ML20147C914

/03L-0 on 780904:RCIC Isolation Channel a Tripped Momentarily,Causing RCIC Sys to Be Inoper,Due to Defective RX-2 Relay

ML20147C914
Person / Time
Site:	Brunswick
Issue date:	10/04/1978
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:
Shared Package
ML20062A396	List: ML20062A390 ML20147C914
References
LER-78-059-03L, LER-78-59-3L, NUDOCS 7810130181
Download: ML20147C914 (1)

Text

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17 77) 1 LICENSEE EVENT REPORT i O \

V lh EONTROL BLOCK: l l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6  ;

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l 1 l TYPE CON'T 10111

/ 8 S unCE i Ll@l0i5 l0DOCKET 60 61 l- loNUMBER 13 l2 l4 l@l0 19 68 63 lo h l7 l8 l@lII0l01417 l8 80l@

EVENT DATE 74 7b REPORT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h Io l2l l RC,I_C isolation channel "A" tripped momentarily causinn the RCTC system to be l lol3l l inoperative. A control room annun :iator indicated the trip was caused bv a steam i  !

Iol4l l leak detector signal. (Technical Specification 3.7.4) l l o 151 1 l l0 l6 j l l l0l7ll l l0l8l l  !

1 8 0 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUSCODE COMPONENT CODE SUBCCDE SUCCODE lol9l 7 8 9 l Cl El@ l E lh l A lh lR l El Ll Al Yl dh l Alh l 7lh 10 11 12 13  % 19 10 SEQUE NTI AL OCCURRENCE REPORT REVISION

_ EVENT YE AR REPORT NO. CODE TYPE NO.

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32 TAKEN A O ON PL NT T HOURS SUD IT D FOR b B. U PLIE M/ FACTUFER W @l34 l@ lZl@ l30Z l@ l0 l0 l0 l0 l dh 41 l Ylh dh l Pl 2I 9l 7lh 33 35 3/ 40 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i1l0Il The RCIC system was reset and onerable within six minutes after the i nnl a ti nn I 11 l ij l occurred. A defective RX-2 relav caused the false isolation and uns roninco? 'ru c !

i, ;7, l is considered an isolated incident and no further corrective action is reouired. I 11 131 l l l i 141 l I 7 8 9 80 ST S  % POWE R OTHER STATUS i O Y DISCOVERY DESC ALPTiON l1 ls ) l E l@ l1 l 0 l0 l@l NA l lB l@l Operator observation l A TIVITY CO TENT RELE ASED OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RELEASE I1 IG8 9I l Z l h l10 Zl@l NA l l NA l 1 11 44 45 30 PERSONNEL EXPOSURES NUMBER TYPE DESCR6PTION -

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' NUMBER D ESCRiP TION li lR 8I l90 l 0 l 01@l NA l 7 11 12 80 LOSS OF OR DAMAGE TO FACILITY TYPE DESCRIPTION y lZl@j NA l 7 8 9 to 83 ISSUE DESCRIPTION y.

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