ML20009A868

LER 81-037/03L-0:on 810607 During Normal Operation,Vacuum Breaker 2-1632-D Position Indication Was Lost During Testing.Cause Unknown.Breaker Retested W/O Problem

ML20009A868
Person / Time
Site:	Dresden
Issue date:	07/02/1981
From:	Holland P COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20009A865	List: ML20009A864 ML20009A868
References
LER-81-037-03L, LER-81-37-3L, NUDOCS 8107140381
Download: ML20009A868 (2)

Text

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NRC FEM 366 -- -

- - ' - - - - -- - - - - - - - - - - - - - - - -- - - - - - U.S. NUCLEAR REGULATORY COMMISSION (7-77) ' *

, L.lCENSEE EVENT REPORT

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CONTROL BLOCK: l 1

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lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) l7 o l 18 9l l I l L l D l R l S l 142 l@l UCENSEE CCOE 15 0 l 0 l -i 0 lUCENSE 0 l 0NUM3ER l 0 l 0 l - l 0 l 025l@l264 l 1UCENSE l 1 l 1TYPE l l 1Jol@l 57 CAT l@

68 CON'T l0l11

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7 8 5cu c l60L @l0 61 l 5l OJ 0l 0l 213 l 768@l690 l 6EVENT DOCKET NUMBER l 01718 DATE l1 l@[75 0l 7l 74 0l 218 l 180l@

REPORT CATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h I o i 21 l Durine normal Soeration with Suopression Chamber to Drvwell Vacuum Breaker I l o 131 l Operability Test DOS 1600-9 in progress, vacuum breaker 2-1632-D position indication - l

. lo1Al l was lost. The vacuum breaker was immediately verified to be closed. This was of [

l o I s i I minimal safety significance since only the indication was lost and the vacuum breaker l.

Io (s l l operated properly. There was no effect on public health or safety. l l 0 17 l -l I Io tal I l 7 8 9 80

. OE CE SL C E COMPONENT CODE SU8 Code S E lo l 9 l' l S l A l@ l El@ l E l@ l Il Nl S l T l R lU l@ l S l@ 20lZ l@

7 8 9 10 11 12 13 18 19

,,,, SEQUENTIAL OCCURRENCE REPORT REVISION LE R/ R0 EVENT YEAR REPORT No. COCE TYPE No.

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,,21 22 23 24 26 27 28 29 30 31 32 N AC 0 0 P 7 ME MOURS S8 1 PCR 8. SU 1 MA UFA RER ..

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 l1 Io l l The vacuum breaker was retested several times and the problem did not reoccur. l litil l Therefore, the exact cause could not be determined. DOS 1600-9 will continue to be I i, i 2 I l performed monthly to verify vacuum breaker operability. l j 11 131 l l 11 141 l l 7 8 9 80

% PCWER OTHE R STATUS dis O Y DISCOVERY CESCRIPTION l1158 l l E l@ 10l 0l 4l 5l@l 7 12 11 NA 44 l l46B lhl 46Routine Surveillance 80 l

CELEASED CP RELEASE AMOUNT OF ACTIVITY LOCATION CF RELEASE R l Zl @ d@l 7 8 9 to 11 NA 44 l l 46 NA 80 l

PERSONNEL EXPOSURES NUM8ER TYPE

• l l 1 l'71 l 0 l 0 l 0 lhl Z "lhlDESCRtPTION NA l l' '

PERSeNNEL iN2u' RIES NUM8ER 2 "

DESCRIPTION @

p li la l l 0l G ld@l NA l l 7 8 9 11 12 80 LCSS OP c4 0*vAGE TO FACluTY TYPE KESC G .'ON l 1 l 899l l Zl@L NA l._

l7 10 80 Pu8uc:TY fm e107140381 810702 NRC USE ONLY

• IS$uEe PDR ADOCK 05000237 ,

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, 7 8 9 to 68 69 30 5 ut.uc ne oncoamco P. Holland , ,,,

(815) 942-2920, Ext. 4620 l

6() z7 DEVIATION REPORT

. DV R NO.

Commonwealth Edison STA UNIT YEAR N O.

e 2 61 PART 11 TI TLE OF CEVI ATION CCCU RRED Loss of One Vacuum Breaker Indication

. . 6-7-81 13:45 DATE TIMt SY5 TEM AFFECTED 1600 PLANT CONDITIONS TESTING Primary Containment MODE Run p w n ,9wr3 1143 , LOAD (MWE) 318 W

YES NO DESCRIPTION OF EVENT During Suppression Chamber to Drywell Vacuum Breaker Opera'ility o Test, DOS 1600-9, vacuum breaker 2-1632-D right limit switch failed to cause Alarm 902-4-G-14 or cause the 1 :al light to go out.

DESCRIPTION OF CAUSE Bad switch.

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DTH'ER APPLICABLE INFORMATICN Left side switch works.

EQUIPMENT X YES CR NO. WR NO.

FAILU RE O NO -

D14091 955?ONSIBLE SUPEevlSOR DATE PART 2 l OPERATING ENGINEERS CCYMENTS Drvwell vacuum breaker was physically verified to be closed immediately.

SAFETY-TYPE OF CEVIATION EVENT OF POTENTIAL TECH SPEC NON-REPORTABLE ANNUAL RELATED REPORTABLE 0] URRENCE PUBLIC INTEREST VIOLATION OCCURRENCE REPORTING AR ISSUED 10CFR21 YES X YES X 14 CAY _ _ _

I Fl 1CN NO lXl30 CAY y ,

_ NO REPORTABLE CCCURRENCE ACTION ITEM NO. PROMPT ON-SITE NOTIFICATION D. J. Scott 6-8-81 08 00 TITLE CATE TIME TITLE CATE TIME 24-HOUR NRC NOTIFICATION PRCMPT C ?-SITE NOTIFICATION TPH Mike Jordan 6-8-81 09.D0 F. A. 5almer 6-8-81 12:50 PEGION lli CATE TIME TITLE DATE TIME TGM +

REGION lli 4 COL CATE TIME TITLE CATE TlVE RESPONSI ELE COvP ANY f F I P.ER INFOPYED OF IOCFR21 CON 0!TiONS AND TWEIR DEPO RT TO N PC

• TITLE DATE TiVt R EVI EW AND CGMPLETED J. W. Wuiciga 6-8-81 CPERATING ENGINEtR DATE

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ACCEPTANCE BY STATION REVIEW g~ g b/MC 4 AS RECulREC *" *"w CATE 7~2"U '

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AUTHORIZED FOR DISTRIBUTION STATION SUEER I N TEMEN T CATE S$e5f7' f0 77 (F0eu t5-!?-el i