ML20248A167

Interim Part 21 Re Enterprise DSR-4 & DSRV-4 Emergency diesel.Post-installation Testing Revealed,High Em/Rfi Levels Affected New Controllers,Whereas Original Controllers Were unaffected.Follow-up Will Be Provided No Later than 980731

ML20248A167
Person / Time
Site:	Vogtle, Comanche Peak
Issue date:	05/22/1998
From:	Defronzo P COOPER ENERGY SERVICES
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-PT21-98 NUDOCS 9805290304
Download: ML20248A167 (4)

Text

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May 22,1998 Our Ref: OCG 10483 (K5fa43)

Document Control Desk U.S. Nuclear Regulatory Commission ,

Washington, D.C. 20555

Subject:

10 CFR 21 Notification, Enterprise DSR-4 and DSRV-4 Emergency Diesel i

DearSir:

In accordance with the retirements of the Nuclear Regulatory Commission Title 10, Chapter 1, Code of Federal Regulations, Part 21, Cooper Energy Services (CES), a division Jf Cooper Cameron Corporation, provides initial ratification and an interim report of a 10CFR Part 21 evaluation associated with the 701 Digital Speed Control, Rev. G Installed at Southem Nuclear Company's Plant Vogtle and Texas Utilities Commanche Peak. j Discussion:

These digital 701 goveming systems are manufactured by Woodward Govemor Company of Fort Collins, Colorado and sold by Cooper Energy Sen/hes as part number 2-02G-110-001, Woodward part number 9903 466, Revision G). Revision G is the only revision of the subject part that has the potential problem. The Revision G controller design was recently introduced by Woodward to address an anomaly found during laboratory testing of the previous conf guration. Evaluations conducted by CES and the two affected utilities at that time determined that this anomaly was not credible in nuclear service. Nevertheless, the original controllers were being changed to the later revision to satisfy the Woodward concerns.

An application problem has been identified with the Remion G acward 701 Digital Speed Control used on Emergency Diesel Generators. It was .rountered during the spring outages at both Southem Nuclear Company's Plant Vogtle and Texas Utilities Commanchie Peak Stations.

During the outages, the Woodward 701 Digital Speed Controllers were being upgraded from the original revision provided to the utilities by Cooper Energy Services, to the current Revision G control. Post-installation testing revealed that high EMI/RFI levels affected the new controllers, whereas the original controllers were unaffected.

Cooper Energy Services is warking to identify the exact source /cause of the problem, detemiine the solution, and evaluate the 10 CFR Part 21 applicability. In the interim, the two utilities have \{

placed the original controllers back into service in order to keep the diesel generators operational.

O 7 9805290304 990522 4 l

PDR ADOCK 05000424: /

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, Page 2 May 22,108 Ref: OCG-10483 (K5fa-43)

A follow-up report will be provided no later than July 31,1998.

Affected Sites:

1 Southern Nuclear Company, Plant Vogtle Texas Utilities, Commanche Peak Station l

STP Nuclear Operating Company (Houston Light and Power Co.)

Sincerely, COOPER ENERGY SERVICES Peter DeFronzo General Manager Copies to:

Mr. Louis Ward, Southem Nuclear Company (Fax 205-992-7885)

Southern Nuclear Operating Company Vogtle Project P. O. Box 1295 Birmingham, AL 35201 j Attn: Mgr., Nuclear Engineering and Licensing l Mr. Stephen Alexander Nuclear Regulatory Commission QA Vendor insp. & Maintenance Branch One White Filnt North Mailstop 9A1 '

Washington, DC 20555 l

TU Electric Company P. O. Box 1002 Glen Rose, TX 76043 Attn: Group Vice President, Nuclear STP Nuclear Operating Company South Texas Project Electric P. O. Box 289 Wadsworth, TX 77483 Attn: General Manager I Nuclear Assurance and Licensing

1 E0!RN SERVICES h

• QUALITY ASSURANCE DEPT.

'pf 150 LINCOLN AVENUE GROVE CITY, PA 16127 PHONE: (724) 458-3575 FAX:(724)458-3461 DATE: 5/&Ud TO: A/[d _

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COMPANY: FAX: N/ * [/d -*[/$~/

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NUMBER OF PAGES INCLUDING COVER: d PLEASE CALL (724) 458-3575, IF YOU DID NOTRECEIVE ALL OF THE PAGES 1

PLEASE NOTE eOUR NEW FAX NUMBER IS 724-458-3461.

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GENERAL INFORMATION or OTHER EVENT NUMBER: 34281 LICENSEE: COOPER ENERGY SERVICES NOTIFICATION DATE: 05/22/98 CITY: GROVE CITY REGION: 1 NOTIFICATION TIME: 16:10 [ET)

COUNTY: STATE: PA EVENT DATE: 05/22/98 LICENSE #: AGREEMENT: N EVENT TIME:  : [EDT]

DOCKET: - -- LAST UPDATE DATE: 05/22/98 l 1

l NOTIFICATIONS GENE KELLY / REG 1 RDO STUART RICHARDS/NRR EO

.(C NOTIFIED BY: PETER DeFRONZO AL BELISLE/ REG 2 RDO 3 HQ OPS OFFICER: FANGIE JONES JOHN PELLET / REG 4 RDO VERN HODGE NRR EMERGENCY CLASS: NOT APPLICABLE i l

10 CFR SECTION:

CCCC 21.21 UNSPECIFIED PARAGRAPH EVENT TEXT j i

.gl0%FR@PART21' NOTIFICATION-ENTERPRISEDSR-4ANDDSRV-4EMERGENCYDIESEL AN APPLICATION PROBLEM HAS BEEN ASSOCIATED WITH THE 701 DIGITAL SPEED CONTROL (REVISION 'G' CONTROLLER DESIGN) INSTALLEe 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 SOUTHERN NUCLEAR OPERATING COMPANY (VOGTLE .

PROJECT), TU ELECTRIC' COMPANY (COMANCHE PEAK), AND STP NUCLEAR OPERATING f COMPANY (SOUTH TEXAS PROJECT) OF THIS 10-CFR-PART-21 REPORT. i l

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