Protecting People and the EnvironmentUNITED STATES NUCLEAR REGULATORY COMMISSION
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.
