Part 21 Report - 1998-102

ACCESSION #: 9801160144

POWER REACTOR		EVENT NUMBER:	33536
FACILITY: INDIAN POINT	REGION: 1	NOTIFICATION DATE:	01/14/98
UNIT: [2] [ ] [ ]	STATE: NY	NOTIFICATION TIME:	17:14 (ET]
RX TYPE: [2]W-4-LP, [3] W-4-LP		EVENT DATE:	01/14/98
		EVENT TIME:	15:00[EST]
NRC NOTIFIED BY:	PHIL SANTIANI	LAST UPDATE DATE:	01/14/98
HQ OPS OFFICER:	DICK JOLLIFFE	NOTIFICATIONS
EMERGENCY CLASS:	NOT APPLICABLE
10 CFR SECTION:	JOHN ROGGE	RDO
CDEG 21.21(c)(3)(i)	DEFECTS/NONCOMPLIANCE
		VERN HODGE	NRR

UNIT	SCRAM CODE	RX CRIT	INIT PWR	INIT RX MODE	CURR PWR	CURR RX MODE
2	N	N	0	COLD SHUTDOWN	0	COLD SHUTDOWN

EVENT TEXT

- 10CFR PART 21 REPORT -

TWELVE SAFETY-RELATED 480-VOLT WESTINGHOUSE MODEL #DB-50 CIRCUIT BREAKERS WERE SENT TO WESTINGHOUSE REPAIR AND REPLACEMENT SERVICES, CHESWICK, PA, AN APPROVED 10CFR50, APPENDIX B QUALIFIED REPAIR FACILITY, FOR OVERHAUL.

DURING PRE-INSTALLATION TESTING, THE LICENSEE DETERMINED THAT LOW TRIP BAR FORCES AND THE WINDING OF THE TRIP PAN SPRING CONTRIBUTED TO BREAKER MIS-OPERATION. IF INSTALLED, THIS MIS-OPERATION MIGHT HAVE RESULTED IN THE BREAKERS MALFUNCTIONING WHEN CALLED UPON TO PERFORM THEIR SAFETY-RELATED FUNCTION.

THESE BREAKER ANOMALIES WERE PREVIOUSLY REPORTED TO THE NRC IN LER #97-024.

THE LICENSEE PLANS TO REPAIR AND TEST THESE BREAKERS (AND THE REMAINING 38 SAFETY-RELATED 480-VOLT BREAKERS) ON-SITE PRIOR TO INSTALLATION.