ML20206G435

SER Supporting Employee Concern Element Rept Co 11101-SQN, Contact Between Dissimilar Metals

ML20206G435
Person / Time
Site:	Sequoyah
Issue date:	11/04/1988
From:	NRC OFFICE OF SPECIAL PROJECTS
To:
Shared Package
ML20206G037	List: ML20206G034 ML20206G298 ML20206G302 ML20206G306 ML20206G315 ML20206G319 ML20206G325 ML20206G330 ML20206G337 ML20206G344 ML20206G348 ML20206G352 ML20206G358 ML20206G363 ML20206G366 ML20206G370 ML20206G374 ML20206G380 ML20206G385 ML20206G392 ML20206G396 ML20206G404 ML20206G408 ML20206G410 ML20206G416 ML20206G419 ML20206G426 ML20206G429 ML20206G435 ML20206G438 ML20206G447 ML20206G453 ML20206G457 ML20206G459 ML20206G462 ML20206G466 ML20206G472 ML20206G480 ML20206G486 ML20206G497 ML20206G502 ML20206G509 ML20206G519 ML20206G524 ML20206G529 ML20206G534 ML20206G539 ML20206G543 ML20206G550 ML20206G559 ... further results
References
NUDOCS 8811220278
Download: ML20206G435 (2)

Text

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1 i- i SAFET) EtALUATION REFORT BY THE OFFICE OF SPECIAL PROJECTS l 1

I EMPLOYEE CONCERN ELEMENT REPORT CO 11101-50N. l "COMTACT BETWEEto 0155tH1'.AR f4ETALS",

TEt.f ESSEE VALLEY AUTH0F:!TY f

$ SEQUOYAH h0 CLEAR POLCR PLANT UNITS 1 A 2 l

! DOCKET N05. 50-327 AND 50-328 l t

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l Categcry: Construction (1C000) 4 Sutcatescry: Hangers /Suptcrts (11100)

F.lerent: Coritect Between bissimilar Paterials (11101) j TMs basis fer Elerent Peport C011101-50N, Rev. 3, dated October 31,195E is Setuojah-s cific te;1oyee Concern XX-85-038-001 which states:

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'Sequoya h: 1976 Stainless steel pipe permitted to contact carbon steel  !

structural steel with no stainless steel innert ("shim"); if the i j structural steel is ;eirted with a particular p int that prevents [

detical reaction. This paint can te ruebed off your hand and is

! thrcu;hout the plant." f i

This corcern was evaluated by TVA as potentially nuclear safety-related.

i I I j II. Surrarv of Issue  !

l Tre paict usec to separate carbon steel supports fro:n stainless steel pipe [

will wetr through and allow the carbon steel to come into direct contact with t

the stainless steel. The NRC staff concluded that the reed and requireinents for shirs cr paint should be part c' the issue.

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!!I Evaluation The TiA esalvators reviewed decurentation, including the Quality Technology I

(crpany Iraesticatter Report for ir.ployee Concern XX-65 038 001. They l J performed a walkdown of various areas in the Sequoyah Auxiliary Building to j i

observe examples of the use of paint between stainless steel pipe and carbon steel pipe supports, f

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! Th Ele ert Re;crt noted discrepancies in the Secueyah procedures relatirs to  !

.w . h c' - 4' *

n.ir : u r *cci au tity teing currected. Tre re; ort l

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.h u snira or port to separate statnitf 5 steel frcn, caroon fitti at te ;t;ratures less tr.an 5W T esteeds current incustry standarcs.

f Trere#cre, no technical probler;i;aists anc ne corrective action is recuired. '

I 8811220270 891184 7 DR ADOCK 0500 O

e e l-2 IV. Ccrclusions it.t fJC staf f fo',r.c that the TVA investigation and resolution of the concern as cescribed in Eler.ent Report C011101-SQtt, Rev. 3, is adequate. ,

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