ML19270H477

LER 79-025/03L-0 on 790719:reactor Protection Sys Channel a T-cold Input Fluctuated.Cause Suspected to Be Intermittently Open Temp Element or Connection at Element. Repairs Implemented

ML19270H477
Person / Time
Site:	Calvert Cliffs
Issue date:	08/17/1979
From:	Heibel R, Rizzo P BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19270H475	List: ML19270H474 ML19270H477
References
LER-79-025-03L-01, LER-79-25-3L-1, NUDOCS 7908270484
Download: ML19270H477 (1)

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LICENSEE EVENT REPORT

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AEPORT DATE 7 8 60 61 GOCn ET NUYSER 68 69 EVENT DATE EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h o12 I While conducting cost refueling start-uo testine (oower ascension testine), o.PS I o 3 i Channel A variable over power trip indicated reset alarms in rapid succession, and I o ., l high power trips were also received. RPS Channel A T-cold inout was fluctuating. l ois  ; Channel A high power trip was bypassed in accordance with T.S. 3.3.1.1 at 2:30 am I a s I on 7-19-79. Channel A high power tric was returned to service at 7:25 am on 7/19/79.

oi7i i Three redundant channels remained in oceration during this event. A similar event j 3is,; was reported in LER 78-44 (U-2). t 80 7 5 9 SYSTEM CAUSE CAUSE COMP. tALVE CODE CODE SUSCOOE COMPONENT CODE SuSCOOE SveCOOE 7

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, , . i erature element or connection at the element. Maintena,ce Recuest No. 0-79-2212 i

, .,  ; remains open for future action if croblem recurs, or future troubleshooting durine  ;

,,_ l an outage allowing access to the Channel A tercerature elements. ]

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