05000265/LER-1981-002-03, /03L-0:on 810116,pressure Controller for Electromatic Relief Valve 2-203-3B Tripped in Excess of Tech Specs Limit.Caused by Instrument Drift,Possibly Contributed to by Faulty Microswitch.Switch Replaced

/03L-0:on 810116,pressure Controller for Electromatic Relief Valve 2-203-3B Tripped in Excess of Tech Specs Limit.Caused by Instrument Drift,Possibly Contributed to by Faulty Microswitch.Switch Replaced

ML19339C878
Person / Time
Site:	Quad Cities
Issue date:	02/03/1981
From:	Wykoff D COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19339C876	List: 05000265/LER-1981-002, Forwards LER 81-002/03L-0 05000265/LER-1981-002-03, /03L-0:on 810116,pressure Controller for Electromatic Relief Valve 2-203-3B Tripped in Excess of Tech Specs Limit.Caused by Instrument Drift,Possibly Contributed to by Faulty Microswitch.Switch Replaced
References
LER-81-002-03L-03, LER-81-2-3L-3, NUDOCS 8102120188
Download: ML19339C878 (1)

LER-1981-002, /03L-0:on 810116,pressure Controller for Electromatic Relief Valve 2-203-3B Tripped in Excess of Tech Specs Limit.Caused by Instrument Drift,Possibly Contributed to by Faulty Microswitch.Switch Replaced

Event date:
Report date:
2651981002R03 - NRC Website

text

......u,.,om...........

emt, n.mr.. n (7 77)

LICENSEE EVENT REPORT CONTROL BLOCC l l

l l

l l

IQ (PLEASE PRINT oR ?YPE ALL REQUIREO INFoRMAVioM l o l ' l l I l L l Q l A l D l 2 !@l 0 ! 0 l 0 l - I O l 0 l 0 I - ! 0 l 0 l 0 l@l k I I l1 l1 Il l@l l

l@

7 5 ?

UCENSEE CCCE I4

S UCE'.5E %Y6Ed

.S M

LICENSE TYPE JJ SI LATts l0ltl

,'j l L Q) 01510 l 0 I o 12 l 615 @l 0 l 1 l 1 16l811_,,1@l0121of3I 81 11 @

CC?.'T 60 61 OOC % ET NU"5E Ea M

O iv E'.T C ATE 74

S RE*OR T D ATE dJ 3

EVENT OESCRIPT!ON A'io PROB ABLE CONSELE'.CES h the cressure controller for I

[TT-j l While performing routine surveillance test QlS 40-1, l a i a l ! electromatic relief valve 2-203-38 was found to trip at 1181 PSI.

This is in excess l

lo ja j j of the 1130 PSI limit set by Technical Specification 4.6.E.

All other electromatic l

the required pressure had the need arisen and l

[-l g ; relief valves would have opened at d remotely from the Control

,c j Lelectromatic relief valve 2-203-3B could have been opene I

r

,q,7l; Room.

• It !I 30 C OYP.

VALkE 4

55 AV

CAUSE

Ca.

C;;E COOE Susu;;i CC

ME SUSCODE SUSCOCE [3}gl lC l Cl@ l E l@ lE l@ l 1l Nj S; Tl R] U j@ l S l@ lZ l@

i a

9

• 0 11 12 IJ 1d 13 20 T

• _ ENTI AL OCCUR A ENCE REPCRT GEVIS'ON i

• E4A d E30a7 NO.

CODE TYPE NO.

h g;gg og 1811I l-l 10 !0 12 I l.g!

10131 I tl 1-1 101 '

.g;

,,, 21

.2 OJ 24 J6 2'

!8 29 JG J3 R

AT AC=YENT

\\p AD 4 PRIVE COV8 COVPO'.ENT ACTICN EUTunE EA8ECT Sr+uTOCwN TAAEN ACTION CNFLANT YE'H O C dOUAS

,,2 3f. d "i T T E D FOAtt w9.

SU PPU E M YANLFACTUmEA l E lgl34Xl@

lZl@

l Z l@

l0 l0 l0 l l

l Hj@

]Yl@

l X l@

l D j 2 l 4 l 3 l{

sJ 3s 36 3<

43 41 42

. 43 44 47 CAusE CESCRIPTION AND CCRRECTIVE ACTIONS h drift. The cressure controller was

[

jijajl The cause of this occurrence is instrument inrediately recalibrated and tested satisfactorily. A faulty microswitch within I

j, j,j i The micro-l j the controller was suspected to contribute to the instrument drift.

g,,7; l switch was replaced on 1-31-81 and the instrument was tested satisfactorily.

l g,,3; The pressure controller is Model 1539Vx.

i g,,,gg 90 3 3 ST S

SPOWEA OTHER STATLS DS AY DISCOV ERY DESCRIPTION NA l

lB lhl Surveillance Testina l

I' l51 l Elh l 0 l 9 l 6 l@l

^

LOCATicN cp nELE4SE h AvounT OF ACTiviiv h l ACT!vtTy CO N T E'.T.

l AEtE AsEs OP petE ASe NA l

NA

'60 l1 l6 l d h W@l 44 45 7

3 3 10 is

1. ERSONNEL EAPOSLAES

( 7 l l 0l 0 l 0lhlTYPEZ lhl ESCRIPT]CN l

NU?.18 E A C

=

NA l1 80 7

8 9 11 12 13 PERSOPaNE L IN;UniE!,

hhh@ /h n o n,, _._ _

l

?f;Y9 OE 5CR18 TICN I1 l'--ll0l0\\A 0j@l NA J

055 08 CR D 9 ace O F ACluTV 43 L

h l

TYPE O E SC pe pit ON it191.lZl@l NA 7

4 p q

NRC USE ONLY PUEUCt Ty l.'l'l.L1.!J81 NA

- l

_l l l l l-l l i l i I ' l l inuto otsCAiPT c?4 ca 69 a.;

309-654-224hiext. 180

?

51df120'f%$

Dale L Wykoff

- PHONE:

NA*aE CF PPEPARER _