ML19269C173

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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:
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 .

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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

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