Part 21 Report - 1995-116
COOPER ENERGY SERVICES 28710 04-21-95 OTH
LICENSEE: COOPER ENERGY SERVICES
SITE: .COOPER ENERGY SERVICES . EN NUMBER:28710
DOCKET: EVENT DATE: 04-21-95
RX TYPE: EVENT TIME: 13:02
VENDORS: NOTIFY DATE: 04-21-95
EMERGENCY CLASS: N/A REGION: 1 STATE: PA TIME: 13:02
OPS OFFICER: JOSEPH SEBROSKY
10 CFR SECTION: CCCC 21.21 UNSPECIFIED PARAGRAPH
COOPER ENERGY SERVICES OF GROVE CITY, PA IS ISSUING A 10 CFR PART
21 REPORT DUE TO A POTENTIAL DESIGN DEFECT OF THE KSV EMERGENCY
DIESEL GENERATOR (EDG) SYSTEM.
THE PROBLEM WAS FIRST REPORTED AT NINE MILE POINT UNIT 2 AND
CONCERNS A POTENTIAL DEFECT WITH THE COOLING WATER SYSTEM FOR THE
MECHANICAL GOVERNOR. ON JANUARY 29, 1995 UNIT 2 EXPERIENCED A
GOVERNOR FAILURE OF THE DIVISION 1 EDG DUE TO OVERHEATING OF THE
GOVERNOR. TESTING OF THE FAILED MECHANICAL GOVERNOR REVEALED
THAT THE ROOT CAUSE OF THE FAILURES WAS: 1) A LOW OR NO FLOW
CONDITION DURING LOW COOLING WATER FLOW CONDITIONS, 2) TOO SMALL
AND/OR LONG WATER TUBING RUNS, 3) LOW DIFFERENTIAL PRESSURE
ACROSS THE INTERCOOLERS (THE SOURCE OF COOLING WATER FOR THE
GOVERNOR COOLING SYSTEM).
THE COOLING SYSTEM FOR THE MECHANICAL GOVERNOR WAS DESIGNED AND
SUPPLIED BY COOPER-BESSEMER. THE PLANTS THAT ARE AFFECTED ARE
NINE MILE POINT UNIT 2, AND BYRON UNITS 1 AND 2.
Page Last Reviewed/Updated Wednesday, March 24, 2021