ML20040A444

LER 81-077/03L-0:on 811216,ATWS Div 2 B & D Pressure Switches Found to Be Valved Out of Svc.Caused by Instrument Mechanic Valving Error.Switches Valved Back Into Svc & Individual Cautioned

ML20040A444
Person / Time
Site:	Dresden
Issue date:	01/15/1982
From:	Morgan W COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20040A442	List: ML20040A441 ML20040A444
References
LER-81-077-03L, LER-81-77-3L, NUDOCS 8201210104
Download: ML20040A444 (2)

Text

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LICENSEE EVENT REPORT CONTROL eLOC.t l i

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7 6 3 LICENSEE CODE 14 15 UCENSE NuMer.M 25 LiGENSE TYPE J0 CON'T lolil ,"gE'0"y l L @l0 l 5 l0 l0 l0 l2l3l7 g[1l2l1 [6 l8 l1 l@l0l1l1l5l8l2l@

EVENT DESCR TION At O PROB A E C t SE ENCES Ml Diirinc normal operations. ATWS Division TT " it " nna "n" p-a m -n c. . < c h e . m ,. m cm , , .,1 , I 1 o l 31 l be valved out of service. Safety implication was minimi becausa *he n n -, ' 5fah l I o 14 I l pressure reactor scram switches were operational and ATWS Division T vas onernbla- I lo f sl l There was no effect on public health or safety. Previous similar occurrence: I Io le ] l 81-073/03L-0, Docket 50-249. l 10171I I l o f ti i 80 l

7 8 3 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SU8 CODE COMPON ENT CODE SUSCODE SUSCODE l0l9l 7 8 9 l 1l A[Q ]@ lC l@ l Il Nl S l T l R lU l@ l Sl@ l Zl@

10 11 12 13 18 19 20

,,,, SEOGENTtAL OCCURRENCE REPORT REVISION LER EVENT YE AR R EPORT NO. CODE TYPE No.

@ sg/ROa 18 I t I l-l I o l 71 71 l/l In I, I ILI l-l 101

_ 21 22 23 24 26 27 28 29 30 31 32 N AC 0 ONP NT ME HOURS S8 i POR 8. SUP L E VANUPAC RER Ial@lcl@

3J 34 17.l@

35 Iz 36 l@ l 01 o lo 10 l 37 40 INih W h d h IRI1161olh el 42 43 44 47 CAUSE CESCRIPTiON AND CORRECTIVE ACTIONS lt l o l l The cause was attributed to valving errors by an Instrument Mechanic. The i-mied ia t e l l 11l l action was to valve back into service the affected instrumentation. Additionallv. a I g station walkdOwn verifying otoper safety related instrumentation valve position was I g performed. This event was discussed with the specific individual involved and an in- l

,,,,,; strument backfill procedure was written to prevent recurrence. l 7 a 9 80 ST  % POWER OTHER STATUS ISCO RY DISCOVERY OESCRIPTION I2 I s I (L,j@ l 0 l 7 I o l@l N/A I L.aj@l o,erator obs - ,e4nn l

' ' '2 n a 4 4 80 A!nviTY CO'2 TENT EELEASE AMOUNT OP ACTIVm LOCATION OF RELEASE @

l i i s8 9I l Zl @D OP N/A RELEASELz_JOI I I N/A I 7 10 ft 44 45 80 PERSONNEL EXPOSURES NUM8ER TYPE DESCRIPTION li j i j l0 l0 l0 l@l Z l@l N/A l PERSO~~EL i~;u'J ES

~uM8ER oESCR,PTiO~ @

l: la 8l 9l0 l0 l0 l@l N/A l 7 11 12 80 LOSS OF OR DAMAGE TO PACILITY TYPE DESCRIPTION lt l 9 8l 9l Z l@lto N/A l 7 80 PUBLICITY NRC USE ONLY ISSU E D DESCRIPTION

• 12101 l N l@( v/s  ! III!lIIIlllll1 7 g 9 to 68 69 80 3 0, X 422 N AME OF PREPARER PHONE: _{

8201210 tot '

N DEVIATION REPORT

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vz ') Commonwe:lth Edisonova NO.

S.A 3

- 2 UNIT

~ YEAR 81 '137 No.

PART l TittE Or oEviATiON OCCuaRED ATWS Pressure Switches B And D Found Isolated 12-16-81 0700 OATE tivt Y S TEM AFFECTED 260 etANT STATUS At flME OF EVENT TESTING Run 2006 649 I UM*ntathn uoDE , p,ncy,73 , ,g,g,y,g,

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cEsCRIPTION OF EVENT Review of equip nent operators round buok revealed that ATWS Division II B and D pressures were reading zero for 12-14-81 and 12-15-81. Investigation revealed that pressure switches were valved out and isolated. I.M.'s were contacted and at 1043 hours0.0121 days <br />0.29 hours <br />0.00172 weeks <br />3.968615e-4 months <br />, pressure switches were valved back in. Div. I pressures:"A" at 980 psig, Div. II pressures:"B" at 1020 psig, "D" at 980 psig (after return to service).

10 CrR50.72 NRC RED PHONE O O NOTIFICATION MADE YES NO EQUI PMEN T F A ILURE WA rCs O s0 acRn RrouCST NO. RESPONSIBLE SUPERV8SOR Bob Herbert OArt 12-16-81 P ART 2 l 0eERATiNo ENGINEER'S COMMENTS Div. I ATWS remained operable. Additional safety related instrumentation valving will be checked to assure proper valve positio.' per an SOP.

O EVENT OF Pb8LIC INTEREST l 24-HOUR NRC NOTIFICATION REQ'O O TECN. SPEC. vi0tATiON TELEPH Tom Toncue (courtesy) 12-16-81 1130 REGION til DATE TIME NON REPOR TABLE OCCURRENCE TELECM/TELECOPY O ' A DAv aEPoaTABLE'T.S. aEoioN lii DATE TIME

@ 30 DAY REPORTA BLE / T. S.6. 6. B . 2. C ANNU AL/SPLCL REPORT REC'O IF ABOVE NOT s FIC ATION IS PER 10CFR21 A.I.R. *

[ 5-DAY WRI TTEN REPORT REQ'O PER 10CFR2 L . E . R. . 81-77/01L-0 cpg F. A. Palmer 12-18-81 0844 CECO CORPORATE OFFICER DATE TIME i

PRELIMINARY REPORT CCNPLETED AND REVIEWED John W. Wujciga 12"1b"O1 CPERATING ENGINEER , OATE s i

INVESTIGATED REPORT a RESOLUTION ACCEPTED BY STATION REVIEW '

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RE SOL U T I ON APPROVED ANO  !

AUTHORi2ED FOR DI STRi BUTION //

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