ML20052E928

LER 82-027/03L-0:on 820411 Drywell Pressure Switches PS-4310C & PS-4312C Tripped at 2.35 & 2.45 Psig, Respectively.Caused by Instrument Drift.Switches Recalibr & Tested

ML20052E928
Person / Time
Site:	Duane Arnold
Issue date:	05/04/1982
From:	Hill K IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20052E922	List: ML20052E921 ML20052E928
References
LER-82-027-03L, LER-82-27-3L, NUDOCS 8205110546
Download: ML20052E928 (1)

Text

NAC #0stu 384 U.5.MUCLEAA MtGULATOoY COMMIsatore er.m

• LICENSEE EVENT REPORT couraot stoco l i

I I I I I ,]@.

intam mMT on Tv 4 Au.aecusano iNeormanoNi TTi~l l 4 9 I r!Auc4NsesC00s 10 la le 11 !@l 0101 -1010101 6 is a 101_10101@l ur.&Nsa mumets 24 :e 41113 l i l 11@lSI GAi T 58l@

uc4N44 rv,4 40 con'T 101:1 8

y'}"c' l I,@l0 15 10 10 l o l 31311 @l014 Il li l 8 l 2 @l o l 510141 RI ?I@

8 to 48 GCCK ET Nuug gn 64 De tytNr O A12 38 75 Ra,onr0 Art 40 EVENT DESCRIPTION ANo Pao 8 A8LE CoNSECUENCES 10 g ; During cold shutdown surveillance testing, Dryvell Pressure Switches PS- I gi 4310C and PS-4312C tripped at 2.35 and 2.45 psig respectively. PS-4310C- I g o i.i ! and PS-4312C provide a permissive for contain,1ent spray operation and te I g l rminates op. as pres. is decreasing. T.S. Table 3.2.B specifies trin poi i l o is 1 I nts of between 1.0 and 2.0 psiq. Rodundant switches were tostod satinfar- 1 lalilI tory. Previous occurrences with PS-4310C/4312C R0 78-6. 80-7. and PO-E6- I t o is i l with redundant PS-4311C A0 74-5. RO 76-77. 78-6. 79-17. and An 49 - I I 7 e, ao Co a ccYs' su CNE CouncNaNr coce suscces su loisi t 8 is IR l@ l,E_j@ I F l@ ll I N l S l T l R l U l@ l S l@ [J,,j @

1 to '

it 13 13 is 19 .O 38o,uper AL oCCUAAENCE me, Cat REVfslON oggino VGNe vf AM R$ omr No. c005 vvPt No.

O",ajg (18121 l-l I 01 21 71 y 10131 W l.---! La]

si n :s 2 a ir  : :s ao si n W.'N '?cWEJ oV!b*'r '"w"I"E" ouas @ ^EeTr"Io* ,8!Ws. "s!."E*fa7 wM"IfEEa'en lEl@lZl@

n 2

[ ,Z,_j@

u lu 7l@ 2l010 l0 l 0 l Li,!,j@ l fil@ (filj@

.o es lSI318l2l@

2 .a u <r causs oEscaiPrioN ANo conarcTive -cTions

,,,,,[ Instrument drift. PS-4310. and P 4312C are Static-0-Ring model 6N-AA-21 i

,, ,, , ;-(X9)-VSTT pressure switches. The switches were recalibrated and functio i

?

L' LZJ I.nal.ly: tested satisfactory. A review shall be performed to determine the.

. I g ; cause of these failures and the appropriate corrective action. I i . I I a i sa

's'r**E s ,cwea on.easvarus b EsEoSS N oiscoveny oescaianen @  !

@ LGjg [0 l 0 l 0 jgl NA

, l ggl Surveillance Test l  !

',Envirv co'2ro.r " ** ** ** **

acts.se suouNro, cnvirv @ l l NA tocar,en o, . ts,,, @

R Q @o ce avuisel Z igl NA l

' ' ' '* " a

....so~~ ..esa .i a

~uo. . r .. e sc.i,rie.@

8101 O! Ol@LZ_J@l ' "

NA I

, .se~~.'t i~,u'2 s =

~uo... o.sc,,noN@

fit'l 101 Oi ol@lNA

,, n l

'rN's * * *s*c"'lro'., '" #* @

i l Zl@l NA l

' 'issuto usu$rv 8205110546 820503 ea casca ,rica' PDR ADOCK 05000331 NAC USE oNLY ,

.I 6 l llllllllll lll5 f SAvee,,,,,,,g, Kimuel L.11111 ,uoy g; 319-851-5611

{ ,