ML20115F708

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
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)

Text

l

• r POWER REACTOR EVENT NUMBER:

30752 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 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 AT V.C.

SUMMER NUCLEAR STATION WITHIN A THREE YEAR PERIOD. IN EACH CASE, THE TIMER INTEGRATED CIRCUIT US WAS DETERMINED TO BE DEFECTIVE. IN ALL

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 0

i THE NRC RESIDENT INSPECTOR HAS BEEN INFORMED BY THE LICENSEE.

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9607180070 960715 PDR ADOCK 05000395 6

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07/15/96 15:53

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UNU/AAEC liin lesfNeil ANtC (is4(3) RNR Casse64 sty AtNS 60.72 NON40SERGENCY mee men _ _

NI Lspoensng ANLt (iiillC) Centent et Red Retage AINC ANTO fiiiHDI Asssemui ensispian ANeD P98Y54 CAL SECURtTY (73.711 DFI?

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AARC (w4 Ottsia Nautisenen APRE DESCRIPTION

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Non-C P&orms ee. }/oftea. P /') 2. rsjorts +ke +lard I'd/ ara of ABB/ITE 27 N < slay, t v.c. su.e, ar I%Iaw Ska;oe, willi >,

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' NOTtPICATIONS YE$

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

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

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SAP-1165 i

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

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• 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

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Topic A 88/Z 7~f 2-7/l/ ' h/dy F~a// ares How was topic firstidentified?

A/e A/ E-J# 7 2-List correspondence, documend, telecons applicable to the determination of the substantial safety hazard.

A/ &A/

Af8 bow f-#-

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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 ra fe / e s'nu & Ltf r

s Date 7-Jir.//

6 Signatures:

Reviewer

/ FA: 'M s

e Appropriate Furfctional Manager 44/M/d ~

Date 74 M X #/4/fA--

2_

Date 7/s-/(2 Manager, Nuclor Licensing '

(/

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& Operating Experience 3.

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

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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

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Date 7//f/M

/

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

/

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 Date l

Signature l

Manager, Nuclear Licensing & Operating Experience Date Closedin RT5: Signature Date t

I Transmitted to Records Management Signature If review cannot be completed within 60 days of discovery date, an interim report must be submitted to the NOTE:

l NRC within that same 60 day timeframe.

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