ML20086P159

Part 21 Rept Re Microscopic Cracks in Fuel Nozzle Tip from Mfg Lot D87001.Cracks Perpendicular to Axis of Nozzle & Extend Through Case Hardening & Stop at Core.Interim/Final Report Will Be Forwarded as Further Development Occurs

ML20086P159
Person / Time
Site:	Palo Verde, South Texas
Issue date:	10/31/1991
From:	Labrun H COOPER INDUSTRIES, INC.
To:	NRC OFFICE OF ENFORCEMENT (OE)
References
REF-PT21-91 QGC-8543, NUDOCS 9112260227
Download: ML20086P159 (2)

Text

L t Cttp:t infu:tr6:n

.. N f[ S $,' C I ***'**"'"' " * " * " *"

% cm u samm 4 T ? GMt Fv;) .

COOPER October 31,1991 OCG 8543 U. S. Nuclea Regulatory Commission Office of Inspection and Enforcement C.ie V/. lite Flint North 11555 Rockville Pike Pockville, MD 20852 Attention: Director of Inspection and Enforcement

Subject:

Fue: Nozzle tip 10 CFR Part 21 - Interim Report Gentlemen:

Arizona Public Service notified Cooper Bessemer of a patential concem related to the ongoing fuel nozz!e tip 10 CFR Part 21 investigation. APS has identified microscopic cracks in one nozzle that came from manufacturing lot number D87001. The cracks are

,nerpendicular to the axis of the nozzle extending through the case hardening and stoppin0 at the core.

There are no instances of reported failurs related to lot number D87001. The cracks, identified by Arizona, are so oriented that one would conclude, they will not lend themselves to failure. However, Cooper Bessemer is recommending that the lot be added to tests being performed by Houston Lighting and Power.

An interim or final report will be forwarded to you as fur *.her development occurs.

Sincerely, .

l

)

, / ,r/ ;

., J H. A. LaBrun cc: Arizona Public Service Corrpany ATTN: Manager of compliance P.O. Bor 52034, Mail Station 6148 Phoenix, Arizona 85072 2034 9112260227 9isobj ~  ?

POR ADOCK 0500o498 /

s poR 'I O

Q~ e ..;

_ Page 2 QCG-8543 a '10/31/91 J. S. Baron CES/GC

-- A. E. Bice OES/GC D. T Blizzard - - CES/GC W. O. Ferguson CES/MV

- A. D. Gillette CES/GC W. Haass (NRC)

. J. M. Horne. CES/GC

. W. J. Jump Manager Nuclear Licensing Houston Light and Power ,

P.O. Box 308 Room 5500/MS N5010 Wadsworth, TX 77483-R. L. Pettis _ (NRC)

M. A. Schleigh

~

CES/GC B. R. Sedelmyer . CES/GC P. ~J. Shimek' CES/GC S.'Timmaraju_ (HL&P)

. Owners Group Technical Representatives Frank Czysz Terry O'Brien Perinsylvania Power and Light Commonwealth Edison Company 2 North Ninth Street A6 3 1400 Opus Place Allentown, PA 18101 Suite 400 Downers Grove, IL 60515 Darren Dageforde ~ NeilThibodaux Nebraska Public Power District Arizona Public Service P.O.' Box 98 - P.O. Box 52034 Brownsville, NE 68321 Phoenix, AZ 85072 2034 Ted Fryar - Keith Ward Houston Light and Power Co. Niagara Mohawk Power Corp.

P.O. Box 308 301 Plainfield Road Wadsworth, TX 77483 Syracuse, NY 13212 A. G. Killinger-' Thomas Watkins MPR Associates, loc, Louisiana Power & Light 1050 Connecticut Avenue, NW P.O. Box B Washington, DC 20036 Killona, LA 70066-0751 -

File: K 5Fa 19 Fuel Nozzle Tips

. ,