ML19316B074

LER 80-052/03L-0;on 800506,svc Bldg Vent Monitor Was Declared Inoperable When Alarm Would Not Clear in Conjunction W/Erratic Upscale Readings.Probably Caused by High Frequency Welding.Design Change Has Been Initiated

ML19316B074
Person / Time
Site:	Sequoyah
Issue date:	06/04/1980
From:	Hereford J TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19316B065	List: ML19316B064 ML19316B074
References
LER-80-052-03L, LER-80-52-3L, NUDOCS 8006110276
Download: ML19316B074 (2)

Text

= .

.

j- .,... ..

.

.

e

-

.

/~ nt,c a onu -d. is.5 NurLu r; ntcus .sior.v cn .wssine, .

it ??l

.

LICI'J:Str EVENT ftEPOf tT EXtitBIT A

'

co w ni s c w [.. L.] _[  ! 1. JO inv. .t rw,r on 1viot notm to .senra. .uio .,

E, E]. I,T l Nl......u. S I N_L,,,,Pj.1_f@.L.O ,, .

I O I .j,0_L..<OL. ,. .. - OLO_L.Ol _LO.l_01GL. . . ..

f4L.1J u .. .I@JGL .1 o 1_L.J..J.J C O*,' T O'd LLJ@lf, L1LDL.Q..L.<O.L.3.L111XCL.ol.5 L0,L.t..LaJ. a,.K$l,n. .L6..J 4J _

I, o I ' .I m . . . . . . . . . n. 0.L,3. a  ! O..l@

,

rvc u t t cme n , .no m.:ws r t. cur,:i . .. n (P)

[i-[-] l Service building vent monitorjiSt-90-132B).yss f.eg.lar_cd_ inoperable _ t. hen i Eg i the alarm would not cicar in _ct_njungt; ion,ylth,erwic_ypjicale readings - I ggl probably caused f rom high fregt,iengy welding. Monitor in re,iuired to be I

_

g gperabic per STS 3.3.3.10. There was no danger _to the health and safety I _

i ,. i ., i g of the public. Previous occurrences - ncne. Redundant sampling method i g ; manual grab sac:ples. ,

l

'

E, G. ,I ___ _ ..._..___.__ _ --._

u

,W r. a .,r t r n-

• Sc.. '.t .4 (c 3 <*s?,

tur ri ( r . . r *. 5 . f C T4,. sy,,.r gr rs it,. _ _.t.;

~

-

Im

, LH1.r,_JO L,,B.JG l..A_JC'9

, ,s I Il N I s iT I a tu 18 L,3, ]O L.7.J G

. .

12 ,,

.,,....,,.. ,,<,....,,, ,,..... . . . . ,

,a...... . . . . . .. .. .. , , e ... . . . ..

.

O .;,", .,C' la 101 L,,J L. ol 5 ! 2J., L,<J l,s.L11 L91 n ,, i ,

. L.tJ 2 1.J

N 'p? 'f'."-!, yll1 ' '.'. . 5 :;',..';.y' ,;. . f) a.'. ' : ,"' ;;' , ,S.*;'>j . '".'"".,';',

.

. '7' N.E .,

lZEE.JO IlJO JJ .

LZJ@ 4l 01 01. 0 0i L.NJ@ [N,jg Lyj O j 3,0,Lpj3_J,{

.: 4 4y ag g; gp c..a.,,,_...~,.,e. . ,,,. 4 e n v , ac n. ..,.. ( . , ,.

[TR [ Radiation c:onitors are suscept_f bic to,,hinh _upacale resulings .cni.rp ,J.Jy J b.,] l hig.h_f_reguen cluelders . A Design,_glange Peqtiygt;_,han baon._iqitjated.10 I

, , g correct the probicm. , , _ , _ __ g

[ m L__ - -

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

I

, EL-] ! . . _ . . _ _ _ --

_ _ . _ . - _ . . _ . _ _ I

' k'l . . . o.

. ....,.. . O ; 7 ' ' , '. ' . , . . . . . . . .

EQ [B._JQ [0,[0_LOj(~,i.l N/A _ ,,_ _ j LA J'/.Lor prator cheervation -

I

'

' ' . ' , , . , , . ': " ' " ** <. >>

..... ..

_ ..u,.... ...t..., .. .. s i , .r .- n ,,, . ( ) e,, ...,.....t. . /~ !

l@j [3]81) LZ.}{'is! N/A _j [_W_A

~

l

'

t

,. . .. , .lj , . , r /..'. ., " "' "

.. . ..., , . . . . ,,, .., G) '

['~.E] LO.LOL_a'i;gj0 .L N/A 1

.n,.. ;' ' . n,' . .. ,. (li)

' ' " "

., ..,,, .

.. . . . .4.,,, .

- Q [0,L e OL_0.,,Q3l N/A j

, i ,, .,,

-

n ,

.,..e. u.

g , . ., c,a e . . re

. ., .s.gg

, ,, , ,.t

. .

-

8, L, ZJS.l., N/A 1.

m -

..,

"t" u.s a

' " .. ..'IS I;'").'l .7,...N/A L., E

,,,,.. Q I r . ,, .. , .L. LLI ! 1 ! ' ! 1 I ! I .

'

,, .. v, o , ... .i .. ,.o , ,

J. M. Hereford ..,,,,r 635-6!.2. .- 029 1.-

.

8006110 M g

_ _

-- .--- _.

f .. .

.

.

EVAllfATIOf! LOGIC FOR PART 21 sQno-50-327/

Originating Document No. 80052 and PF(

1-60-1(

Yes 33, X

I. Deficiency of a plant security system?

X

1. Could defect create a substantial safety hazard?

If yes, report as part 21.

\ -

II. Is the component necessary to ensure:

X

1. The integrity of the reactor coolant boundary?

.

. 2. The capability to shut down reactor and maintain X it in a rafo shutdown condition?

.

3. The capability to prevent or mitigate the

'

consequences of accidents which could result in potential cf f site exposure comparable to those X

,

referred to in 10 CFR 100,117

'e III. Is defect in a basic component one that has been X

'

accepted for owne-ship?

~

Installe.d for use or operation? X

-

If a yes in II and III above, could defect create X

- a substantial safety hazard? ,

1

~

If yes, report as part 21. l 1

IV. Is defect in a basic component:

.

A condition that could contribute to exceeding X

"

of safety limit? j

-- l If yes to one of II and IV above, report as part 21.

0

-

.

ll -

1

-

.