Headquarters Daily Report
MAY 19, 1999
***************************************************************************
REPORT NEGATIVE NO INPUT
ATTACHED INPUT RECEIVED RECEIVED
HEADQUARTERS X
REGION I X
REGION II X
REGION III X
REGION IV X
PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION III MAY 19, 1999
Licensee/Facility: Notification:
Detroit Edison Co. MR Number: 3-99-0044
Fermi 2 Date: 05/18/99
Newport,Michigan SRI via telecon
Dockets: 50-341
BWR/GE-4
Subject: FERMI UNIT 2 MANUALLY SCRAMMED FOLLOWING TRIP OF THE "A"
REACTOR RECIRCULATION PUMP
Discussion:
The Fermi 2 nuclear plant was manually shut down by operators following
the unexpected trip of a reactor recirculation pump. On May 18, 1999,
while an electrical maintenance individual was replacing a field brush on
the "A" motor generator (MG) set, an electrical wire contacted the center
slip ring on the motor end of the MG set. The resulting ground fault
caused a generator lockout relay to trip which tripped the "A" reactor
recirculation pump. Reactor power remained at 97 percent as core flow
dropped to approximately 40 percent because of the pump trip. This placed
the reactor in the scram region of the Technical Specification power to
flow map. In accordance with procedures, the operators placed the mode
switch to the "shutdown" position which scrammed the reactor. All rods
inserted as expected, no emergency core cooling system equipment actuated
and no safety relief valves lifted in response to the event. All systems
responded as expected.
Regional Action:
The resident inspectors responded to the site, and monitored recovery
activities.
Contact: Anton Vegel (630)829-9620
_
