ML20010A002

RO 50-321/1981-081:on 810729,while Performing Review in Response to IE Bulletin 79-14,Bechtel Engineer Discovered RHR-SW Piping in Vicinity of RHR-SW Strainers Was Inadequately Supported.Caused by Inadequate Design

ML20010A002
Person / Time
Site:	Hatch
Issue date:	07/30/1981
From:	Manry M GEORGIA POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
IEB-79-14, RO-50-321-1981, NUDOCS 8108100369
Download: ML20010A002 (2)

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01 BAXLEY GEORG'IA 31513~

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PMS MR. JAMES P. O'REILLY J

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UNITED ' STATES' NUCLEAR RE7tJI.ATORY CO)NISSION DIRECTOR OF-INSPECTION AND ENFORCEMENT-

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REGION II" SUITE 3100

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101 MARIETTA STREET

--. _ ATLANTA,_ GEORGIA 30303._.

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SUBJECT:

llatch Unit 1,

Docket No.

50-321 Notification o f" Reportable Occurrence No. 50- 3 2.1/19 R1.0f 1..

NOTIFIED:_ V.

Drownley

-DATE:

7-29-81 g

DATA M,7-30iBT TINE:' 4:00 PM N J. '__. :_

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"3 EDESCRIPTION_OF REPORTABLE.0CCURRENCE

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a Initial Condition

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-- Unit I was-in steady s,. ate operation.

.g Nat ure of__0ccurrence'-

j, s.j As a result of a revice performed inthat. t.he. RilR,59b pipting)hy responsc/to IEB 79-14 the AE- (Bechtc1} it was discovered i n...

the v i c ini t.y..of. the_ BilR-SX.st raj nct s.. wa s. inadeqda telyi suppor t - -

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ed in the horizorttal planc.

I' Inneiliate Cor rec ti ve Act ion'

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Appropriate reporting was initiated.

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i IntiiTFquate design.

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-_Swpicmental Corrective Action Design mod i66ft'~Ilins._ will be liicorpora t ed as soon. as the l

associated design and materials are available.

l-Statbs o[ Redundant

' ~Backuk Systens ot l

Ho Di 1.oo.ps of' VIIRW Vere involv ed. - -The-other - low pressure- ---

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-- ECCS--system.(core spray).was available and-operabic.. -.

Impact Io dthef Unit hone Just ification for Continued Operation j

The stress ratio (computed vs. allowable) based on the actual

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....yic1d.. stresses for__the-._ worst corbination of loads is

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-- - ~ Based on the fact that some safety factor is available contin-ued operation is justified with the understanding that design modifications will be incorporated as soon as the associated

- ' design arid mat erials are avail'abic.

. REG:ONAl DtRECTOR ' -

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DEPUTY DIRECTOR

_ ASSJSTANT.TO D' RECT B1(/Ld,\\

l DIRECTOR, RRPI

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_ DIRE _GT.OR. EEOS __. _. _FIant Manage DIRECTOR, ENF/lNV

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