Part 21 Report - 1996-610

LICENSEE: COOPER ENERGY SERVICES SITE: COOPER ENERGY SERVICES EN NUMBER:30728 DOCKET: EVENT DATE: 07-10-96 RX TYPE: EVENT TIME: 00:00 VENDORS: NOTIFY DATE: 07-10-96 EMERGENCY CLASS: N/A REGION: 1 STATE: PA TIME: 14:25 OPS OFFICER: CHAUNCEY GOULD 10 CFR SECTION: NINF INFORMATION ONLY CCCC 21.21 UNSPECIFIED PARAGRAPH COOPER ENERGY SERVICES(CES) REPORTED A PART 21 CONCERNING A POTENTIAL DEFECT OF THE ENTERPRISE DSR-4 & DSRV-4 EMERGENCY DIESEL GENERATORS. THE POTENTIAL DEFECT CONCERNS THE STARTING AIR ADMISSION VALVES (BLOCK AND VENT VALVES), ENTERPRISE PART NO. KR-001-000, WHICH WERE ORIGINALLY MANUFACTURED BY CALCON CORP. (CALCON HAS SINCE BEEN PURCHASED BY AMOT CONTROLS CORP.) THESE VALVES ARE PART OF REDUNDANT STARTING CIRCUITS SUCH THAT TWO ARE EMPLOYED ON MODEL DSR-4 AND FOUR ON MODEL DSRV-4. THE POTENTIAL DEFECT WAS REPORTED TO CES BY ENTERGY OPERATIONS AFTER THREE VALVES AT THE RIVER BEND PLANT FAILED DURING OPERATION OR WHILE ON THE TEST BENCH. FAILURE OF THESE VALVES COULD RENDER THE EDG INOPERABLE AND NO CLEAR CAUSE OF THE FAILURES HAS BEEN DETERMINED. THE FOLLOWING NINE U.S. SITES ARE AFFECTED: HARRIS, PERRY, CATAWBA, GRAND GULF, RIVER BEND, VOGTLE, COMANCHE PEAK, BELLEFONTE AND WNP-1. THERE ARE ALSO SEVERAL SITES IN KOREA AND TAIWAN WHICH MAY BE AFFECTED.

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