ML20153C643

Rev 1 to 880413 Special Rept:On 880314,diesel Generator 2A Failed to Start During Start 514.Caused by Lack of Movement from Fuel Pump Hyme Joint.Personnel Cleaned Dirt from All Exposed Areas of Fuel Pump Shafts & Hyme Joints

ML20153C643
Person / Time
Site:	Catawba
Issue date:	04/28/1988
From:	Tucker H DUKE POWER CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
NUDOCS 8805060271
Download: ML20153C643 (2)

Text

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{7Q4) 073463) sttLEAa FmoDttM April 28, 1988 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D. C.

20555 Subj ect:

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

Pursuant to Technical Specification 3/4.8.1.1.3, please find attached Revision 1 to the Special Report dated April 13, 1988 concerning a valid failure and two invalid failures of diesel generator 2A which took place on March 14, 1988.

Very truly yours, f

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Hal B. Tucker JGT/9/sbn Attachment xc:

Dr. J. Nelson Grace, Regional Administrator U. S. Nuclear Regulatory Cornission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Mr. P. K. Van Doorn NRC Resident Inspector Catawba Nuclear Station 8805060271 88042s PDR ADOCK 05000414

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SPECIAL REPORT, REVISION 1 CATAWBA NUCLEAR STATION, UNIT 2 DIESEL GENERATOR 2A VALID FAILURE AND TWO INVALID FAILURES WHILE TROUBLESHOOTING DUE TO FUEL INJECTION SYSTEM BINDING While performing the operability verification of Diesel Generator (D/G) 2A on 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 3 Valid Failures within the last 100 Valid Tests 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 from all exposed areas of the fuel pump shafts 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 rack operation. The D/G started normally, maintained proper speed, and no further binding occurred during the test.

Valii 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.

IIR C88-41 '

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