ML19312D209

Forwards Revised Response to Noncompliance Item 553/79-17-01 Re Containment Shell Welds Identified in NRC 800110 Ltr

ML19312D209
Person / Time
Site:	Phipps Bend
Issue date:	03/14/1980
From:	Mills L TENNESSEE VALLEY AUTHORITY
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
NUDOCS 8003210506
Download: ML19312D209 (3)

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TENNESSEE VALLEY AUT'H'ORITY- 7 h;

' CHATTANOOGA. TENNESSEE 374ot h

'400 Chestnu't: Street Tower II d March 14, 1980-i Mr. James P.10'Reilly, - Director.

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0ffice of Inspection.and Enforcement

~. U.S.-; Nuclear Regulatory Commission ;

m. . Region II - Suite:3100:

101 Marietta : Street

' Atlanta, Georgia .30303 Dear Mr.-O'Reillyi_

hs requested ~by F.'W.1 Cantrell-of your staff on' March 7- 1980, enclosed'

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, is'a revised response.to noncompliance item 553/79-17-01, identified H in l C. E. Murphy.'s letter dated January 10, 1980,- RII:BRC 50-553/79-17',

' 50-554/79-16.i This response supersed_es our' previous response dated

' February.1,:1980, for noncompliance: item 553/79-17-01.~ - If you have ~

any' questions.regarding.this subject,

please call Jim Domer at

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FTS 854-2014'.'

Very truly:yours,.

p TENNESSEE VALLEY AUTHORITY IM ) M L. M. Mills, Manager-

' Nuclear _ Regulation and Safety Enclosure ^ . ,

cci LMr., Victor Stello, Director _(Enclosure).

Office'of Inspection and Enforcement

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.U.'S.- Nuclear' Regulatory Commission"

. Washington,- DC. 20555. -

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Nb ENCLOSUREL

- REVISED RESPONSE TOLNRC-0IE LETTER

- 1FROM C. E.; MURPHY TO H. G. PARRIS

. DATED JANUARY 10, 1930

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REFERENCE:

RII:BRC- 50-553/79-17,L50-554/79-16) fThis~ report isia' revised response to'the Notice of Violation described inlAppendix'A, Item A, of the OIE Inspection Report referenced above, s 7This;is provided as? requested by Inspector lF.-W. Cantrell in our

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' telephone conversation with him on March 7,1980~. This report supersedes

. our . previous report dated February ~1,1980, on Infraction 553/79-17-01.

-Our: response to; Infraction 553/79-17-02 is unchanged.

.Noncomplihnce' Item --Infraction 553/79-17-01

, A. -- As required l by Criterion V of Appendix B to 10CFh30,. and as

< implemented by paragraph 17.1A.S.of:the FSAR, " Activities affecting quality shall'be prescribed by documented instructions,

procedures, and drawings . . . and shall be accomplished in

. -accordanc~e with these instructions, procedures, and drawings."

. Paragraph-14.9 ofEprocess specification 1.M.1.2(b) of General Construction Specification G-29M, applicable to containment shell Twelding, limitsithe_ bead width resulting from weaving to 5/8-inch maximum for'the gas metal arc (including flux coced) process.

Contrary-to the above, on December 12, 1979, bead widths of 3/4-inch'to

• .7/8-inch en containment shell' welds IT 2301629 and IT 2301631, welded

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Twith the flux cored ~ process, were observed. Discussions with the inspection

' personnel revealed that weaving the full width' of the -joint until' the joint is.ful1~has been the-practice in the past. This results in a bead width of one ' inch or greater at the top of the joint.'

This:is an infraction.

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REVISED RESPONSE s1. ' Corrective' Steps'Taken and'Results-Achieved

- AllLwork.-on the two containment shell Celds cited in the infraction was' stopped. LA quality control. investigation report (QCIR) was-written to: document and. follow this situation.: All gas metal' arc flux core welding:in:accordance with General: Construction lSpecificat' ion G-29M is now being accomplished with a 5/8-inch

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l maximum weave 1 width.

.  : ' Disposition of theseitwo velds was predicated on the results of

, c  ; test. performed at'TVA's Singleton lbterials. Engineering Laboratories-.

0  ;(Singleton) to; determine.the effect of weave width 11arger than.5/S' inch.

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-Tho'. results Jofath~c; initial ' test"ati. Singleton on which(the

.> - -y - : February l1,!1980, response wasl based indicated that; the properties' .,

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veld' and f adjacentiheat-affected zone met . the ; applicable section Lof ? the . ASME Code, Sub.section KE, with the llarger weave width. However,

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tlater test'resultsifailed:to %upportLthe originalsconclusion. As a

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%%" 3 result of;these(1 ster.:'te't-findings, s NCR PBN-067.has=been deemed

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.  :!' reportable'Eunderjl0CFR50.55(e).- This condition was; reported to; fInspector R. W.1 Wright >on March 6,31980.- In NCR'PBN-067fR1,-

i' eTVA'hasirecommended:the. removal of--the) weld metal disposited in

• - , x iexcess ;of the :5/8-inch maximum.we'a veiwidth requireme'nt. - However,.

' ' 2 the final decision 'on corrective actions- will be l determined by .thef

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. Technical? Engineer,-General Electric /C.2F. Braun;

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(2.1 iActi$n TakenLto Prevent' Recurrence 2

)Craftisupervision andlqu'ality control inspectors were instructed

.E- fon Decemberil7; 1979, to conform.ito requirements of applicable 4

' specifications".and codes on;;all, work.

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3.. IDate When Full <Comol ance Was icnieved.

[ Full compliance on thrwelds made with' excessive weave widEhs

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.will not be attained.until:NCR PBN-067 Riiis dispositioned and

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corrective actions'on lthose welds are~ accomplished. If:lC; F. Braun:

, accepts.; th'e .:TVA, recommendation,' the 7 work' is ' expected- to be , completed .

} by; September;30,;1980.s A lAll' gas: metal arc flux core-welding 1 performed'sub' sequent to-

-December:17,-1979,lhas been in full compliance with GenerallConstruction s

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