IR 05000327/1980012

Requests That Encl IE Insp Rept 50-327/80-12 Be Forwarded to Appropriate Branch.Rept Has Not Yet Been Reviewed by Licensee for Proprietary Info

ML20062H678
Person / Time
Site:	Sequoyah
Issue date:	04/22/1980
From:	Murphy C NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
To:	Thornburg H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
Shared Package
ML20062H675	List: IR 05000327/1980012 ML20062H670 ML20062H676 ML20062H682 ML20062H690 ML20062H693 ML20062H695 ML20062H700 ML20062H704 ML20062H707 ML20062H710 ML20062H713 ML20062H719
References
NUDOCS 8008210243
Download: ML20062H678 (1)

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APR 2 2 'E0

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55D:S 50-327

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WJOT.'.';TC ICR: TT. D. S.o: ' urg, Dir:ctor, Civd.s f on of T:c=.=r Crnet t>:ttes

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? ?9 :!: C. E. Murphy, Chief, ?.ee:ter Cenetre: tion :=d C= cia ::rieg Sep;srt 3re.n h, III 0;".:JEC:

T.!! PE?'J"if 50. 50-327/00-12 CT.~~EUI?ic E'S?!CIO:t ?:7.~3D -

TO ET. CAT RI.? AIR 0? SI')DCT.sa mI; I p;2g ,uy;;;g g,,;,,;

e 7 t ,:t n s cuhject repert to coelored. It is to be noted that the report bcs :st bec: :: .feved es yet by the licenses for proprietary infor:stics c.s described in 13 C7P. 2.77 Since this is a sensitive issue, it is requ:stad t'.ut -ou for.srd this

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r:;crt to the c.pproprista branch is h*R*. Divicies of Pr: ject P.inag--ant for

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Reactor Constructics 4.nd Engineeri=g

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?nclec 32 II temrt t'.s. 53-327/W1:

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NUCL EAR R EGUL ATCiiY CC'd.*4tSSION R C T.iiC. !!

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x. n 1 5 .. .::3 In Ecply Refer To: "

RI!:fXV 10-327/EO-12

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50-323/S0-07 Tennessee Valley Authority ATTN: H. G. Parris

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.anager of Power 100A Chestnut Street Tower II Chattanooga, TN 37401 Gentlenen:

This refers to the inspection conducted by P. K. VanDoors of this office on

" arch 17-20, 1980

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of activities authorined by NRC Operating I.icense No,. DPR-77

~ and Construction Permit No. CPPR-73 for the Sequoyah facilities, and to the discussion inspectio of our findings held with T. 3. Northern at the conclusion of the Areas examined during the inspection and our findings are discussed in the enclosed inspection report. '*ithin -

these areas, the inspection c:nsisted of selective exa=inations of procedures and representative records, interviews with personnel, and observations by the inspector <

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ithin the scope of' this~ in' spec' tion, no ite=s of nonco=pliance were disclose One new unresolved item resulted from this icspection and is discussed in the enclosed report. This item will be examined during subsequent inspection In accordance vitt Section 2.790 of the NRC's " Rules of Practice", Part 2, Title 10, Code of Tederal Regulations, a copy of this letter and the enclosed inspection report will be placed in the NRC's Public Document Room. If this report contains any information that you (or your contractor) believe to be proprietary, it is necessary that you =ake a written application within 20 days to this office to withhold such infor=ation from public disclosure. Any such application =ust include a full statement of the reasons on the basis of which it is claimed that the infor=ation is proprietary, and should be prepared so that proprietarf infor=ation identified in the application is contained in a separate part of the docu=ent. If we do not hear from you in this regard within the specified period, the report will be placed in the Public Document Roo .

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5:sould yc.u have any questions ecnentning this lett er, se vill be glad to diseass the= with yo ..

Sincerely,

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L-C. E. Murphy, .

Reactor Censtruction and Engineering Support 3 ranch Enclosures:

Inspection Keport Nos. 50-327/S0-12 and 50-3:S/80-07 cc v/ecc1:

G. G. Stack, Project Manager

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P. O. Box 2000 .

Datsy, .N 37319 J. M. Ballentine Plant Superittendent P. O. Box 2000 Daisy, TN 37319 3. T. Cox <

'00 Cex.merce Street ---

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Knoxville, TN 37902 M. J. Surrynski, Project Engineer

'C0 Chestnut Street Tever II Chatt:r.coga, TN 37401 T. 3. Northern Construction Engineer Post Office Sex 2000 Spring City, TN 37381 H. N. Culver

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'00 C:=merce Avenue Knoxville, TN 37902

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Ecport Nos. 50-327/30-12 and 50-323/30-07 *

Lice:see: Tenne:see Valley Authority 500A Chestnut Street Cha ttan:ega , 3 37101 Tac:lity Name: Sequoyah 3:cket Nos. 50-327 and 50-328 Li:ca:e Nos. 3?R-77 and C??R-73 Inspe:tice at Sequ:yah Nuclear Plant near Chattaccoga, Te::essee I:s;eeior: O. ' 1 S, </ /5~ y,o

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P. K. Va:Dcor: *

Cate Signed Ac:::panying Perso:sel: L. D. Zajac (Training)

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npproved by:_!_e}' l

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A . Ts . Herdt, Sectic: Ch2ef, RCIS 3ra:ch Cate Signed

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I::pectie: :: . March 17-20, 1980 '

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Areas 1:spected This special, a::cunced inspectie: involved 62 inspector-heurs c: si.e in the areas of prese:vice inspectie: (U=it 2) and review cf actie s take: to assure scu:d:ess of the pressurizer relief pipe (Unit 1).

Results Of .he two areas inspected, :o ite=s of none::pliance or deviatic:s were ide=tifie .

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DETAILS

. Persens Contacted Licensee Employees V. F. ?:pp, Assistant Plant Superintendent

• T. E. N rther=, Jr., Construction I:gineer

• L. V. Jones, Supervisor, Mechanical & Welding Inspection Unit

• L. McCloud, Nuclear Power QA Supervisor

" M. Munns, Construction QA Supervisor P. Guthrie, Singleten Laboratory Metallurgist C. R. 3rimer, Cutage Director

• K. G. Galloway, Radiographer E. A. Merrick, ENDES Metallurgical Engineer

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V. J. Glasser, Office of Power QA Coordinator s J. H. F:x, Pever Productie: Metallurgist

• J. Lewis, Mechanical Engineer J. R. Haueter, Veldisg E=giceer Other lice:see employees c:ctacted included three c nstructica craftsmen and four technician NRC Reside: I:spector

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• S. D. Butler '

• Atte=ded exit interview Exit Interview The inspection scope and findings were su==arized on March 20, 1980 vith these persons indicated in Paragraph I abov . Licensee Action on Previous Inspection Tindings Not inspecte U: resolved Ite=s Unreselved :tems are matters about which = ore infer =: tion is required to deter =ine whether they are acceptable or may involve none==pliance or deviations. Oce new unresolved item identified during this inspection is discussed is paragraph . Independent Inspection Effort (Unit 2) The inspectors reviewed portiens of the preservice inspectics progra:

(Sarveillance :nstructica No. 114) and piping angle bea= ultrasonic test (UT) Procedure No. UT 1 being employed by TVA. The inspectors cbserved 45-degree UT inspection of weld No. RHRS-182 for confor=::ce

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to program / procedure requirements. ';c t e : Ra!ibrat ion. check perfor:.ed af ter this inspection was u:: successful and, therefore, TVA indicated -

that inspection of this veld would be redone., . Cn March 20, 1980 the inspectors noticed a car! on steel pipe within the Unit 2 containment which had a series of di: coloration spots due to application of a flame heat source. The fisme heat had apparently been used to assist in bending the pipe. The pipe was carked as N ' *-t.5 0-2 3 8, H t . N37511. It was not determined during this inspert:en if a site requirement had been violated. Until it can be determined if this item is in noncompliance this will be unresolved Item N S/80-07-01 - Use of Flame Heat for Pipe Bendin No items of noncompliance or deviations were identifie Review of Actions Concerning Soundness of Pressurizer Relief I.ine (Unit 1) In May 1979, the Unit 1 pressurizer relief line (6-inch stai rless steel pipe) was deformed during hot functional testing of the reactor coolant system. Deformation was corrected by use of a weld draw bead technique. (Previous docu;nentation is provided in RII Report No /79-36, 50-327/79-72 and 50-327/S0-02). By h~dC letter, T/A has been granted relief from post. weld re-hydro testing of the pressurizer relief line based on T/A's contention that full penetration had not been achieved during realign =ent welding. This inspection was conducted to further verify that full penetration was not achieve Based on a March 13 taeeting between T/A and NRC, Office of Nu lear Reactor Regulation (NRR), TVA perfor=ed in place metallographic analysis of the -eld heat affected :eoes (HAZ) of the two groove welds which had been utilized by TlA to affect the line repair. Six HAZ areas were polished utilizing portable field polishing equipment. These areas were electrolytically etched using 10*. exslic acid solution similar to Method A of ASTM A262. This is a st.sndard method to deter =ine whether carbide precipitation (called sensiti:stion) has taken place

at the material grain boundaries. The areas were observed at magnifi-estions up to 400X using a portable field metallurgical microscop The inspectors observed this field metallurgical work in its entirety, including observation of the areas through the microscope. Only slight intermittent ditching vas noted in only several grains of hundreds of grains observed under the microscope. The material was therefore considered to be nonsensiti:ed. ne Isek of a band of sensitization prevented determination of the MZ width. Also noted was a verf small gesin size in cocparision with grain size of a cockup which had been previously welded by TVA to gather data for this repai It is generally considered that smaller grain size imparts improved resistance to intergricular carbide precipitatien. The inspector requested that the portable polishing equipment be utilized on the T/A meckup which contr.ined a known degree of sensitirstion in order to shew that the equipment was capable of providing an adequate metallur-gical pelish. T/A verbally reported to the inspector that the carbide

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