United States Nuclear Regulatory Commission - Protecting People and the Environment

LICENSEE: SOUTHERN CALIFORNIA EDISON & SAN DI
SITE: SAN ONOFRE 1 2 3                      EN NUMBER:28755
DOCKET: 05000206 05000361 05000362       EVENT DATE: 03-14-95
RX TYPE: PWR PWR PWR                     EVENT TIME: 00:00
VENDORS: W-3-LP CE CE                   NOTIFY DATE: 05-03-95
EMERGENCY CLASS: N/A  REGION: 4 STATE: CA      TIME: 15:25
OPS OFFICER: GREG SCARFO              
10 CFR SECTION: CDEG  21.21(c)(3)(i)      DEFECTS/NONCOMPLIANCE
UNIT  SCRAM   RX   INIT  INITIAL MODE     CURR   CURRENT MODE
      CODE   CRIT  PWR                    PWR
 1    N       N      0   DECOMMISSIONED     0   DECOMMISSIONED 
 2    N       N      0   REFUELING          0   REFUELING      
 3    N       Y     99   POWER OPERATION   99   POWER OPERATION

INCORRECT LUGS USED ON SWITCHGEAR.                               
                                                                 
IT WAS DETERMINED THAT THE AMP INCORPORATED INSULATED LUGS USED  
WITH THE #14 GAUGE WIRE IN ABB 4160V-5HK AND 480VK LINE          
SWITCHGEAR DELIVERED IN 1975 BY ITE ARE OVERSIZED AND COULD FAIL 
DUE TO "PULL-OUT" FROM ANY UNUSUAL LOAD APPLICATION. THE CAUSE OF
THE DEFECT IS BELIEVED TO BE THE MISMARKING OF THE LUGS, WHICH   
WERE MARKED AS "#12-10".  THE MISMARKED LUGS WERE SUPPLIED WITH  
SWITCHGEAR THAT WAS DELIVERED TO THE PLANT IN 1976.              

Page Last Reviewed/Updated Thursday, March 29, 2012