ML20150E109

/03L-0 on 781020:during Refueling Outage Surveillance,Noted That Feed Water Flow Xmtr 1LT-531 Had Shifted in Excess of Tech Spec Limits.Caused by Transmitter Drift.Xmtr Recalibr & Channel Returned to Normal

ML20150E109
Person / Time
Site:	Zion File:ZionSolutions icon.png
Issue date:	11/17/1978
From:	Rogers C COMMONWEALTH EDISON CO.
To:
Shared Package
ML20150E104	List: ML20150E103 ML20150E109
References
LER-78-106-03L, LER-78-106-3L, NUDOCS 7812110129
Download: ML20150E109 (1)

Text

' NHC f OllM 3,0 U. S, NUCLL All llLGULA l OILY COMMISSION (7 77) 4 LICENSEE EVENT REPORT y CONJROL DLOCK: []

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l@ (PLEASE PRifd7 OR VYPE ALL REQUIRED INFORMATION) l0 l 81U l l Tl T, l 7l I lC l 1 l@l 0l 0 l- l 0 l0 l0 h l0 l-l0l0l@l4 l1l1l1l1l@l l l@

7 LILLNLt.i. LOUL I4 lb LICENLE NurJULil h 2t> LICLful TYPE .10 bl L A I t.d CON'T ioi1l [,] l L l@l 0 l 9 l n l 0 l nl ? lq l 5 l@l 1 l 0 l? l n l 7l r j@l1 l1 l 1l7 l 7 lq l@

l O 60 Gl DOCK E f F4Uf.'U E H (A 03 kVENT DATE 14 75 HLPOHT D AT E HG EVENT DESCRIPTION AND PROBAOLE CONSEQUENCES h l o J 2 l lWhile ner forninn refuelino outane surveillance, naintenance personnel founrl

[ o ly l fond water #10w xntr 1LT-511 had shi#ted hinh bv 1.';". This was non- l lo l4 l l conservative for the stean flow areater than feed #10w uith low S/G level l loislIP" trin as rresented in T.S. Table 1.1.1. "o safety innlications were l t o is i l involved as the redundant channel was onerable. The health and safety of l l0l1J lthe public uns not affected. l l O 18 l l l 7 8 9 .

80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUSCODE COMPONENT CODE SUBCODE SUSCODE IOl9l 7 8 l Il A lh lE lh l E lh lI l Ulb l h El U l 9 10 11 12 13 18 l7 l 19 lE l 20

_ SEQUENTI At. OCCURRENCE REFORT REVISION LE R EVENT YE AR REPORT NO. CODE TY P E- N O.

@ g;'P) ;r 17 Ial l-l 11 l016 l 1/l 1.013l lL I l-l I0I

._ 21 22 23 24 20 27 28 _29 30 31 32

. ACTION FUTUM EFFECT S H U T O O'.*lN ATT A C W'

• N T NPDO-d PDIUC CO"D. COU'ONENT T Ar' 5 N /Si ; , CNPLANT METHOD HOURS 2 SUCVITT E D F ORf.1 bu S . SU'"Lf E R M/NUTACTU"~n ini@iri@

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3-6 3b 3/ 40 di 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h l i l o l l The cause of the out of tolerance channel was determined to be transn.:_tteg

_lililIdrift. (Fischer-Porter nodel E10P,2406P4P vntr). The xntr was recalibrated l l

i, l7; land the channel returned to normal. Action itens are outstandina to studyl l l

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i;3l lanc trend transnitter drifts. "o further action -is recuired. l i jiId i l I 7 8 9 80 1 SI A  % POWER OTHER ST ATUS Di C ' Y DISCOVERY DESCRIPTION l1 IM [JLj@ l n! n ln l@l FA l lP, l@l Re fue li n<T Surveillance l l 7 8 9 10 12 Il 44 45 4G B0 l AC TIVIT Y CONTENT Rf L E ASCO OF R(LE ASC AMOUNT OF ACTIVITY LOCATION OF RELE ASE -

I l IS 7 8 9 to 11 44 45 80 PC RSONNE L [ x POSUR C S NUMLt(O TYPF OC SCntP TION

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~?iA l 7 8 9 11 12 13 80 l'E n50NN E L INNiilE S NUVtli n OL 5Cnl* TION t

l i 191 8 9 1010 10 l@l11 I i Ii 80 LOSS OF Oil D AM A. [ 10 F ACillTY .

T YP( Of 5 CHIP fiON 11ly]l?l@l Un l ei 9 m 80 runtiniY i Di st nip rioN '"

Nnc ust. ONL Y j 7 l _o } lgrodhl MA j l l l l I l I l I l l l I ;,

rfd'1o1*1n100 312-746-2004 ext. 244 _ou cu m, C.L. Roners