ML19256G547

LER 79-060/03L-0:on 791202,while Moving from Mode 1 to 2, Containment Pressure Hi-1 & Hi-2 Trip Status Lights for One Channel Energized on Mcb W/Normal Readings on Containment Pressure Indicators.Caused by Comparator Card Failure

ML19256G547
Person / Time
Site:	Farley
Issue date:	12/28/1979
From:	Hairston W ALABAMA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19256G544	List: ML19256G543 ML19256G547
References
LER-79-060-03L, LER-79-60-3L, NUDOCS 7912310451
Download: ML19256G547 (1)

Text

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- . LICENSEE EVENT REPORT (PLEASE PiilNT OR 1YPL ALL REQUIRED INFOHMATION) cONinOL DLOCK: ,[ l l l l l e

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IoIil E "c[ l L l@l 0] 5 l 0 l 0 l 0 l 3 l 4 l 8 l@l 1 l 2 l 0 l 2 l 7 l 9 j@l1 '/b l HLPORT 2 l2 DAT l 8El 7 l9 l@ 11J I B 00 Gl DOCKE l NUMBElt l'3 G9 LVLNT DATC 74 EVENT DESCniPTION AND PROnAHLL CONSCOUCNCES l o l 2 ] lAt 0400 on 12/2/79, while taking the Unit from Mode 1 to Mode 2, the reactor operator l.

for one channel o i3 gnoticed containment pressure Hi-1 and 111-2 trip status lights / energized on the MCB with l Tech. Spec. 3.3.2.1,.in o 4 gnormal readings on all four containment pressure indicators. [

g ,, gp art,' requires two operable containment pressure channels for containment pressure Hi-1 y

gjaj gand three operable containment pressure channels for containment pressure Hi-2. Tech. ;

The heIllth and safety of the g p q [ Spec. 3.3.2.1 action statement requirements were met.

g g  ; general public were not affected. No similar occurrences were reported. SO l

SYST E M CAUSE CAUSE COP.iP. VALVE CODE CODE SUBCODE COVPONENT CODE SUBCODE SUUCoDE lol9l 7 0

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33 24 33 3G 3/ 40 CAUSE DESCRIPilON AND CORHECllVE ACTIONS h i o h comparator card in the 7300 racks for containment pressure hystables PC952B-1 and l l 1 11 l IPC952B-2 failed. The comparator card was replaced and calibrated ner FNP-1-STP-220.3. I i y [The containment pressure channel wt.s restored to an operable status at 1115 on 12/2/79 i

, 3 jupon verifying bystables PC952B-1 and PC952B-2 cleared. [

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1 U l I I I LLLLLLIui 3 7 n o io ou o.3 NAME or rnLPAiirn W. G. Hairston, III pgnyt. (205) 899-5156