ML19269C173

LER 78-063/03L-0 on 781222:faulty Comparator in 1A Main Steam Pressure Instrument Loop.Caused by Broken Lead on a Capacitor on Comparator in Main Stream Pressure Channel

ML19269C173
Person / Time
Site:	Beaver Valley
Issue date:	01/22/1979
From:	Werling J DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19269C169	List: ML19269C167 ML19269C172 ML19269C173 ML19269C174
References
LER-78-063-03L, LER-78-63-3L, NUDOCS 7901290268
Download: ML19269C173 (1)

Text

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NRC PORM 364 U. S. NUCLEAR REGULATORY COMMISSION p.m LICENSEE EVENT REPORT CONTROL 8 LOCK: l l l l l l lh (PLEASE PRINT OR TYPE ALL REQUIREO INFORMATIONI i .

ITI' lS l9P l ALICENSEE F

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OATE EVENT DESCRIPTION ANO PROSABLE CONSECUENCES h O 2 l At 1658 hours0.0192 days <br />0.461 hours <br />0.00274 weeks <br />6.30869e-4 months <br />, low steam pressure alarm annunciated in the control room. l E l Instrumentation readings were normal. An investination revealed a faulty l I'OTTI O l comparator in the 1A Main Steam Pressure Instrument Loop. At 1720 hours0.0199 days <br />0.478 hours <br />0.00284 weeks <br />6.5446e-4 months <br />. the 1000 I g i biEtables were olaced in the tripped condition. Redundant instrument channels I ITTTI I were operable and the health and safety of the eeneral public were not ieopardized. 1 O 7 l 175Ts 1 I I 7 8 9 60 SOEE YO$E sis 8CiEE COMPONENT CODE SU8 CO O'E SU E

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,,,, SEQUENTIAL OCCURRENCE REPORT REVISION L EVENT YE AR R EPORT NO. CODE TYPE NO.

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33 J4 35 31 40 42 44 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS i O l The comparator failure resulted from a broken lead on a capacitor on comparator I i i l in main steam pressure channel. The capacitor lead was repaired .'nd ebo -k,nani I g l was calibrated and satisfactorily returned to service at 2100 hours0.0243 days <br />0.583 hours <br />0.00347 weeks <br />7.9905e-4 months <br />, l i a I -

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STA  % POWER OTHER STATUS OB SCOV RY 015COVERY DESCRIPTION i s W @ l0l2l9lhln N/A l lasA l@l Ooerator observation l 7

84 ig, i2 44 de 80 RELEASE LOCATION OF RELEASE @

W [ ,Z,,,,j @D OF RELEASE 8 9 AMOUNTOF

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46

@l N/A l 7 10 11 44 80 PERSONNEL EXPOSURES NUuSER 7

l 0 l 0 l 0 lhl Zl TYPE @lDESCRIPTTON N/A l PERSONNEL NJuRIES NuuBER DESCRIPTION @

t a 8 9 l0l0lOl@l n i2 N/A 80 l

LOSS OF OR OAuaGE TO FACILITY Q TYPE D E SCRIPTION N./

9 lZl@l N/A l 7 8 9 to 40 PUBLICITY NRC USE ONLY y

2 O a 9 W 10 D@l 153UE DESCRIPTION N/A I 68 49 l l l l l l l l l 1 I I liI

80. S NAME OF PREPARER

• M PHONE:

412-643-1258  !

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