ML20151R544

Special Rept:On 880314,diesel Generator 2A Had Two Invalid Failures & One Valid Failure.Caused by Lack of Movement from Fuel Pump Hyme Joint.Dirt Cleaned from All Exposed Areas of Fuel Pump Shafts & Hyme Joints & Generator Started

ML20151R544
Person / Time
Site:	Catawba
Issue date:	04/13/1988
From:	Tucker H DUKE POWER CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
NUDOCS 8804280021
Download: ML20151R544 (2)

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a DUKE POWER GOMPANY P.O. BOX 33189 CHARLOTTE, N.O. 28242 HAL B. TUCKER reLernown voca rassmart (704) 373-4531

- uma4s emoscernos April 13, 1988 Document Control Desk U. S. Nuclear Regulatory Commission Wash 3.ngton, D. C. 20555

Subject:

Catawba Nuclear Station, Unit 2 Docket No. 50-414 Special Report Gentlemen:

Pursuant to Technical Specification 3/4.8.1.1.3, please find attached a Special Report concerning a valid failure and two invalid failures of diesel generator 2A which took place on March 14, 1988.

Very truly yours, r/h ^W Hal B. Tucker JGT/81/sbn Attachment 3

xc: Dr. J. Nelson Grace, Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 i Mr. P. K. Van boorn l NRC Resident Inspector Catawba Nuclear Station I

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8804280021 880413

{DR ADOCK 05000414 DCD

SPECIAL REPORT CATAWBA NUCLEAR STATION, UNIT 2 DIESEL GENERATOR 2A VALID FAILURE AND 'WO INVALID FAILURES WHILE TROUBLESHOOTING DUE TO FUEL INJECTION SYSTEM BINDING While performing the operability verification of Diesel Generator (D/G) 2A on i March 14, 1988, at 1047 hours0.0121 days <br />0.291 hours <br />0.00173 weeks <br />3.983835e-4 months <br />, the D/G failed to start during Start number 514.

This was the fourth Valid Failure in the last 100 Valid Starts on D/G 2A and the second in the last 20 Valid Starts. The surveillance interval has been increased to every 7 days following this Valid Failure, which is in accordance with

~ Technical Specification Surveillance 4.8.1.1.2. There have been 7 Valid Failures within the last 100 Valid Starts on Unit 2 D/Gs.

Invalid Failure Start numbers 515 and 516 were performed at 1145 and 1159 hours0.0134 days <br />0.322 hours <br />0.00192 weeks <br />4.409995e-4 months <br />, respectively, to troubleshoot the cause of the Valid Failure on Start number 514.

Close observation of the D/G's Fuel Injection System during the troubleshooting start attempts revealed a lack of movement from a fuel pump hyme joint. Work Request 39738 OPS was originated at 1206 hours0.014 days <br />0.335 hours <br />0.00199 weeks <br />4.58883e-4 months <br />, to correct the problem.

Mechanical Maintenance personnel cleaned dirt form all exposed areas of the fuel pump shaf ts and hyme joints. At 1406 hours0.0163 days <br />0.391 hours <br />0.00232 weeks <br />5.34983e-4 months <br />, Invalid Test Start number 517 was performed to functionally verify proper fuel cack operation. The D/G started  ;

normally, maintained proper speed, and no further binding occurred during the test.

Valid Success Start number 518 was performed at 1446 hours0.0167 days <br />0.402 hours <br />0.00239 weeks <br />5.50203e-4 months <br />, on March 14, 1988.  ;

! D/G 2A was unavailable for 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />, 59 minutes, as a result of this problem.

Unit 2 was in mode 4, Hot Shutdown, during this time. The availability of offsite power and D/G 2B's operability were verified as required by Technical Specifications. ,

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