Protecting People and the EnvironmentUNITED STATES NUCLEAR REGULATORY COMMISSION
LICENSEE: COOPER ENERGY SERVICES
SITE: COOPER ENERGY SERVICES EN NUMBER:34281
DOCKET: EVENT DATE: 05-22-98
RX TYPE: EVENT TIME: :
VENDORS: NOTIFY DATE: 05-22-98
EMERGENCY CLASS: N/A REGION: 1 STATE: PA TIME: 16:10
OPS OFFICER: FANGIE JONES
10 CFR SECTION: CCCC 21.21 UNSPECIFIED PARAGRAPH
10-CFR-PART-21 NOTIFICATION - ENTERPRISE DSR-4 AND DSRV-4
EMERGENCY DIESEL
AN APPLICATION PROBLEM HAS BEEN ASSOCIATED WITH THE 701 DIGITAL
SPEED CONTROL (REVISION 'G' CONTROLLER DESIGN) INSTALLED AT
PLANTS VOGTLE AND COMANCHE PEAK. THE SPEED CONTROLS ARE
MANUFACTURED BY WOODWARD GOVERNOR COMPANY AND SOLD BY COOPER
ENERGY SERVICES AS PART NUMBER 2-02G-110-001. REVISION 'G' IS THE
ONLY REVISION OF THE SUBJECT PART THAT HAS THE POTENTIAL PROBLEM,
AND IT WAS RECENTLY INTRODUCED TO ADDRESS AN ANOMALY OF PREVIOUS
CONTROLLERS. EVALUATIONS OF THE ANOMALY INDICATED NO CREDIBLE
PROBLEM IN NUCLEAR SERVICE. THE ORIGINAL CONTROLLERS WERE STILL
BEING REPLACED WITH THE LATER REVISION (REVISION 'G') TO SATISFY
WOODWARD CONCERNS.
POST-INSTALLATION TESTING OF THE NEW CONTROLLERS REVEALED THAT
HIGH EMI/RFI LEVELS AFFECTED THE NEW CONTROLLERS, WHEREAS THE
ORIGINAL CONTROLLERS WERE UNAFFECTED. WORK IS PROGRESSING TO
IDENTIFY THE EXACT CAUSE OF THE PROBLEM AND TO DETERMINE A
SOLUTION. IN THE INTERIM, THE TWO UTILITIES HAVE PLACED THE
ORIGINAL CONTROLLERS BACK INTO SERVICE TO KEEP THEIR EMERGENCY
DIESEL GENERATORS OPERATIONAL.
A FOLLOW-UP REPORT WILL BE PROVIDED NO LATER THAN JULY 31, 1998.
COOPER ENERGY HAS NOTIFIED ALL THE AFFECTED SITES INCLUDING
SOUTHERN NUCLEAR OPERATING COMPANY (VOGTLE PROJECT), TU ELECTRIC
COMPANY (COMANCHE PEAK), AND STP NUCLEAR OPERATING COMPANY
(SOUTH
TEXAS PROJECT) OF THIS 10-CFR-PART-21 REPORT. THE NOTIFICATION AS
RECEIVED DID NOT INDICATE THAT THE COMPONENTS WERE INSTALLED AT
SOUTH TEXAS.
