ML20040B150

LER 81-066/03L-0:on 811201,during Surveillance Testing,Main Steam Line High Flow Sensors RE22C,RE22E & RE22F Tripped at Values Greater than Tech Specs Limit.Caused by Instrument Repeatability & Drift.Sensors Reset

ML20040B150
Person / Time
Site:	Oyster Creek
Issue date:	12/31/1981
From:	Pirooz H JERSEY CENTRAL POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20040B148	List: ML20040B147 ML20040B150
References
LER-81-066-03L, LER-81-66-3L, NUDOCS 8201250213
Download: ML20040B150 (1)

Text

t . ==meemene . , , ., m

,,4 . e s & w W ** V n..% .a a M e e 45 0 ** . 6 e's e h v. 6 6 e s + + e ..a

' v *?.s 2.4 } 4. . .e ,

E.:::' r * -' -

u.s.svuGLLan aset ukAeuniv cuMMpbouN watC e lH M Jbt, *

" 3 LICENSEE EVENT REPORT CO.NTHOL ULOCC l l l j j ,__ 3 o lh (PLCACC PRINT OR TYPE ALL REQUIRCD INFORMATION)

TIE [ N lJ l 0 l C l Pl 1 j@l 0 l 0l- l 0 l LICLNSE 0 l 0lNWMubH 0 l 0 l _ l 0l 045 l@[ 4l 64GLN>L 21, 1 l 1 l1 TYPL[1j@l JJ h3_i l@

4 T bJ 6 V L4GLh5CC COOC 34 is JoN'T M (($ l I,l@l 0 l 5 l 0 loccxhTNyugCH 0 j 0 l 2 l 1l9 l@G3 l 1 12 10 l 1 lR l1 l@l1 74 73 i 244GPQ8T l 3 lQ1ATEl 8 l1GQl@

L4 4.VCNT QATC d 60 ci CvCN r DCSCHIPTION AND PROUAULE CONSCQUENCCS h 3 j ;. j l During surveillance testing, the Main Steam I,ine Ilich Plow Sonsors RE220 l RE22E an'd RE22F tripped at values greater than that given in table  !

3.l.1 sections B.2 and B.3 of the Technical Specifications. The saforv i 7; ,, ; ;

q .- j ; significance is considered minimal because the redundant sensors in each l

- , ,q , circuit, RE22G, RE22A and RE22B would have activated within the desired I

,q ,7 ; limit to initiate the required main steam isolation functions. I I

GTil 1 QQ SysTCM CAUSC CAUSC COMP. VALVC OOS; .caas Sv0CC04 CCt.t#GNC.NT ;QOC S L' ?uCCQQC ivi i c l ol@ l xj@ l zl@ ,l I l NlS lTlRlU lh lCOCDEE l@ .O[z_l h

., 3 10 il 12 33 IS 30 SCOU CNTI AL QCCURRENCE RCPORT 4GV8580N HLPOHY NO. COQG TYPC N O.

W

_.L V L tJ T Y L A H

@ llgfgg . .o) 18 l11 1-1 10 16i6l lA l 013 I I-I LoJ

. 21 22 ;J 24 3G 27 33 03 30 31 J2 AC TI C's FL Tustr CFFCCT SHUTOOWN ATTACHMCNT NPRO 4 Pfl3ME COMP. COMPCN CNT TAKiN ACTsord ON PLANT METHOD HOURS. &WOMATTCO PORM bW0. SUPPUEH MANUFACTUNCH IliJ@lc.j@

JJ J4 lzl@

J's LZJ@

Ju 1 0 1 01 of 37 40 I

U@

en l Y lh 42 L

l43l@

l I l2 l0l4lg 44 47 CAUSC OCSCRIPTICN AND CORACCTIVE ACTIONS

]T]l The cause was attributed to instrument repeatability and drift. Sensors I 7ql RE22E and RE22F were operating outside of their design accuraev, and I sensor RE22C was operating withiri design accuracy. All three were reset i g]l pjl to trip within the required limit. It is planned to replace these sensors l

-l q [

with a qualified sensor of improved accuracy during a future refuelino i ao

" ,2ciu Tv outage. ucTHOD O, S Te.T u s e.POWUH OTHCH STATUS @ OBSCOVCHY OlGCQVCRY OCsCH6PTION h g l E j@ l 0 l 9 l 8g)l NA J l B l@l Surveillance Test l A T 8 VI TY CONTENT flL L.C AS C OF HCLCASE AMOUNT OF ACT6VITY LOCATION 09 HGLCA&E NA l* l NA l ElIi_1@O u 9 50 l Z l@11E i tH50NNLL C APOSVAEJ 44 45 gg rs u r.iu g a TYPE O iSCRIPTION NA El101Ol01@lZl@L l PE RSONNE L INJV ICS .

tcJMGCR 3C$Cfhr i n ' N NA l EJ l 01 0 I ol@L.--

9201250213 811231 80

[055 or on oO.iAceSo u . <

i PDRADOCK05000g TYPE OC5CHIPTION . S io y 10 60 PU0LiCiTv /~, r i NRC USE ONLY O

llll[!!!!lll l 7,1 h,.,aSLUCD( N lhl L5CHIPT10N NA

., io

\.. ,

l Go Go 49. T.

umrospm.a Ilamid ..P.iro.o,z e t , o ,, e . (609) 971-4418 {