ML19337A252

LER 80-034/03L-0:on 800729,during Surveillance Test of Standby Gas Treatment Sys 1 (SGTS 1),overload Trip Was Experienced on SGTS Exhaust Fan 1-8.Probable Cause:Unusually High Ambient Temp Around Fan Motor Control Cubicle

ML19337A252
Person / Time
Site:	Oyster Creek
Issue date:	09/02/1980
From:	Ross D JERSEY CENTRAL POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19337A236	List: ML19337A234 ML19337A252
References
LER-80-034-03L, LER-80-34-3L, NUDOCS 8009090373
Download: ML19337A252 (3)

Text

.

4 w

3 U. S. NUCLEA3 CEGULATO2Y COMMIS$10N ,.

NAC FORM 366 ' .

47 771-LICENSEE EVENT REPO.

-

O'  ;

, G I (PLEASE PRINT C, lYPE ALL REQUIRED INFORMATION) $'

CONTROL SLCCK: !

i

} I l  !

lh 5

ill@

l J o &J 3i ) l N I J LICENSEE 000E l 0 l C t4 l  ?:S l 1 l@l 0 l 0 l- l 010 UCENSE NUM8ER l 010 l0 IS l--10 26 l 0

.ACENSE l@l *v'E Al Jo 1l57 11car 54 1l@l COWT 1 lolil se ig l L gl 0 l 5 l 0 l 0 l 0 l 2 l 1 l 589 )@l 69 017 l 2 'l91810 EVENT QATE 74

)@l019 75

{0 l2181080l@

REPORT D ATE - :

8 60 on DOCKET NUV8ER EVENT OESCRIPTTCN ANO PRC8ABLE CONSEQUENCES h i o ! 21_ l On July 29, 1980 during a routine surveillance test of the standbv gas 1 Io isl l treatment system #1 (SGTS #1), an overload trip was experienced on SGTS I l344; l exhaus e fan 1-8. Automatic circuitry started SGTS 12 which perfor: led I ioistl satisf acto rily. he safety significance of the event is considered I i;is ; l minimal since SGTS 42-vas available and oper'able if the need for its i jo;7i l operation had occurred. I I

10 i a l I SO 7 5 3 SYSTEW OAUSE OALSE COMP. valve 000E 000E SL9 CODE COMPCNENT 000E SLOC00E SL8 CODE loIal l S l C l@ y@ l zl@ l a l E j L l A l y l S 18- l@ l 3 l@ [z_,J @

19 .0 r 4 4 10 11 12 13 OCOURRENCE RE8CRT REVisrCN ,

SECUENTIAL EV ENT VE A R misoRT NC. CODE TYPE No.

@ ,"tE a. aC,5g 18 10 l 1-1  ! O I 3l 41 1/l 1013I IL I l-1 10I 2i 22 23 24 26 27 M 29 30 31 02 IPPECT - SpVTOCwN ATTACHMENT NP 4 0-4 'mVE COMP. COMPCNENT ACTICN suttat sCRM 368. SLP8U E R VANL F ACTL p E R TAKEN ACT:CN . ON ot.AN WETwCO aCbRS ** SU6MITTEC IAl@lxl@

.a 4

I: l@

25 -

L.;j@

a.

l 010I oI oI40 (2J@

si ai LvJ 42

@ L2J@

43 lcIoIaiol@

a 47 CAUSE CESCRIPT?CN AND CCRRECrtVE ACrIONS h It 13i } The accarent cause of the overlead trio was unusuntiv high

=~M e w e- ~. I lt it I I erature around the motor control cubiele for fan 1-8. h e nve- b d --n- 1 I,t2i i cective device was reolaced and SGTS 41 was tested satisfactortiv. An I ,

1 !s t i engineering investiration is in oretress to dete =ine what sters can he l l 141 l taken to avoid recuirence of tries due to hizh a ibient conditions . I f

• 80 5 9 s Acrit*v .* ' vtT)*CO 08

• 5?ATLS  % 80VvEn  ; ruga $74.gs d OiSCOVERY OISCOVEnv OEsCniPCN 37 I' t !I l 0! 3I 6I NA

=

l las3 @l* Surveillance Test l .

, .0 .

• Av,.y a.Est ': .

agggasE3 saggE23g aggyq7 ;p AC':VITY OCATICN 08 RELEASE .

It t3)12l l NA l l NA 50

• ERSONNE t ocsN ES

. NUM8Em *v8E O ESCR l **' C N i, m 10 i o 10 Gi 2 t@i Ni i IO "

- ' #En3CNNE.\N RiE5 Nbv3Em O E 50miPT'CN fITlIo!OIO!@l

, , , :2 NA l

.053 Os Om O AVACE O sacti.*v

• ssE Ofsemier oN .

I'I3! NA l s3 13 - .

30 ag g g;C;yv .

C USE CNLv SSL E OtsCo.eycN $ ,

I2 !Ol IT I 7eeklv Neve Re *;e a g e l Il l 3 [ll lll ll l@

.. t , .. ,, ,0. ; .

e NAVE CF **E8 ARE, Donald A. Ross , 201-455-3784

• • 090903 73 [

m . ~ . _ , . . . ~

.u m

.  ;

'A \

II

, (9 l

^

}

.7 .

r Jersey Central Power & Ught Company '

s.

,k 7 1 b.7 ff y' Madison Avenue at Punch Scwt Road Momstown, New Jersey 07960 (201)455-8200

.2 :

OYSTER CREEK NUCLEAR GENERATING STATION '.

Forked River, New Jersey 08731 ' ,,

1 Licensee Event Report Reportable Occurrence No. 50-219/80-34/ 3L Repor: Date September 2, 1980 ,

Occurrence Date July 29, 1980 ,

Identifi_ation of Occurrence Operation of the Standby Gas Treatment System in a degraded mode as allowed by Technical Specification, paragraph 3.5.B.3 when standby gas treatment system #1 was found :o be inoperable during a scheduled surveillance test. - .

31s event is considered to be a reportable occurrence in :he Technical Specifi-cations, paragraph 6.9.2.b.2.

Conditions Prior to Occurrence The plant was operating at steady state power.

Power: Reactor,1660 We Electrical, 542 W e Flow: Recirculation 13 x 10 3pm Feedwater, 6.00 x 10* lb/hr Pressure: 1020 psig Stack Gas Activity: 4.085 x 103 aci/sec Description of Occurrence On Tuesday, July 29,1980 at 2346 hourt, during a routine surveillance :est of

he s:andby gas :reatment system I (3GTS !), an overload trip was experienced 1 on SGTS exhaus: fan 1-8. Automatic circuitry started SGS 92 which perforned satis f acto rily.

Apparent Cause of Occurrence A subsequen investigation revealed that an overload trip on the "3" phase of E? l-3 had occurred. S e apparen: cause for the overload trip was an unusually high x2 bien: :*mperature around the noter control cubicle (106*y) .

Arssy Oscir31 0:wer 'a ~. Wt Ocf*:ary S 1 VG'"C9r Of Te 00rG'ai OuCuC ' tliI;GS 3fSt6m

r .

, .y~. . ,

_;# - .g

....pe ~p s., p J .

(

a lb

. s t

( 3 Reportable Occurrence No. 50-219'/80-34/3L Page 2- .tg

[- L September 2,~;i980 -

Analvsis of Occurrence

',2 l

Standby gas treatment system is 'used to process the reactor building atmosphere should conditions be' present which require its operation ~ Although SGTS ~ fl

. s--

p ,became~1noperable. SGTS 12 did' initiate and performed as designed.

^

The . safety ' significance of this event is considered minimmi since SGTS #2 was '

available and operable if the need for'its operation had occurred.

Corrective Action

'SGTS 11 (Fan 1-8) was. removed from service and the overload protective device- a replaced. An operability test was performed to prove the' system operable.

.y

' As part of the investigation of the overload trip, the =otor control center breakers for SGTS 11~ (I71-8) and SGTS , d2 (IF 1-9) and their related fusos.

. breakers and overloads were checked and found to be satisfactory.

-In addition,;the amperage of the motor was found to be in compliance with its design. The full load name place current rating is 12.8 amps. The full lead .

current was measured at 13.2 amps which is well within the 1.15 rated service s fac to r.

An Engineering investigation is in progress to determine what steps can be taken m to" avoid recurrence of trips due to high ambient conditions as experienced. ,  ;

-Failure Data .

General ~Ilectric -

.Model CR124-C028

-Mocor Overload Relay.

s j

. ,i 1

a =

i

' ~ " ' ' ' ' - ' ' _______-______._e.

_