ML20028E964

Updated LER 82-043/03X-1:on 821028,during Mode 1,w/east Scram Discharge Vol Level Switches Under Test,Magnetrol Level Switches 82D & 82F Would Not Trip on Command.Caused by Misaligned Upper Switch Contact Mechanisms

ML20028E964
Person / Time
Site:	Dresden
Issue date:	01/10/1983
From:	Whalen R COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20028E960	List: ML20028E959 ML20028E964
References
LER-82-043-03X, LER-82-43-3X, NUDOCS 8301280303
Download: ML20028E964 (2)

Text

._ _ - - _ - _ _ _ ._ -

I , .

mem runarJoe 0m U. S. NUCLEAR REIULATORY CQRabetSSION UPDATE REPORT

LICENSEE EVENT REPORT PREVIOUS REPORT DATE

11/16/82

~

CONTROL sLOCK: l i

l l l l I o

Q (PtEAsE PRINT OR TYPE ALL REQUIRED INFORaAATIOpti lotti 8l I8 l L l D l R l S l 3 lg 0 j 0 l - l 0 l 0 l 0 l 0 l 0 l - l 0 l 0 g 4 l 1 l 1 l 1l.1 7 UCENsEE Coog is 18 WCSNSENUMSER 2h at UCSNSS rYPt #

g 57 GAT 30 l !g CON'T lolil 7 s

"'u g lLso g j l 5 l0l oocxeTmumeen 0 l0l 2l 4[ 9 g j 1l 0l 2l 8l 8l 2 **g [ 0l 1l 1l 0l 8l 3l g as si se - eve =7 oare 75 aeront cars so EVENT DESCMPTION AND PROSASLE CONSEQUENCES h ,

Io!2l l During normal operations, east scram discharge volume level switches were being tes- l .

[TTT) l ted for proper operation. The 82D (set to trip at scram level) and 82F (set to trip l

[ot4l lat rod block level) Magnetrol level switches did not trip when tested (T.S. Table [

I M l3.1.1.). Minirtal safety hazard since redundar.t Barton switches were operable and I I o ls i I would have effected a reactor scram if the volume had become filled above limits. Not lo17I Ieffect on nublic health and safety. Previous event reported by R.O. 82-29 on l IoteI l Docket 50-249. I 7 . .

W *^E co sEEe coupone=r caos suME. su' so l 0 l 9 l' 7 8 l Rl B l@ W@ W@

9 10 it i2

[I lN l S l T l R l U lQ 13 is i S g .es.g Z Limimo ENT YEAM b ,agg _,18 l2 l [-_j l0l4l3l lA l0l3l x g "I u = = = 2, = = si

'i".T 2W! off!Sr '"u4283" ,.ou.s S ^E="r"vro' .;lllTtu'.. '"#,i.c"7- *a"'

i lA u gl4Z lg 2 a lsZ lg W@ l0J0l0("0le as 27 gg ei l N lg

]g lM l['"'"'8 l-g CAust DEsCR PTION AND CORRECTIVE ACTIONS h

, lilol lCause of the Magnetrol (Model 402) failures appears to be misaligned upper switch I l

l 1i # i l icontact mechanisms. The contact mechanisms were replaced on all of the avitches thatt m Ihave failed. Comparative X-Ravs were taken to verifv proper magnet switch assembly l tii31 Iadiustment and week 1v tests were performed on some of the switches with no discre- I

, , , , , ;pancies identified. ,

7 e so srA  % power oTHtRSsArus os R otSCOV oESCRiPrio.4 I i ! 5 I [,EJg l 0 l 4 l 9 [gl N/A l gl ' Surveillance Nsting l

7 s ,j,y,7, e,jj7,,, is n ** * = so meL Ass N/Aamou=7 on activity h ll N/A . LocArion on metaAss h Ii' ie* l*W @o' onascaAssQl " * **

l penso==eL exposuEas uvueen rves l,l7ll0l0l0 @ ] @loascairrio= @N/A l einsouwe'O.uu'das "

muussa cascairrionh It j a l l 01 Of 0l@l N/A l

'g c, o "

l i f 9 l J@f.,cjio. urv l N/A g l eveueirv 8301280303 830110 "

issure oascairriom b PDR ADOCK 05000249 NRC USE ONLY ,

i: f o i LNjhl N/A S _ _ _ _

PDR I IIiiilltiiiil{

7 e e io es se so. :

Robert J. Wnalen 815-942-2920, X-523 .

NAME OP PREPARER PHON E: S, [

I .

. SUPPLEMENT TO DVR '

DVR No. -

STA Uti!T. YEAR NO.

O' - 12 -

3 -

82 - 71 PART 1 iTITLE OF 4 VENT Scram Discharge Level Sensors OCCURREg0/28/82 1030 Calibration and Functional Test Failure DATE TIME -

, REASON FOR SUPPLEMENTAL REPORT To provide update on actions taken regarding ifagnetrol failures.

PART 2 l bn......

1 ACCEPTANCE BY STATION REVIEW '

> /

g

.-  %, usG Wk SUPPLEMENTAL REPORT APPROVED .

/ /

AllD AUTHORIZED FOR DISTRIBUTION \ 4 M Vo ///f/f.3 STATIONSUPERINQNDENG DATE

.i e

i l

1 O

~--w --g, ., _

,, , y__ . .