ML18142A981

LER 1976-008-00 for R. E. Ginna, Abnormal Degradation of Steam Generator Tubes

ML18142A981
Person / Time
Site:	Ginna
Issue date:	03/11/1976
From:	White L Rochester Gas & Electric Corp
To:	O'Reilly J NRC/IE, NRC Region 1
References
LER 1976-008-00
Download: ML18142A981 (5)

Text

U .S. NUCLEAR REGULATORY COMh'IISS ION DOCKET NUMOFB NRC FoBM 395

(<<7G) O- z4 FILE NUMBER NRC DISTRIBUTIONrF~ PART 50 DOCI(ET MATEhlAL

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XNCXDENT REPORT DATE OF DOCUMF.NT Mr O'Reilly '

Rochester Gas & Eihhctric Co 3-1L-76 Rochester, NY DATE RECEIVED L D White Jr 3 $ 6 76 QNOTORIZED PROP INPUT FORM NUMOFR OF COPIES BECEIVFD OLF TTE R C3OBIGINAL gl UN C LASS I F I E D SCOPY nona signed DESCBIP'TION FNCLOSU BE I

Ltr trans the following: Fourteen Day Report re Reportable Occurrence

$P76-08 which concernhd abnormal degradation of steam generator tubes...(1 cy encl rec'd) r

~ Cii'hfQgg PLANT NAME: NOTE: IF PERSONNEL EXPOSURE XS INVOLVED SEND DIRECTLY TO KREGER/J. COLLINS SAFETY FOR ACTION/INFORViATION ENVIRO - - i BRANCH CHIEF:

W/3 CXS FOR ACTION LXC ~ ASST:

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. ROCHESTER GAS AND ELECTR(C CORPORATION o 89 EAST AVENUE, ROCHESTER, N.Y. l4649 T.EON 0, WHITE. JA 7 E E E T'w TS 4 E VTCE PTTESSDETTT ATTLA COTTE 7SO 5TI6 2700 March 11, 1976 OQ'Et FILp Cgpy Mr. James P. O'Reilly, Director s

<gf/pp l0 U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement

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Region I 631 Park Avenue of Prussia, Pennsylvania

'ing 19406

Subject:

Reportable Occurrence 76-08 (14-day report), Abnormal degradation of steam generator tubes R. E. Ginna Nuclear Power Plant, Unit No. 1 Docket No. 50-244

Dear Mr. O'Reilly:

In accordance with Technical Specifications, Article 6.9.2a, the attached report of Reportable Occurrence 76-08, 14-day, is hereby submitted. Two additional copies of this letter and the attachment are enclosed.

Very truly yours, L. D. Whit, Jr.

Attachment 4

cc: Mr. Ernst Volgenau (40) i6 g)cgG Mr. William G. McDonald (3) gT Mr. Robert A. Purple, (3)

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LER 76-08/1T CONTROL BLOCK:

e!ENSEE EVENT REPORT

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(PLEASE PIIIMT ALL REQUIRED INFORMATION) 1 UCENSEE LICENSE .EVENT NAME LICENSE NUMBER TYPE TYPE

~o0~ N Y E E C 1 0 0 0 0 0 0 0 0 0 4 1 1 1 1 ~01

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7 8'9 14 15 25 26 30 31 32 REPORT REPORT CA'TEGORY TYPE SOURCE DOCKET NUMBER EVENT DATE REPORT DATE

[OD1ICON'7 T ~L 0 '5 0 0 2 4 4 0 2 2 7 7 6 0 3 1 1 7 6 7 8 57 58 59 60 6'I 68 69 74 75 80 EVENT DESCRIPTION During the planned eddy current inspection of the Steam Generator,(SG) tubes, 39 tubes 7 89 80 in the '"A" SG inlet and 2 tubes in the "B" SG inlet showed defects above the wastage

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~03 7 89 80 t00j4 limit of 40%. These tubes have been plugged. (Reportable Occurrence 76-08, 14-day) 7 8 9 80

[oas) 7 8 9 80

[os 80 7 8 9 PNME SYSTEM CAUSE COMPONENT COMPONENT CODE CODE COMPONENT CODE SUPPUER MANUFACTURER VCLATION

~os ~CI B H T E X C H ~N W 1 2 0 N 7 8 9.10 11 12 1? 43 44 47 48 e

CAUSE DESCRIPTION

[QDB] Local corrosion of tube OD surface caused by concentrations of residual hos hates .

7 8 9 t00I A complete eddy current program description and report is attached.

7 8 9 7 89 on FAC!LITY METHOD OF STATUS Ie powER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION

~H ~O'O O NA Edd current examination of tubes 7 8 9 10 12 13 44 45 46 80 FORM OF ACTIVITY COATENT RELEASEO OF RELEASE ~ AMOUNT OF ACTIVITY LOCATION OF RELEASE Q1g . 'K 8 NA 7 8 . 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q~~] ~oo o ~B NI1 7 89 11 12 13 80 PERSONNEL INJURIES NUMBER DESCRIPTION

[ig ~00 0 NA 7 89 11 12 80 OFFSITE CONSEQUENCES 7 89 80 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION Q~g 7 89 10 80 PUBLICITY I I

7 89 80 I ADDITIONAL FACTORS pQB An all volatile treatment water chemistry control was started November 197S and 7 89 80

~19 ~adherence to this has been good to date.

7 ~ 89 oo A. E. Curtis, III PHDNE 7 1 6/546-2700, ext 2263

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