United States Nuclear Regulatory Commission - Protecting People and the Environment


LICENSEE: NEBRASKA PUBLIC POWER DISTRICT     

SITE: COOPER 1                              EN NUMBER:34233

DOCKET: 05000298                         EVENT DATE: 03-18-98

RX TYPE: BWR                             EVENT TIME: 00:00

VENDORS: GE-4                           NOTIFY DATE: 05-14-98

EMERGENCY CLASS: N/A  REGION: 4 STATE: NE      TIME: 15:02

OPS OFFICER: LEIGH TROCINE            

10 CFR SECTION: CCCC  21.21               UNSPECIFIED PARAGRAPH

UNIT  SCRAM   RX   INIT  INITIAL MODE     CURR   CURRENT MODE

      CODE   CRIT  PWR                    PWR

 1    N       Y    100   POWER OPERATION  100   POWER OPERATION



10 CFR PART 21 NOTIFICATION - DEFECTS IN ASCO SOLENOID VALVES    

                                                                 

ON MARCH 18, 1998, COOPER NUCLEAR STATION (CNS) DETERMINED THAT  

THE AUTOMATIC SWITCH COMPANY (ASCO) SOLENOID VALVES, PURCHASED   

UNDER PURCHASE ORDER (PO) 970161, CONTAINED A DEFECT.  THESE     

VALVES (PART NO. NPL8342B2E) WERE RECEIVED BY CNS ON MAY 29,     

1997.  CNS FOUND BRASS STRANDS INSIDE THE VALVE BODIES OF TWO OF 

THE VALVES.  THESE BRASS STRANDS HAVE BEEN FOUND TO BE THE MOST  

LIKELY CAUSE FOR IMPROPER OPERATION OF THE VALVES.  THESE VALVES 

WERE MANUFACTURED BY ASCO, 50-60 HANOVER ROAD, FLORHAM PARK, NEW 

JERSEY, 07932.                                                   

                                                                 

CNS PURCHASED THREE VALVES UNDER PO 970161.  ONE OF THESE VALVES 

WAS INSTALLED AS HV-SOV-(SPV-259) IN THE REACTOR BUILDING        

VENTILATION SYSTEM. THIS VALVE FAILED ON MARCH 1, 1998, AND IT   

HAS SINCE BEEN REPLACED.  BRASS STRANDS WERE FOUND INSIDE THIS   

VALVE.  THE OTHER TWO VALVES WERE IN THE                         

WAREHOUSE.  BRASS STRANDS ALSO WERE FOUND IN ONE OF THESE TWO    

VALVES.  CNS, HOWEVER, DID NOT FIND ANY BRASS STRANDS IN A SPARE 

VALVE FROM ANOTHER PO. ALL THREE VALVES FROM PO 970161 HAVE BEEN 

RETURNED TO ASCO.                                                

                                                                 

THE LICENSEE PLANS TO NOTIFY THE NRC RESIDENT INSPECTOR.  (REFER 

TO THE HOO LOG FOR A SITE CONTACT TELEPHONE NUMBER.)             



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