ML20115F708

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Part 21 Rept Re Failures of Abb/Ite 27N Relays.Abb Has Not Established Root Cause for What Appears to Be Repetitive Failure of U5 Timer
ML20115F708
Person / Time
Site: Summer South Carolina Electric & Gas Company icon.png
Issue date: 07/15/1996
From: Zaccone M
SOUTH CAROLINA ELECTRIC & GAS CO.
To: Stransky B
NRC
References
REF-PT21-96 NUDOCS 9607180070
Download: ML20115F708 (3)
v • d • e


Text

l

  • r POWER REACTOR EVENT NUMBER: 30752 i

FACILITY: SUMMER REGION: 2 NOTIFICATION DATE: 07/15/96 UNIT: [1] [] [] STATE: SC NOTIFICATION TIME: 16:15 [ET]

RX TYPE: [1] W-3-LP EVENT DATE: 05/17/96 EVENT TIME: 00 : 00 [EDT]

NRC NOTIFIED BY: ZACCONE LAST UPDATE DATE: 07/15/96 HQ OPS OFFICER: BOB STRANSKY  ;

NOTIFICATIONS )

EMERGENCY CLASS: NOT APPLICABLE 10 CFR SECTION:

CDEF 21.21(b) (2) DEFECTS / NONCOMPLIANCE V. HODGE NRR UNIT SCRAM CODE RX CRIT INIT PWR INIT RX MODE CURR PWR CURR RX MODE 1 N N 0 HOT SHUTDOWN O HOT SHUTDOWN I

l EVENT TEXT 10 CFR PART 21 REPORT REGARDING FAILURES OF ABB/ITE 27N RELAYS.

THE FOLLOWING IS TEXT OF A FACSIMILE SUBMITTED BY THE LICENSEE:

"NONCONFORMANCE NOTICE 5472 REPORTS THE THIRD FAILURE OF ABB/ITE 27N RELAYS l AT V.C. SUMMER NUCLEAR STATION WITHIN A THREE YEAR PERIOD. IN EACH CASE, l THE TIMER INTEGRATED CIRCUIT US WAS DETERMINED TO BE DEFECTIVE. IN ALL I CASES, V.C. SUMMER NUCLEAR STATION ENSURED THAT THE ASSOCIATED APPLICATIONS WERE RESTORED TO OPERABLE STATUS UPON IDENTIFICATION, REPLACEMENNT AND TESTING OF THE RESPECTIVE 27N RELAYS, ABB HAS NOT ESTABLISHED A ROOT CAUSE FOR WHAT APPEARS TO BE A REPETITIVE FAILURE OF THE US TIMER. THIS REPORT IS i BEING MADE PURSUANT TO 10 CFR PART 21." I i 0 i THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED BY THE LICENSEE.

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9607180070 PDR 960715 6 ADOCK 05000395 1 PDR j i

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. . . _~_ _ _ ~ __ ___ __

07/15/96 15:53 'O'803 345 4356 SCE&G/NL/SG goog Po:t-it" brs.nd fax transmittal memo 7671 l

  • cf Pt915
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34/ g/4 5 /s / US.NucLLAR REGULATORY COMMisslON 88HC romu 361 EVENT ~ NOTIFICATION WORKSHEET NOTIFICATION TIME F ACILITY OR ORGAM:2ATION ,

UNIT CALLE R"5 NAME ggg g ,, m Vi ;j C. 5 - e SJ m 5$. pl;kAJ J. LCsoot - i so p .aik. ma

/(,, / f I st.L Sn..skv (v6 Last Offsme Camms AE55

.LVENT TIME & ZONE EVENT DATE (vil Pee AP a#

ASNU Tonic Gas ACHE

  1. u f 85/l*//hh tiHA) T5 Reeswass E/D ADEV (u51 tvil med Row ARAD

'OWER/ MODE BEFORE PowERduGDE AFTEh (4(81 T5 Devemen AN8N Oh (iil Dayesed Case.e on ADEG Ev4 Oth elemswees sans Op.

h[e eh [oh t=18A1 uewasivaes Coassima

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AUNA w,- T so C --Im GitC) Not L _ - by Ofi/EP3 ACNC lal Depaae Whele &/D ADA$

ANEA (iil RPE Actusten :_ _ _ ARPS GENIAAEC siail EarthqNake CENERAL EMERGDeCY ANFL (sil ESF Astusmen AESF EITE AREA EMERGENCY SIT /AAEC (illi Fases Numcane ANNU qiilhAl Sade $/D CaesttNtv AINA ALERT ALEJAAEC teid ANtC (is4(3) RNR Casse64 sty AtNS UedusWAL EVENT. UNU/AAEC liin lesfNeil Lspoensng ANLt (iiillC) Centent et Red Retage AINC 60.72 NON40SERGENCY mee men _ _ NI T_ _;_ ANTO fiiiHDI Asssemui ensispian ANeD P98Y54 CAL SECURtTY (73.711 DFI? (i.il ANOT twHAl Aer P - > IX Aess 8 AAIR T'L'aSaORY ATION NTRA si.4 Ota seennsi 7 ECCEthesmeensse ACE ACCE 4,vH$l ue pielenes > 2K Ase 8 ALIQ 30AG3 alATEmlAL/EX705URE B7FF tart AENE del Ofesite posises AanED OTHER NOAa4Je tCO.NSNLNINP.NLT1t.NOfeR avl tem E8dl AARC (w4 Ottsia Nautisenen APRE CDEF.FLOM E1RR.GCON qvl Las Emerg. _^

DESCRIPTION

' ) Non- C P&orms ee. }/oftea. P /') 2. rsjorts +ke +lard I'd/ ara of ABB/ITE t v.c. su.e, ar I%Iaw Ska;oe, willi >, a. 5 yev period.

27 N < slay,

. L. esd, eaa., +La. tua i,d Atd c.ic u;f ur w Jek,o,;oe) +o 1

be. de kc.tive . .6, o. l\ cases,y ,v.c. S w - Ldu- Staire. e .e s ar<)

! + L4.t +L. a.ssoct td Irc sv._ eesfom) +o yee.lle sfah tyn ida.,+ihu+ien , rybem.f.ws s.,+ ~ ) tes k y J 14e resp +1r i 2.7 N cdys . ,488 /ws na f e.s M h d e ) root cause. for abi l syv s +o be. o. re. Lilucr. .F ika. u S +1,,v.

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ryset is L: y ,,.Jep +;+;vepasuA -t 6 to cfg ta 21.

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lass.ase: Systems eftectes, senastions & their maasting egnses r ;m effect of evene en pient actiere ishen or planned. etc. '

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' NOTtPICATIONS YE$ NQ WILL BE - ANTTNfMG UNU$uAL OR NOT UNMSDI '

(fasfem eteett NftC RESIDENT [ "O STATitel DIO ALLSYSTEM5 FUNCTION ASREOutREDF YE5 (Esan'em aNuel LOCAL ADolteONAL en&U sieQOE OF OPER ATION

f. STIMATE FOR OTNER Gov AGENCIES ON SACKF UNTIL CDRRECTEO: [ RESTART DATE:

pggs Apatsg n_FLr Ast

. .ee,

,07/15/36 15:53 C803 345 4356 SCE&G/NL/SG 16002 1*-

(2 -/.

SAP-1165 i

Attachment 1 Revision 0 SUBSTANTtAL SAFETY HAZARD (SSH) EVALUATION TRACKING SHEET

""SeI**I

~' (TO BE COMPLETED WITHIN 60 DAYS OFINITIAL DISCOVERY)*

TRACKING SHEET INITIATION DATE 7 -J- jP4

(

  • 1. GENE RAL INFORM ATION Number #8//'/886 8 Discovery Date. .I"/ 78/ Date to Be Completed ^7'/5'-((

~

Reviewer fr>Aa,-/ Jf #A/f 2- 7/l/ ' h/dy F~a// ares Topic A 88/Z 7~f A/e A/ E-J# 7 2-How was topic firstidentified? -

List correspondence, documend, telecons applicable to the determination of the substantial safety hazard.

  • A/ &A/ Af8 bow f-#-

~/:3472- 2sont 32.9/

fSarW A'Mf 49 t/d V 720 A M R 4 % )~

  • 2. DISPOSITION Determined to be potential SSH, reportable per 10CFR21; YES NO Discussion / Justification:

Joe A/CA/ /ff 72. .

7"Aroe- rs /w h i/u rss af dere. to in fa-a s ra fe / e s'nu & Ltf r

6 Signatures: Reviewer / FA: 'M s e Date 7- Jir .//

Appropriate Furfctional Manager 44/M/d ~ Date 74 M Manager, Nuclor Licensing ' X #/4/fA-- 2_ Date 7/s-/(2

& Operating Experience (/ h

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3. Determined to be reportable per 10CFR21 by VPNO: (5 DAY LIMIT) 6 - rue (; 7 T~

VPNO Signature Date 7////M Time . s s s o

4. N RC IN FORM ED - SU BSTANTI AL S AFETY H AZAR _D 2 DAY NOTIFICATION Notified by SCE&G (Name) MI,,/ [ d,_<.,% NRC(Name) 8,4 kres/v Time //o /6~

~

Date 7//f/M /

Applicable Correspondence NCN S'/7 2. . A/c # 9 5 4 A/ c A) ~4/-f3 g

5. 30 DAY REPORT Due Date Date Letter to NRC Applicable Correspondence ,.
6. MISCELLANE005 INFORMATION ofr1 is AB B / ITY i
7. PROGRAM TRAC KING DOCUME NT. e.g., NCN, ONO, OPDR, MRF, CHPNR, SHPPR, etc.

8 CLOSEOUT Signature Date l Manager, Nuclear Licensing & Operating Experience l Closedin RT5: Signature Date Transmitted to Records Management Date t I

Signature NOTE: If review cannot be completed within 60 days of discovery date, an interim report must be submitted to the NRC within that same 60 day timeframe.

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