ML20101R064

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Part 21 Rept Re Defect in Forged Elbow SA234 Wpc.Initially Reported by Util on 920625.Connex Will Audit Quality Sys Prior to Awarding Purchase Orders to Ram Forge to Verify Measurements Taken on Elbow
ML20101R064
Person / Time
Site: River Bend Entergy icon.png
Issue date: 07/08/1992
From: Leininger D
CONNEX PIPE SYSTEMS, INC.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20101R068 List:
References
REF-PT21-92 NUDOCS 9207150212
Download: ML20101R064 (4)
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CONNEX tw oma um lat 94 373 m3 PIPE SYSTEMS nu no m m July 8.1992 U.S. Nuclear Regulatory Commission Document Control Desk Washington,DC 20555 REF: Gulf States Utilities Co. ~ Regert of Defect Dated June 18,1992 RBO 37012 File No. 09.5 River Bend Station UN*

Document No. 50-458 Gendemen:

Connex Pipe Systems. Inc. has completed its investipt an of the defect discovered by Gulf States Utilities Co. (GSU) on the 12" Sch. 80 LR 90' Ellmw S A234 V PC and subsequently, reported in accordance with the requirements of 10CFR21. The following is a summary of the steps that were taken during the investigation to determine an adequate co:Tective action.

Initial Corrective Action was to irmove Ram Forge irom Connex's Approved Vendors List until further investigation could be performed. This was documented on Connex's Corrective Action Request (CAR

  1. 92-007) and verified by copy of Connex's Approved Vendors List.

In addition, Connex was able to determine that the Ram Forge ellow was an isolated occurrence. This was based upon wall thickness measurements taken on numerous elbows at Connex --all of which contained acceptable wall thickness. (See attached Ultrasonic thickness readings)

Connex. accompanied by GSU, went to Rarn Forge to determine the root cause and verify Corrective Action. (See Ram Forge Discrepancy Report) Further investigation while at Ram Forge disclosed the fact

that this particular eltow required ten (10) heats to form the citow within the dye. This was unusual since they normally require two (2) heats. An excess of scale caused by the additional heats necessitated a great deal of grinding. Consequently, the elbow was gimnd below wall and not visible to the eye. Ram

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Forge did not question the wall thickness becausc past experience had shown their elbows to be much heavier. This was demonstrated to Connex and GSU from readings taken on a grid pattern on elbows for other customers.

Ram Forge has stated that they will check all elbows for wall thickness on 100% of ASME III orders. The wall thickness measurements will be taken on a grid over the entire elbow. Connex was unable to verify implementation since there were no ASME Ill orders for cibows in house at Ram Forge, L

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CONNEX nn sonas U.S. Nuclear Regulatory Commission Page 2 of 2 REF: Gulf States Utilities Co. Report of Defect Dated June 18.1992.RBO 37(M2 File No. 09.5 River Bend Statkm Unit #1 Document No. 50-458 Psior to awarding Purchase Orders to Ram Forge. Connes shall audit their Quality System and assure provisions are in place to recomplish Ram Forge's corrective action and verify measurements taken on cibows at that time. Ram Forge will remain off Connes's Approved Vendors List until the audit is performed and is acceptable to Connex.

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D.J. L iger V.P. Technical Services attachments DJL cak ec: Ram Forge and Steel Inc.

P.O. Box $92 Industrial Park Road Navasota. Texas 77868 Mr. D. C. Deddens Senior Vice President River Bend Nuclear Group Gulf States Utilities P.O. Box 220 St.Francisville,LA 70775 U. S. Nuclear Regulatory Conaission 611 Ryan Plaza Drive Suite 4(X)

Arlington.TX 76011 NRC Resident inspectkm P.O. Box 1051 St.Francisville.LA 70775 i

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teemesu m no i n614.1136463 PIPE SYSTEMS t.u mss rea June 25,1992 U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 REF.: Gulf States Utilitic_ Co. - Report of Defect Dated June 18,1992- RBC 37042 File No. C9.5 River Bend Station - Unit 1 Document No. 50-458 Gentlemen:

We have reviewed Gulf States Utilities' Report of Defect per 10CFR21 and offer the following clarifications and additional information:

The forged replacement elbow was purchased by Connex Pipe Systems on Purchase Order E8634-2 Item #1 from Ram Forge and shipped direct to Gulf States Utilities River Bend Station Unit 1 from Ram Forge and Steel Inc., P.O. Box 592, Industrial Park Road, Navasota, Texas 77868.

The elbow was then accepted by Gulf States Utilities River Bend Station -

Unit 1 and was in the process of being machined when the defect was discovered. Upon notification by Gulf States, the elbow was returned to Connex to be repaired.

Connex reworked the elbow in accordance with ASME III NB-4130. The rework of the elbow was documented on Connex sketch E8630-1. The elbow was then returned to Gulf States Utilities River Bend Station Unit 1 along with the associated documentation.

h. addition, Connex took immediate corrective action by removing Ram Forge from Connex's Approved Vendors List until a fullinvestigation could be completed.

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. 'CONNEX PM $ftfl#8 U.S. Nuclear Regulatory Commission June 25,1992 2 of 7 Document Control Desk Washington,DC 20555 i P

Preliminary results o' our investigation indicate that this was an isolated

- occurrence; however, specific cause has yet to be determined.

We hope this additional information will help supplement the report issued by Gulf States Utilities.

- Sincerely, CONNEX P:PE SYSTEMS,INC. -

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- D. Leininger V.P. Technical " i . L - -

DJL:cak cc: U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive Suite 400

' Arlington,TX 76011 l-NRC Resident inspection P.O. Box 1051

' St. Francisville, LA 70775 Mr. D. C. Deddens Senior Vice President 1

. River Bend Nuclear Group Gulf States Utilities P.O. Box 220 St. Francisville, LA 70775.

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June 18, 1992 REG 37012 File No. G9.5 U.S. Nuclear Regulatory Commission Documeni Control Desk Washington, D.C. 20555 Gentlemen:

River Bend Station - Unit 1 Docket No. 50-458 Pursuant to the requirements of 10CFR21.21(c)(3), Gulf States Utilities Company (GSU)is submitting this written report of a defect in a forged replacement elbow.

The specified location for the elbow is in a 12" feedwater line. The attached report provides the information required by 10CFR21,21.

Sincerely, f

J. C. Deddens Senior Vice President

- River Bend Nuclear Group VHO/LM - RH/DNUDCH/NHZ/kym Attachment I

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cc: U.S. Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555 U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011 NRC Resident Inspector P.O. Box 1051 St. Francisville, LA 70775 Connex Pipe Systems, Inc.

1115 Gilman Avenue Marietta, OH 45750 Attn: Mr. Kevin Welch m

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t ATTACHMENT GULF STATES UTILITIED COMPANY River Dend Station - Unit 1 Report of a Defect Per 10CFR21 Connex Pipe Systems, Inc.

1. Name and address of individual (s) informing the NRC:

Mr. J. C. Deddens, Senior Vice President, Gulf States Utilities Company Address: Post Office Box 220 St. Francisville, LA 70775

2. Identification of the facility, the activity, or the basic component supplied for the f acility or activity which f ails to comply or contains a defect:

The basic componaut containing a defect was a forged replacement elbow, Connex sketch E-8634-1. The specified location of the elbow is at the first elbow off of reactor pressure vessel feedwater nozzle N4A.

3. Identification of the firm constructing or supplying the basic component which fails to comply or contains a defect:

Connex Pipe Systems, Inc.

1115 Gilman Avenue Marietta, OH 45750

4. Nature of the defect or failure to comply and the safety hazard which is created:

The defect, revealed by Ultrasonic testing (UT) of the forged elbow involved numerous areas where the required code and design minimum wall thickness was not maintained. The nominal wall thickness was 0.688 and the code minimum thickness was 0.535". The minimum wall thickness measured was 0.378".

Because GSU discovered this deviation prior to installation there was no operational impact. However, due to the gross reduction in vall thickness a substartial safety hazard could have been created had this defect remained uncorrected because the specified location is the first elbow off of reactor pressure vessel feedwater nozzle N4A, an unisolable portion of the reactor coolant pressure boundary,

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5. The date on which the information of the defect or failure to comply was obtained:

A condition report (CR) was issued indentifying the minimum I wall violations on June 5, 1992. GSU's evaluation of the condition per 10CFR21 determined l the condition to be i reportable on June 18, 1992. ,

6. In the case of a basic component which contains a de"ect or j f ails to comply, the number and location of all the components  ;

in use at, supplied for, or being supplied for one or more facilities or activities subject to the regulations of 10CFR21:

The affected basic component is the forged elbow, Connex sketch E-8634-1, supplied to GSU as a one-time replacement

-part.

7.~ The corrective action which has been, or will be taken; the name'of-the individual or organization responsible for the action; and the length of time that has been or will be taken to complete the action:

GSU returned the forged elbow-to the supplier. The component was reworked to ASME III, NB-4130 and returned to GSU.

8. Any advice related to the defect or failure to comply about-the facility, activity, or basic component that has been, is being, or will be given to purchasers or licensees:

Not applicable.

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' GOLF STATES UTILITIES RIVER' BEND STATION Component Data Report t 53333333848535833333333238385233332555883333333338385235322233333333333333 REFERENCE #: 200322 COMPONENT ID: FWS010037L2 TYPE: Elbow DRAWING No.: EP-17F DESCRIPTION : HWO#R145249 ELBOW (PRESERVICE)

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[jlOutesseDioneter  : 12 N /

Asaal Range (range)  : .A i ,',4,,L, 4A Circ. Range (1 99) 1 (A.2,Ah,AS,AC.,.)  ;

I Hrial (ring) Ref.  :

Ring i Loc. N 7

h

! Ring Spectnq  : 4" '

{' Areal Direcolon  : US or OS I

Jere. Direction  : CW or CCW i TEST INFO Upstream jl Ces enent Otsostrees Noa Wall : Al X N/

h Win.Wa ll : # A h5 ./ A -

ITESTSUWWARY Operater Name :

lastrument e I QW Seego - QCTE 4 39-onc)O l Probe 8 :A03077 j Col. Bleok  : _ Gc.t e-op5 0u e il / 08/ 9 P- ,

i

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  • ta==se Pw % w 11tltemasseen un== ow c:ta LETTER No.: N/4 a e fdumane 414 372.f su siasis s4a. s41 N/A w . .. . TRANS. No.:

PM SY311M8 A ==== st me ines = s, JOB: 92-6 AVL TO: L. Evans 3. McConkey ANI R. Davis Estimating DATE: 6-8-92 T. Long M. Huck K. Welch B. Day i C. Knaus-2 R. Nodes D. Sch FROM: D. L. Schaffer

'e r D. Leininger J. Sweeney A ttn Customer P.O.

NOTE: Attached are the following listed documents. Please receipt one copy of this form and return immediately. This is our record of your having received the referenced documen ts.

Received by Date Sign i Return Required YE5 g NO FILMS

_ _ _ CERTIFIED PRINTS Comments: Please sisn & Return PRINTS FOR QA APPRoy AL

_ VELLUM FOR APPROVAL SE PI A PRELIMINA RY xx OTHER M.BIL LS

_ ORIGINAL FINAL INFORMATION ONLY QTY. DOCUMENT NO. AND TITLE REV. QTY. DOCUMENT NO. AND TITLE R E V.

I an. AVL Index 92-6 DELETIONS Ram Forste & Steel. Inc,

. hlb M

S L

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