United States Nuclear Regulatory Commission - Protecting People and the Environment

LICENSEE: SOUTH CAROLINA ELECTRIC & GAS CO.  
SITE: SUMMER 1                              EN NUMBER:30752
DOCKET: 05000395                         EVENT DATE: 05-17-96
RX TYPE: PWR                             EVENT TIME: 00:00
VENDORS: W-3-LP                         NOTIFY DATE: 07-15-96
EMERGENCY CLASS: N/A  REGION: 2 STATE: SC      TIME: 16:15
OPS OFFICER: BOB STRANSKY             
10 CFR SECTION: CDEF  21.21(b)(2)         DEFECTS/NONCOMPLIANCE
UNIT  SCRAM   RX   INIT  INITIAL MODE     CURR   CURRENT MODE
      CODE   CRIT  PWR                    PWR
 1    N       N      0   HOT SHUTDOWN       0   HOT SHUTDOWN   

10 CFR PART 21 REPORT REGARDING FAILURES OF ABB/ITE 27N RELAYS.  
                                                                 
THE FOLLOWING IS TEXT OF A FACSIMILE SUBMITTED BY THE LICENSEE:  
"NONCONFORMANCE NOTICE 5472 REPORTS THE THIRD FAILURE OF ABB/ITE 
27N RELAYS AT V.C. SUMMER NUCLEAR STATION WITHIN A THREE YEAR    
PERIOD. IN EACH CASE, THE TIMER INTEGRATED CIRCUIT U5 WAS        
DETERMINED TO BE DEFECTIVE. IN ALL CASES, V.C. SUMMER NUCLEAR    
STATION ENSURED THAT THE ASSOCIATED APPLICATIONS WERE RESTORED TO
OPERABLE STATUS UPON IDENTIFICATION, REPLACEMENT AND TESTING OF  
THE RESPECTIVE 27N RELAYS. ABB HAS NOT ESTABLISHED A ROOT CAUSE  
FOR WHAT APPEARS TO BE A REPETITIVE FAILURE OF THE U5 TIMER. THIS
REPORT IS BEING MADE PURSUANT TO 10 CFR PART 21."                
                                                                 
THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED BY THE LICENSEE.    

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