`~~ February 1995: The fuel pool cooling system at Indian Point Unit 3 was out ;~of service for 2 hours and 15 minutes after a crane outside the Indian Point 2 pro- :~tected area caused the 138 kV off-site feeder line for Unit 3 to arc. The emergency .,;. ,diesel generators started and supplied power to the safety related equipment at ~~the plant Following off-site power restoration, the nonsafety related fuel pool ~ cooling system was returned to service. Radiation Overexposure ~~~;•• Before 1972: An irradiated fuel assembly being withdrawn from the reactor mre was inadvertently raised to ~•ithin four feet of the water's surface. As the Euel assembly reached the normal upper limit position, the operator released the hoist's 11P button. The hoist continued to raise the fuel assembly until the opera- tor pressed the STOP button to de-energize the hoist motor. The radiation level at the operator's location was estimated to be 125 mr/hr with the irradiated foe! assembly at its maximum height. Investigation disclosed that repetitive jogging of the hoist had welded the UP relay contacts closed." ~~'~• April 1978: Two radiation protection technicians at the Trojan Nuclear +^' Power Plant received whole body radiation doses of 27.3 and 17.1 Rem while per- ._ forming a survey adjacent to an exposed section of the spent fuel assembly trans- 'fer htbe.10 ... ;~ f ; March 1984: A diver repairing the fuel transfer upender at the Palisades Nuclear Generating Plant received an exposure of about 4.5 Rem to the right 'thigh during a three dive series. The diver kneeled in a radioactive sludge layer . ~;; on the tilt pit floor." Fuel Handling ~~ 1971: An irradiated fuel assembly became disengaged from the fuel han- h• .'_ Yelling tool and dropped approximately 10 feet into an empty fuel storage position A~. ».. during fuel transfer operations at a PWR. Visual examination did not disclose any " ~ ' . y discernible damage to the fuel assembly. The fuel handling tool's top edge showed some slight galling that prevented the tool from properly latching the ~'ftiel assemblv.'= i; ..- ~<`'~- January 1974: While an irradiated fuel assembly was being transferred from ~~the reactor core to the spent fuel pool at the Pilgrim Nuclear Plant, the main refu- ~~eling grapple loti~ered ti•ithout the operator's kno~~ledge. The fuel assembly ,'struck the reactor pressure yesse!'~ side but ~.•as nc~t damaged. Investigation dis- r• ,: 4~ ~F' ~;. ~ 6