ML20150E155

LER#78-109/03L-0 on 781020:during Refueling Surveillance Noted That Steam Generator 1D Level Channel IL-538 Was 5% High,Exceeding 2% Loop Tolerance.Caused by Blocked Instru Line Leading to Transmitter.Line Subsequently Cleared

ML20150E155
Person / Time
Site:	Zion File:ZionSolutions icon.png
Issue date:	11/17/1978
From:	Hansen P COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20150E154	List: ML20150E152 ML20150E155
References
LER-78-109-03L, LER-78-109-3L, NUDOCS 7812110163
Download: ML20150E155 (1)

Text

NitC f OllM 3% U. S. NUCL L All llL G U L A I Ol!Y COf.it.iiLSION (7 71) .

,, LICENSEE EVENT REPORT CONTROL DLOCK: l l l l l b

lh (PLE ASE PRINT On TYPE ALL REQUtnED INFOnMATION) o l 1 l l T l Ll d Tl d 1 l O l0 l _ ln LICEN',E l n ln NUMuCH l 0 l n l _l n l n2b h h l1 l1 l 1l1 hl l l 7 46 9 LILEN:,LE LOl>L 14 l '., 2t, LICLNLE T YPE .60 8, / L A I bd CON'T 10111 7,,"'c l Ll@l 0l 5 l O l 0l 0 l 2l 9 l 5 @l l l 0l 2 l nl 7 h/4 l@l1 l l ll l 7 l 7 l L}@ l 7 U OO Gl DOCP.E T GUMUE H M L') L v t N T ,O A T E 7b HEPOHT DAIE 80 1 EVENT DESCRIPTION AND PROUAOLE CONSEQUENCES h l o 121 l Durina re f uelinct surveillance, mechanics discovered that steam cenerator 1D1

[o l3 l l level channel IL-530 was 5? hich, exceedina the 29 loon tolerance. This I l o l 41 l is non-conservative for steam flow-feed flow mismatch coincident with low l jol5l lS/G level and low low S/G level reactor trips as presented in table 3.1.1 l lo is l [of Tech. Spec. As the redundant channels were onerable and available, I

( o l 7 l l the health and safety of the public were not affected.

l t o la l I I 7 8 9 .

80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SU0 CODE COMPONENT CODE SUBCOOE SUBCOCE 10191 7 8 IT l A l@ l P l@ l P l@ l T l MI S l TIR I Ulh l T l@ l Z l @

9 10 11 12 13 18 19 20

,_ SEOUE NTI AL OCCURRENCE REFORT REVISION gE EVENT YE AR REPORT NO. CODE TYPE N O.

@ nj=q a rpo 1718 I 21 ;2 l-l 23 11 I nio l 24 26

1. I 27 ini3J 28 29 f r. I 30 l-l 31 I ol 32

. ACTION FU1URE EFFECT $ H U T D 0'.*lN A TT A C M W NT Np A D-d P AlW COUD. COYpONENT TAKEN AC1 CN ONPLANT METHOD HOURS 2 SUCYITT E D F Ofit.1 bu8. SUFFLIE R MANVF'CTur:n 1_j@i"i@

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3b lo Inl nInI 31 40 Luj@

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42 Ln_j@

43 lPli12inif d4 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS lilollAn instrument line to transmitter was found b]ocked. After the line was  !

ji jil l cleared the transmitter, Fischer Porter model f'13D2495KnBAnn-NS, was re- ,j ii i7j l calibrated, checked, and returned to service. ro further action i s renuiredi.

i l3] lTo prevent further occurrences, instrument lines are beina blown down each I tii4 i trefuelinc outage. I 7 8 0 80 ST S  % POWER OTHER ST ATUS D CO FY DISCOVERY DESCRIPTION l1l5lIHl@ lnl0lnl@l *ip l [n ,.j@[B_e fue l i nn Outace Surveillance l TlVITY CON TE NT AELE ASED or nELE ASE AMOUNT OF ACTIVITY LOCATION OF RELEASE

!I E8 7 7 Ub Ub i 6 9 10 tI 44 45 80 PERSONNEL f APOSUnES NUMuf4 T YPf CE SCRIP TION 0 ~MA ill7 I 8 9 0101@l C l@[13 11 11 60

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PinSONNE L INjulHES NUYllt fl OLSCRIPTION l1 lh l 7 U D 0l0l0l@l 11 1/

NA 80 l

LOSS Or Ost DAMac.t to r AcatITY .

TYPE Ot sc hip t ion 11[9] @l MA l s u u to Bo PuuticirY NRC tlSt. ONLY i 2 l _n l IV.UtMl p@Dl l 5CH.PTION NA l lllllllllllll

( 8 ] 2.1 1 O f (n T Paul Um. Hansen 312-746-2004 ', o cu ext. 244 * * -