ML20010G937

LER 81-140/03L-0:on 810814,channel 3 of Pressurizer Water Level Instrumentation Discovered to Have Failed.Caused by Improperly Seated Tubing Ferrule in High Pressure Ref Leg Side of Level Detector Sensing Line.Line Repaired

ML20010G937
Person / Time
Site:	McGuire
Issue date:	09/11/1981
From:	Nardoci P DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20010G931	List: ML20010G930 ML20010G937
References
LER-81-140-03L, LER-81-140-3L, NUDOCS 8109220681
Download: ML20010G937 (1)

Text

_

wac acane :ss u. s. uueteen necut.aronv ::.auess2ces tr.rn UCENSEE EVENT REPCRT EXHIBIT A ces.Twet at:<c I I l ! ) I .!g tri.sess rietut on tves att ascuineo i=,onwarn.~.

Ia jil..l N I m,... clM l G l Sl1 IQQl 0l -l0 l 0101010 l- l 0I OlQ{ .4 l 1l 1l1r,.. l 1l@{ ,, m l l, g mo. .. ,. mm. . .. m m . ,

13ei!

a E d@l0 l 5 ; O ; O g 0; 3; 6 ;9e gl0 **

t 8l 1l 4r8l1 g l Og9 l i 1; 8; 1lg i en ei accaat %=s a 8v tat :ar= 't *** car 24ra se avaw? :ssemimCN ANC PSCS A4t{ OCDsSacus.4Cas @

l) 621 IWhile in mode 2. durinc 7ero Power Phvnics Testine. Control Room monitors indit i3,3, lcated that Channel 3 of Pressurizer Water Level Instrumentation had increased yo

, , , , , ,approximately 30% above the level indications of the other three (redundant) ,

i3,3j ichannels, which were in agreement. This failure violates T.S.3.3.1 which is rey g ,, portable pursuant to T.S.6.9.1.13(b). Since failure of the single channel of p .,!Ipressurizer level instrumentation did not prevent the functioning of the reactpr

.24 Iprotective system, the health and safety of the public were not affected. 1

'UE,a" **

• $$E sdS$Ee es=ecaewt ::ce isa "*=e SOIns lTTTI 7 .

I II Al@ W@ {Z:2 l@ [P l Il PIE X i Xg 9 se 11 13 8 t

it lg lg g ;9

. 3C==gm etNC a gveSICM.

eviar m . 18.C,bf earMTiak

=a. - . a.PC.a?

u .,.o . a.

@fg i8 I 11 a  ::

l-l

s l 1I 4! 0 l 2 -

I/l 2r l 6i 3l

= a l1. .l a

ly a

y a

c:: m  ::n:, =:wa-l 0 !% @i 0 l 1 . m ' .;:: n .. : : s :- 2:,7.n::,,

fu 1 @ d, I @ ,l Z l@ (,Zjg

, , u L,YJ@ l N Ig l L!g

. , lZ l 9 l 9 i 9lg c.auss ensemimca Amo c:mascnvs ac :ess @

ti.3, lThe channel failure was caused by a leak (improperly seated tubing ferrule) ing tiet tithe hich oressure (reference lec) side of the level detector se7mine lino. Tt f gcould not be determined whether the tubing connection had been improperly in ,

6,.:i istalled or the line had been physically disturbed. The affected channel was  !

,,,,, ,placed in the tripped condition, and the sensing line repaired and the level ,

a

',Ic:urv svarus transmitter vowea calibratedorwea:T48m*hrogg.dgggs, =ise:vear mise =ven,e,sen.,ne,.@

1i ! s ! {,,X,J@ l O! 0 l 0 !gl Mode 2 l l Afgl Personnel observation l 7

s ,j_,,,,, y ,,,,7 is ta as se m m e. :...< m .

u r o, - @ l _v, . .. .esm. @

l i i e 1 l,,Zj @ [,,,Zjgl N/A

_ l N/A l

' eason

, 'e*6 usesiAss i, ween

ssemirnca@

l i 171 I 01 010 @(,,,Zj@l N/A l

' ' ' .mo,.'d,uJ.a '* =

=umeen li is t8 l.01 Ol 0 l@l12sesemirno f It

@ N/A l gg l

l l,'_,{',,)

g g ;l= " e= =J.r - ~ @ N/A

i. ,,

l

,ssu Y7"semirne @ Nac use cacy N/A , ,,,,,,,,,,,,g 12isiL.!ll81

. i. u .. ,,

.. .r......,s, Phillip B. Nardoci ,,,cu s-~ (704) 373-7432 8109220681 810911 PDR ADOCK 05000369 S PDR