United States Nuclear Regulatory Commission - Protecting People and the Environment


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.                                 



Page Last Reviewed/Updated Thursday, March 29, 2012