Part 21 Report - 1998-360
LICENSEE: SAIC, INC, EGS DIVISION
SITE: SAIC, INC, EGS DIVISION EN NUMBER:34190
DOCKET: EVENT DATE: 05-07-98
RX TYPE: EVENT TIME: 01:00
VENDORS: NOTIFY DATE: 05-07-98
EMERGENCY CLASS: N/A REGION: 2 STATE: AL TIME: 17:14
OPS OFFICER: BOB STRANSKY
10 CFR SECTION: CDEG 21.21(c)(3)(i) DEFECTS/NONCOMPLIANCE
10CFR PART 21 REPORT REGARDING INCORRECTLY INSTALLED MOVABLE
CONTACTS IN CUTLER-HAMMER RELAYS PROVIDED TO DUKE POWER COMPANY
AND GEORGIA POWER COMPANY.
MOVABLE CONTACTS IN A CUTLER-HAMMER D26MA 4-POLE FRONT
ATTACHMENT
FOR A D26 RELAY WERE FOUND TO BE INSTALLED UPSIDE DOWN. THE
PROBLEM WAS IDENTIFIED TO CUTLER-HAMMER IN OCTOBER 1997, AND IS
THOUGHT TO BE A RANDOM OCCURRENCE. HOWEVER, THE VENDOR HAS TAKEN
STEPS TO PREVENT RECURRENCE.
THE CALLER REPORTED THAT WITH THE INCORRECTLY INSTALLED MOVABLE
CONTACTS, THE RELAY WILL WORK PROPERLY WHEN NEW, BUT THE COPPER
CONTACT SURFACE WILL BE BURNED AWAY BY REPEATED OPENING AND
CLOSING OF THE RELAY, INCREASING CONTACT RESISTANCE. (THE OTHER
SIDE OF THE CONTACT IS COATED WITH SILVER TO PREVENT THIS
PROBLEM.) THIS CONDITION COULD LEAD TO UNSATISFACTORY OPERATION
OF THE RELAY CONTACTS AT SOME POINT IN THE FUTURE.
THE CALLER STATED THAT THE DATE CODES OF POTENTIALLY AFFECTED
RELAY ATTACHMENTS WOULD BE PROVIDED TO THE NRC IN A LETTER TO BE
ISSUED ON 05/08/98. HOWEVER, A TOTAL OF SIX POTENTIALLY AFFECTED
RELAY ATTACHMENTS WERE SOLD TO GEORGIA POWER COMPANY, AND 80
RELAY ATTACHMENTS WERE SOLD TO DUKE POWER COMPANY. A SIMPLE
VISUAL INSPECTION OF THE ATTACHMENT WILL DETERMINE WHETHER THE
CONTACTS ARE ORIENTED CORRECTLY.
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