ML20086U149

Applicant Exhibit A-78,consisting of Note Re Lube Oil High Temp Switch DG1B

ML20086U149
Person / Time
Site:	Vogtle
Issue date:	06/01/1995
From:	GEORGIA POWER CO.
To:
References
OLA-3-A-078, OLA-3-A-78, NUDOCS 9508030289
Download: ML20086U149 (4)

Text

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(zffjS-00'3 b/Yffs hW DOCK USNRC 1TSH19153 LUBE OIL HIGH TEMPERATURE SWITCHL 14 A10 :23 O Prior calibration was performed on 3/14/90. At noin i was found out of tolerance with an as found of 300 *F to trip?a t was calibrated and returned to service with a < rip of 199 F. It was removed from service on 3/23/90 as the suspectes cause.o tri I

switch calibration was checked and would not calibrate within tolerance. p.

It was The l placed in storage on 3/23/90.

SWITCH TWO This switch was placed in service on 3/23/90 with a trip of 203.4 *F and a reset of 198.0 *F. On 3/27/90 it was removed from service and it's calibration l checiecL. As found was 203.5 *F to trip ar,d 199.5 c egreei to However found to be venting continuously anc stasequenty rep a .. e o d swit,e?t s was was placed in storage on 3/27/90.

ITHS19146 LUBE OIL HIGH TEMPERATURE SWITCH DG1A l Prior calibration was performed on 3/3/90. At that time it found out of tolerance with a trip point of 211.0 *F and a reset of 203.1 *F switch was calibrated and returned to service with a trip point of 200.2 *F an a reset of 193 degrees On 3/30/90 the switch was moved for calibration and found out of tolerance with .4 *F a a reset of 188.0 *F. The switch operated O cluasn,a shly. It was and'a reset oftrip point ce of

. wi1 a new switch calibratec to trip poin 201.27 *F 196.2 *F. The new switch was returnec, to service, oririnal-switch is in storage.

ITSH19117 JACKET WATER HEATER OUT HIGH TEMPERATURE SWITCH DGIB Prior calibration on 3/14/90 was within tolerance with a trip point pf 201 *F and a reset of 193 *F.

On 3/26/90 switch was found out of tolerance with a Mo reset of 182.4. Further i1vestination determinec. a small leal. point A newof 190,.6 switchand asoa-failed leak test. A thirt swite'h calibrated correcty with a 1 rip noint of 200.67 ciegrees and a reset of 196.93 *F and was returned to service. "he old switches are '

in storage.

l ITSH19119 JACKET HEATER OUT HIGH TEMPERATURE SWITCH DG1B Prior calibration on 3/14/90 was within tolerance with a trip point of 200 *F cnd a reset of 194 'F. .

1 On 3/26/90 the switch was found out of tolerance with a trin noint of188.2 *F cnd a reset of 180.6 *F. Further investigation determined a small Teak. A new switch was ino >erable due to a missing gasket. A third switch was cah~brated with I

p trip point of : 98.57 and a reset 191.90 and returned to service. Old switc 2es are i Qsnstorage.

9508030289 950601 PDR 92 PRCCECT ADOCK 05000424 0o6218 C PDR

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.O TEl@ERATURE SWrrCHES j l

bGH TEMPERATURE SWITCH IB '

n 490.  !

~ in=1 calibrat)a Removed agplaced as N cah$ ratio within tolerance. n was d not i SWITCH 2 l Switch was removed n by MWO W 1 for calibrat'en cback. It was to tia= was .

lacet. Tss switch m +ia bi on  !

e trip and. reset anoes M sa rv mt not

,ly close upon reset? Pa m storage 3/27/90. ,

1TSF:19146 l

, 3 OIL HIGH TEMPERATURE SWITCH i 1A nin=1 calibration 3/1040. Trin point was ,

/E on . - Swi d was rep 1lM)0 was places,feh appeared ain storage on !

has not : men - -- _ _ agam.

SH191:,7

< urr WATER HEATER OUT HIGH TEMPERATURE

3 BM%,ati n .

at Tocation of ene,ne. us to aha++-g.

t< sting. gp 3/[16/90. wi 1 paoMf m. Switcli was on . . ,mwn 1 , testse  ;

to operate satsfactory vend.or was So W%wi= l d

Re"d*fe"#.hs!'n in storage on 3/27/90.

tn "L' Ten 1L*eL%"cet ,

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92 PftOJECT i 0o6219 i

O 77bER ria=1 cali HEADER don 3/,14/90.

OUT MGHTEMPERATURE g attempt w h 8T % yb* M E"*-

on3%&

, in s<;orage at that time. switch tw L

venc or .nd found to be sa ry on returned to storage.

Mg MAIN HEADER OUT HIGH

] 1A nb1683 o n retestec..

M and LT f MAIN HEADER OUT HIGH

]

i . I was re 9E1863 acec, m storage on 3/31/90. p a O

TEST FOR CAILO TURE SWIICHES 4"ar**r#M,of=m229**mr.M42gi%

e o J B L " "ti .r

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• r "' Je H in tempe

$fN" b *

. We wiI -

ture$mth ak reset. U.

switches E*o not co we e p g g en_ g swi to .ttemp,t to root c.use -

l 4

92 PftOJECT 006220 i

PRESSURE SWITCHES IPSL4903 3 gRMALTRIP [- 3j PdMee&=bcedin and then was p storage on3/2"aM'.**nsor 1*m- "tr*%

1PS4749A PRESSURE LUBE OIL 1A ririsul calibration 10/2 . was romove l and7 cheeked on 3/3 19001 . Swites won (d not reset, was repla , an . in storage.

/

P1 SSURE LUBE OIL k' Original ca' ibgon 1 3/3040 gr was E$ecEeYsa*thactobut rep an b storage Y SSURE LUBE OIL o Dati P1 Original calibration 10/21/88. See 1PS4749B. .

h N IC BOARD -

Nhile working MWO 19001 coald uced noor tri Tse who'Liete*ctive , repbw*l roun e in storage on .

PROPOSED CAIf0N PRESSURE SWITCH TEST so To'.h"8T2 checu o"

va ve switch

. a!*Yi

. seat eroa

• h "*, 'Elll" amam to.

, inspect t se se swite s,

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] p we a normal cal ration nrococ ure to tut ft$ trip point '

overall rue. If spoad .,

C notswi re,tch to  !

correctly attempf %we iden t se root cause = - an. l LOGIC BOARD TESTING  !

DG1B '

No further testing of the DG1B logic is planned at this time.

92 ""*3ect 006321

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