ML20042A754

LER 82-006/03L-0:on 820210,ATWS Div II High Pressure Transmitter 2-263-20D,read Offscale High & Tripped Light on Panel 2202-70B.Caused by Faulty Capacitor in Amplifier Circuit Board.Amplifier Circuit Board Replaced

ML20042A754
Person / Time
Site:	Dresden
Issue date:	03/08/1982
From:	Kim D COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20042A748	List: ML20042A747 ML20042A754
References
LER-82-006-03L-01, LER-82-6-3L-1, NUDOCS 8203230741
Download: ML20042A754 (2)

Text

. .

LICENSEE EVENT REPORT C:!NTMOL BLOCK: l l l l l l (pLgAgg PRINT OR TYPE ALL I:EQUIRED INFO 7.MATION)

, e lo l t8l 9l Il L UCENSEE 7

l D lRCCOE lS l2 l@l 14 0 l 0 l - l 0 l0-15 l0 l 0 l 0 l - l 0 l 0 25l@l 264 l 1l uCENSE NUMSER 1 l 1 l 1 l@l 57 CAT UCENSE TYPE JO l

58 l@

CON'T lol1I 7 8 NuRCE l L gl 0l 5 l 0 l 0 l 0 l 2 l 3 l7 gl 0 l 2 l 1 l 0 l 8 l2 @l 0 l 3 l 0 l 8 ) 8 l 2 l@

60 61 CoCXET NUMBER 68 69 EVENT DATE 74 7~ REPCRT DATE do

' EVENT DESCRIPTION AND PRQ8 ASLE CONSECUENCES h I o 12 I l During normal operation, ATWS Division II high pressure transmitter 2-263-20D was found l g reading offscale high and tripped light on panel 2202-70B which was illuminated. The l

,,,,,g effect on public health and safety was minimal since transmitter 2-263-20D failed in  ;

, ,,, tripped condition. Also, if an actual reactor high pressure had existed, the 2-263-20B g transmitter would have tripped both Recirc Pump M.G. sets as designed. This is first ,

occurrence of this type on the ATWS system.

10 6 a 1 l I 7 ea 80 SoTE TC$E su$ciEE CouroNENT CODE Sue CO'E $ 3E 10191 7 8 lI l A lh W h d h lIlNlSlT lR l Ulh dh dh 9 10 11 12 13 13 19 20

,,. SEQUENTIAL OCCURRENCE REPORT REviS40N LER EVENT YEAR REPORT No. CCCE TYPE No.

@yug/Roat 18l2l

,, 21 l_l l 010l 6 l l-l 10l31 lt l l-l l0l 22 23 24 28 27 25 29 3J 31 32 N Ac 0 P T M HOUms 22 #5essTT[ PcYMUs.

s Nt MANur RER l33A gl34 Blg l5Z 2

[g l34Zl@ 37 l0l0l0l l 40 l Nlg el l42 N lg [N]g 4;,

l Rl 3 l 6 l 9 [g 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTICNS Iilol l The cause was attributed to a faulty capacitor in the amplifier circuit board (Rosemount (

,,,,,[1153). The bad amolifier circuit board was replaced. Pressure switch was calibrated l

,, , y and satisfactorily tested. The bad circuit board was sent back to manufacturer for re- ,

, , ; pair. Additionally, surveillance DIS 260-4 will be performed on these instruments l

,, ,,,; monthly. ,

7 4 3 80

1. 'SE sT  % power oTutRsTATus h $iEcSRv' oiscovERv oEsCRiPTioN @

N/A Operator Observation lt I 5* l l E l@ l0 l9 l7'*l@l" l lAl@l

• • 8 l

AcTiviTv ColTENT

s. ELE 4sto or RELEASE LocATtoN O.P RELEASE @

l1 l 68 l9l Z l @ 10l Zl@l 7 11 AMouNTOF ACTIVITY N/A 44 l

46

@ N/A l l 80 PERSCNNEL EXPC5uRES NUMGER l 1 l '7'l l 0 l 0 l 0 lhl ZlTYPE @lCESCRIPTfoN N/A l PERSONNEL iNau'dits NuueER l j a l l 0 ] 0 l 0 l@loE$cRIPTION@ N/A l 7 8 9 11 12 30 LOSS 08 OR oAMAGE To PActuTV

?Y DESCRIPT10N N/A I i 191 7 8 3 l 1'Elhl 10 60 l

^

8203230741 820308 NRC USE CNLY ,

12 l a l h gDR ADOCK 05000 l llll lllg;;;;l}

7 8 9 .v 68 69 30. ;

NAME OF PREPARER PHONE: 815-042-2090 v-480 i

m

- 1 DEVIATION REPORT 4

v;_ / 7Commonwealth Edison OvR NO. 12 - 2- 82 11

,( ,,/ STA unit YEAR NO.

PART 1l TITLE OF DEVI ATION OCCURRED 2-10-82 0005 Pressure Switch on ATWS Division II Failed High cory ,. m SYSTEM AFFECTED 260 PLANT STATUS AT TIME OF EVENT TESTING Vessel Run 2460 812 O O yogg PantMnT) ' to,ggy,g, instrumonention

• DESCRIPTION OF EVENT YES No Q

Equipment Operator discovered that the "D" pressure switch in ATWS Division II was reading offscale high. No trouble alarm was annunciated in the control room. The tripped light on panel 2202-70B, Aux. Electric Room, was illuminated.

Instrument Mechanics were called in to resolve problem.

to CFR50.72 NRC RED PHONE @

NOTIFICATION MADE YES NO CWIPMENT FAILURE D18658 YES NO WORK REQUEST NO. RESPONSIBLE SUPERVISOR W. Pietryga oATt 2-10-82 m

PART 2 l 0PERATING ENGINEER'S COWENTS The system was returned to operating .itus following the replacement of a faulty amplifier circuit board.

O EVENT OF PUBLIC I N TER E S T 24a HOUR NRC NOTI FI CATI ON RE0'D TECH. SPEC. VIOLATION TELEPH T. Tongue (courtesy) 2-10-82 0830 REGION lil DATE TIME NON REPORTABLE OCCURRENCE TELECM/TELECOPY 14 OAY R E P O R TA BL E / T. S . REGION lli DATE TIME

@ 30 DAY REPORTABLE / 7.S.6.6. B. 2.b ,

ANNUAL /SPECL REPORT RE0'O IF ABOVE NOTIFICATION IS PER 10CFR21 A.I.R. e

$. DAY WRI TTEN REPORT REQ'D PER tOCFR2t L.E.R. ,82-06/03L-0 TELEPH . . a er bOM MN CEro CORPORATE OFFICER DATE TIME PRELIMINARY REPORT COMPLETED AND REVIEAED John M. Almer 2-10-82 OPERATINC, E % INEER // OATE /

INVESTIGATED REPORT & RESOLUTION *.

\ ACCEOTED BY STATION REVIER > %, i Mvvw) .

[

f/w - > >

1 3/911 1- .

, , I slN NY RESOLUTION APPROVED AND AUTHOR I ZED FOR DI STR IBUTION -

'@ b e .. u 's m eu is.sa.ii io.ei (,)

q g I