Part 21 Report - 1998-380

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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