ML17227A416

Part 21 Rept Re crack-like Indications Found in Three Inch Monel 400 Tee Fitting Supplied by Tioga Pipe Supply Co,Inc. Fabrication Suspended & Metallurgical Exams Conducted.Six Addl Tees Returned to Matl Supplier.Actions Completed

ML17227A416
Person / Time
Site:	Saint Lucie
Issue date:	04/01/1992
From:	Bohlke W FLORIDA POWER & LIGHT CO.
To:	NRC
References
REF-PT21-92 NUDOCS 9205130211
Download: ML17227A416 (6)

Text

ACCFLERATED D UTION DEMONS TION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9205130211 DOC.DATE: 92/04/01 NOTARIZED: NO DOCKET g FACIL:50-335 St. Lucie Plant, Unit 1, Florida Power & Light, Co. 05000335 AUTH. NAME AUTHOR AFFILIATION BOHLKE,W.H. Florida Power 6 Light Co.

RECIP.NAME RECIPIENT AFFILIATION NRC No Detailed Affiliation Given

SUBJECT:

Part 21 rept re crack-like indications found in three inch Monel 400 tee fitting supplied by Tioga Pipe Supply Co,Inc.

Fabrication suspended 6 metallurgical exams conducted. D DISTRIBUTION CODE: IEISD COPIES RECEIVED:LTR TITLE: Part 21 Rept (50 DKT)

J ENCL 0 SIZE:

NOTES:

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD2-2 LA PD2-2 PD D NORRIS,J INTERNAL: AEOD/DSP/ROAB OEA OGCB11 D

NRR/DRIS/RVIB9 D REG FILE Ol RES/DSIR/EIB Nl RGN2 RGN3 RGN4 RGN5 SECY VANDERMEL EXTERNAL: INPO RECORD CTR NRC PDR NSIC SILVERi E R

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NOTE TO ALL "RIDS" RECIPIENTS: ,I S

PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED: LTTR 18 ENCL

~9 PRdN:NUCLEAR LICENSINGIQ TO: NRC OPERATIONS CTR. APR g, $ 999 9:ESAN 9999 P 99 10CPR21 - REPORTZNO OP DEPECTS AND NON COMPLIANCE I ~ NAME AND ADDRESS OP INDIVXDUAMXNPORMZNG NRC M. H. Bohlke, Vice President Nuclear Engineering and Licensing Florida Power l<< Light Company (FPL)

P.O. Box 14000 Zuno Beach, FL 33408 XX ~ NAME OP FACILITY/ACTIVITY/BASICCOMPONENT St. Lucie units 1 6 2 Docket Nos. 50-335/389 3>> Monel 400 Socket Weld Tee Fittings, ASME SB564 Heat Code MA52623 PPL Purchase Order Number 90932-92836 III ~ NAME OP PIRM BUPPLYXNQ COMPONENT Tioga Pipe Supply Company,Inc.

2450 Mheatsheaf Lane P909 BOX 5997 Philadelphia, PA 19137 XV9 NATURE OP DEFECT/SAFETY HASARD A9 DEFEcT: crack-like indications were found in a 3" Monel 400 tee fitting during fabrication of a replacement spool section for Intake Cooling Mater (ICÃ) piping for St. Lucia Unit 1. On January 30, 1992, the FPL Nuclear Division Metallurgical Laboratory concluded that the material of the forged tee did not meet mechanical recpxirements of the ASIDE SB564 specification to which the material was certified, nor did it compare to t'e results reported on the Certified Material Test Report provided by the supplier. Actual test results on the tee indicate that the tensile strength and elongation did not meet ASME Section II, Part B material specification SB564 requirements. Improper heat treatment during the forging process is believed to be the principal cause of the defect.

B. SAFETY HAZARD: The tee fitting was to have been installed in the safety>>related Quality Group C ICW System as part of the ICW pump Lube Water System. A postulated non-ductile failure of the tee combined with failure of a redundant XCW train, under accident conditions, could have resulted in loss of the ultimate heat. sink. As described in VI below, no tees of this heat were installed in either unit.

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J FRQ5I:NLICLEAR LICENSINGIG TO: NRC OPERATIONS CTR. APR l F 1992 9: 28AM 4926 P. 83 Vo DATE OP DXSCOVERY OP DEPRCT The defect was discovered on January 30, 1992 when the FPL Nuclear Division Metallurgical Laboratory concluded that the material was not in accordance with the material specification referenced in XV (A) above.

VI ~ NUMBER AND LOCATION OP COMPONENTS No 3" Monel 400 socket weld tees of this heat are installed in safety-related systems at either St.

Lucia Units 1 or 2.

Bo seven tees were received on FPL Purchase Order 90932-92836. One tee was used in the fabrication described in IV (A) above. Six additional tees of this heat have been returned to the material supplier.

VII'ORRECTIVE ACTXON VIZIER Fabrication was suspended and metallurgical examinationa conducted. Six additional tees of the same heat have been returned by FPL to the material supplier. Corrective action is complete.

0%'HER ZNPORJQLTZON FPL will report this information on the XNPO NUCLEAR NETWORK by April 1, 1992.-

Tioga Pipe Supply Company has been informed of this defect.

This initial notification by facsimile will be followed by formal written notification by April 30, 1992.

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