ML20238E842

Revised Special Rept:On 870119,diesel Generator Failed. Caused by Lack of Fuel.Day Tank & Fuel Supply Piping Refilled

ML20238E842
Person / Time
Site:	Catawba
Issue date:	09/02/1987
From:	Tucker H DUKE POWER CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
NUDOCS 8709150241
Download: ML20238E842 (2)

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DMCE POWER GOMPANY

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P.O. DOX 33189

'g CHARLOTTE. N.C. 28242 HALD.TUGimR retzs'uoxe vna rassenerv (704) 373-4531 pocomanpeopuovnom September 2, 1987 U. S. Nuclear Regulatory Commission Attention: Document Control Desk i

Washington, D. C. 20555

Subject:

Catawba Nuclear Station Docket Nos. 50-413 and 50-414 Gentlemen:

q Pursuant to Technical Specification 4.8.1.1.3 and 6.9.2, please find atta.hed a revised Special Report concerning the valid failure of Diesel Generator (D/G) 1B which occurred on January 19, 1986. The original submittal dated Febru.ary 18,

'1986 from H. B. Tucker (Duke Power Company) to Dr. J. Nelson Grace (NRC/ Region II) incorrectly assigned the failure to D/G 1A.

Very truly yours, MBr/J u Hal B. Tucker JGT/120/sbn Attachment xc:

Dr. J. Nelson Grace, Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 l

Mr. P. K. Van Doorn NRC Residrat Inspector Catawba Nuclear Station l

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G SPECIAL REPORT DIESEL GENERATOR 1B VALID FAILURE On January 19, 1986 a valid failure occurred on Diesel Generator (D/G) 1B.

This valid failure was the fifth failure within the last 75 valid tests for the Catawba Unit 1 Diesel Generators.

Please note that as of January 19,1986,thI 1A and IB Diesel Generators had only completed 75 valid tests (this includes t$e...

five valid failures).

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-The failure occurred while the IB D/G was running in the fully loaded condition.33 During the test, the fuel supply make-up solenoid valve-failed to open and ed.;

provide. fuel for the IB D/G day tank.

Thirty-three minutes into the test, thN 1BL D/G tripped due to a lack of fuel. To correct the malfunction, the IB D/G da3 tank manual bypass supply valve was opened to refill the day tank. In additiMn, an auxiliary fuel oil pump was used to refill the IB D/G fuel supply piping. The IB_D/G was restarted and verified operable by performing the IB D/G operability periodic test. The 1B D/G was declared inoperable on January 19, 1986 at 2245 and was subsequently declared operable on January 20, 1986 at 1600. Therefore, the 1B D/G was out of service for 17 hours1.967593e-4 days <br />0.00472 hours <br />2.810847e-5 weeks <br />6.4685e-6 months <br /> and 15 minutes. At the time, the surveillance testing interval was 3 days which was in accordance with Section C.2.d.4 of Regulatory Guide 1.108 Revision 1 (Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants).

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