ML17266A214

LER 80-021/03L-0:on 800507,during Normal Surveillance & post-maint testing,1A Diesel Generator Failed to Synchronize to Emergency Bus.Caused by Frequency Permissive Relay Being Set Incorrectly.Relay Setpoint Corrected

ML17266A214
Person / Time
Site:	Saint Lucie
Issue date:	06/06/1980
From:	Schoppman M FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML17208A705	List: ML17208A704 ML17266A214
References
LER-80-021-03L, LER-80-21-3L, NUDOCS 8006170551
Download: ML17266A214 (2)

Text

NRC FORM )OI U. S. NUCLEAR REGULATORY COAIMISSION IT.TTI LlCEINSEE EVENT REPORT I

'0 tPLEASE PRINT OR TYPe ALL RECIUIRED INFORhIATIONI I Li0 II i - 0,'5I tl I Q.~Qa

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EVENYOESCRIPTION ANO PROSASLE CONSECUEiVCES QIO During normal survei'llance and post-maintenance testing (T.S.4.8.1.1.2.

aza missive relay K-49 was discovered to be set incorrectly. This resulted in the inability tol close the 1A DG BKR by manual remote means. It did not prevent automatic cacaos'ing of BKR on a dead bus since this had been demonstrated twice after the mainteriance had been corn leted. T

~o a 1 3 9 first occurrenc 30

~S SYSTKYI COOK CAUS!

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KFPKC CN PLANT CAUS'E DESCRIPTION ANO CORA!Ca IVE ACTIONS Q33 Electrical and II

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HOURS T.S.4.8.1.1.1.A) . The frequency permissive rela had been incorrectl

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ATTACIaMKNT SV8MITTKO LJS LJO MIS 41

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43 accordance with (T.S.4.8.1.1.2.A.4.

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~0 MANVFACTVAKR 33 COMP ON Kal T 41 set'uring routine maintenance the previous week. The MT DG BKR shut suc-cessively on a d rid bus twice after maintenance was complete. The relay

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~as corrected and the surveillance was corn leted successfull a

FACIUTY.

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1 4 I0 I) 44 45 ACTIVITY CONTL'IT RKI.KASKO Ql AKLKSASK AMOUNTQF ACTIVITYQ)S LOCATION aF RKLKAS4 Q)8

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'o 3 a1 ISSV!0 LN WSUC:TY 0 045CAIPT:CN ~ NRC USE ONLY 30

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4 44 49 IO NAME OR PREPARER H. A. Schoppman 305-552-3802

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