ML17263A323

Initial Part 21 Rept Re High Component Cooling Water Flow Results in flow-induced Vibration of HX Tubes Mfg by Atlas Industrial Mfg Co & Subsequent Tube Degradation.Tubes W/ Through Wall Indications Greater than 70% Plugged

ML17263A323
Person / Time
Site:	Ginna
Issue date:	06/22/1993
From:	Mecredy R ROCHESTER GAS & ELECTRIC CORP.
To:	NRC
References
REF-PT21-93 NUDOCS 9307220286
Download: ML17263A323 (7)

Text

ACCEI.ERATF DOCUMENT DIST 8UTION SYSTEM REGULAT INFORMATION DISTRIBUTION ZSTEM (RIDS)

ACCESSION NBR:9307220286 DOC.DATE: 93/06/22 NOTARIZED: NO DOCKET FACIL:50;2'44 Robert Emmet Ginna Nuclear Plant, Unit 1, Rochester G 05000244 AUTH. NAME AUTHOR AFFILIATION MECREDY,R.C. Rochester Gas a Electric Corp.

RECIP.NAME RECIPIENT AFFILIATION NRC No Detailed Affiliation Given

SUBJECT:

Initial Part 21 rept re high component cooling water flow results in flow-induced vibration of HX tubes mfg by Atlas Industrial Mfg Co & subsequent tube degradation. Tubes w/

through wall indications greater than 70% plugged.

DISTRIBUTION CODE: IE19D COPIES RECEIVED:LTR ENCL SIZE:

TITLE: Part 21 Rept (50 DKT)

NOTES:License Exp date in accordance with 10CFR2,2.109(9/19/72). 05000244 RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD1-3 PD 1 1 JOHNSON,A 1 1 INTERNAL: =OS ROAB 1 1 NRR/DRIL/RVIB 1 1 REG L 01 1 1 RES/DSIR/EIB 1 1

'GN1 1 1 RGN2 1 1 RGN3 1 1 RGN4 1 1 RGNS 1 1 SECY/PDR 1 1 EXTERNAL: INPO RECORD CTR 1 1 NRC PDR 1 1 NSIC SILVER,E 1 1 NOTE TO ALL"RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE/ CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 504-2065) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED: LTTR 15 ENCL 15

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JUN-22-1993 14: 11 TQ 93814928187 P. 81

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ROCIIESTER GAS AND ELECTRIC CORPORATION ~ ee-FAST AVENUE ROCHESfER, N.Y. 'I4649-OD01 YLLCP4ONC A%el coot. '114 546-2700 June 22, 1993 U.S. Nuclear regulatory Commission Operations Center SUBJECI". Notification of 10 CFR Part 21 Defect R.B. Ginna Nuclear Power Plant Docket No. 50-244 In accordance with 10 CFR Part 21, Section 21 (c) (3) (i), the enclosed initial notification is provided via facsimile, to the NRC Operations Center, at (301) 492-8187. Written notification, in accordance with 10 CPR Part 21, Section 21 (c) (3) (ii), willbe provided by July 21, 1993.

Very truly yours,

~C~

Robert C. Mecredy Enclosures PDg.

9307220286 930622 PDR ADQCN 05000244 S '

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JUN-22-1993 14: 12 FRCN R.G. 3E. ADNINISTRAT ION 93814928187 P. 83 E ~

Coatmlled Copy ¹4 Refer to A+1 for TnstmcAions

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8. Corrective Action which has been, is being, or wi11 be taken:

Tubes were examined using eddy current testing. Tubes with through waH indications greater than 7G% were plugged.

8.1 ¹me of individual or organization responsible for the action:

8.2 Length of time that has been or will be taken to compIete the action:

Tubes were p1ugged in April 1993, during the annual refueling and maintenance outage.

9. Any advice related to the defect or failure to comply about the fadlity, activity, or basic component that has been, is being, or wiH be given to Rodmter Gas and Electric:

Future actions wi11 include control of maximum flow through the CWV heat exchangers.

For any additional information, contact Steven T. Adams - Superintendent Support Services at 315/524~, extension 494.

TOTAL P.83

JUN-22-1993 14: 11 FROM R.G. KE. ADMINISTRATION 9381492S1S7 P. 82 ControUed Copy f4 Ro&r te A<1 fee Iaetructiono Date:

1. NAME: Robert C. Mecredy TITLE: Vice-President Ginna Nuclear Production ADDRESS: Rochester Gas & Hectric 89 East Avenue Rochester, NY 14649 2 I'ACILITY.'.E.Ginna Nuclear Power Station DOCKET:

3. Activity, or basic component suppHed which fails to comply or contains a defect:

Component Cooling Water Heat Endanger 4, Firm supplying the basic component which fails to comply or contains a defect:

AQas Industrial Mauulhcturing Company Nature of the defect or failure to comply and the safety hazard which is created or could be created by such a defect or failure to comply:

High component cooling wana. flow results in flow-induced vibration of the heat exchange tubes, and subsequent tube degradation.

6. Date on which the information of such defect or failure to comply was obtained:

April 19, 1993

7. In the case of a basic component which contains a defect or fails to comply, the number and locations of all such components in use at, supplied for, or being supplied at Ginna Station:

NUMBER: Two LUCATIU55: AmdTiary Building

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