RBG-37042, Deficiency Rept:Employee Informed NRC of Defect in Forged Replacement Elbow Involving Numerous Areas Where Required Code & Design Min Wall Thickness Was Not Maintained.Licensee Returned Forged Elbow to Supplier

Deficiency Rept:Employee Informed NRC of Defect in Forged Replacement Elbow Involving Numerous Areas Where Required Code & Design Min Wall Thickness Was Not Maintained.Licensee Returned Forged Elbow to Supplier

ML20101F172
Person / Time
Site:	River Bend
Issue date:	06/18/1992
From:	Deddens J GULF STATES UTILITIES CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
RBG-37042, NUDOCS 9206240320
Download: ML20101F172 (4)

Text

_. _ _-..._ . _ _ _ _ _ _ _ _ _ . _ _ _ . _ _._-

[

i GULF ST2LTES UTILITZES COMPANY 459 &

, _ . ,, , u o c , e m , e. r aus, , e a w m., , ,

O F} k ( ha4 ( h (),INdi I A h $' $*'; I June 18, 1992 RBG. 37012 File No. G9.5 U.S. Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555 Gentlemen:

River Bend Station - Unit 1 Qts);st No. 50-45?

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 cibow.

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

Sincerely, W

J. C. Deddens Senior Vice President h s /f) Npf.YQep-/dp I

NVHO/UAIWRil/DNIJDCil/NiiZ/kym Attachment t

l 9206240320 920610 PDR- ADOCK 05000450 / h; 5 PDR j ,q \

J

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 P

y v. 4,w,,,., ....e- ,..y--.- . ~.----.-,,,....% ,,----,-w,,e,,-,.-. ..w-. --,=-ge,v-,.,-.,=,.,y-n,...,,,-.,-w., ~,.-y,.-.----,+,,+--w-'a,-, -- w%,.,p-+-,,.=or'~ w-aw t

. _ _ _ _ _ _ . _ _ . _ _ . _ . _ _ . _ _ ~ - . -

4

(

ATTACHMENT GULF STATES UTILITIES 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. Doddens, 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 compor.ent containing a detect was a forged replacement elbow, Connex sketch E-8634-1. The specified location of the elbow is at the first cibow 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 Systemn, Inc.

1115 Gilman Avenue '

Marietta, Oil 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 l elbow involved nus c us areas where the required code and design ninimum 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".

i Because GSU discovered this deviation prior to installation j' there was no operational impact. However, due to the gross i reduction in wall thickness a substantial safety hazard could l' have been created had this defect remained uncorrected because l- the specified location is the first elbow off of reactor >

pressure-vessel- feedwater nozzle N4A, an unisolable portion-of-the reactor coolant. pressure boundery.

l

'. , - . . . - - _ - - . _ - - - - _- . .... . - - - _ a .. .- . - . - , , . - . - . . . - , - - - - - . . _ . - . . . - .

_. _m._ _ . _ _ _ . _ - . _ _ _ . _ _ _ . _ . _ _ _ _ _ _ _ _ . . _ _ _ _ . _ . _ _

1 l

l i

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 ,

, wall violations on Julie 5, 1992. GSU's evaluation of the '

i condition per 10CFR21 determined the condition to be reportable on June 18, 1992.  !

6. In the case of a basic component which contains a defect or 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 'cgulations of 10CFR21:

The affccted basic component is the forged elbow, Connex ,

sketch E-8634-1, supplicd 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 relatc-1 to the defect or f ailure to comply about the facility, activity, or basic component that has been, is being, or will be given to purchasers or licenseen:

Not applicable.

1.

I P

-e- , ,,..#.. , ~ . . , _ - . . , _ . . . , . _ , ~ . , , , . , , . . . . , _ , , . _ _ , , _ . _ . ~ _ , . . . . . . . . . _ . . . , . , , , _ . . _ . , . , . . , ....,,.e.,, , , , , . , . . , -