ML18143A497

LER 1976-006-00 for R.E. Ginna, Malfunction of Undervoltage Relay During Surveillance Test on 2/6/1976

ML18143A497
Person / Time
Site:	Ginna
Issue date:	02/19/1976
From:	White L Rochester Gas & Electric Corp
To:	O'Reilly J NRC/IE, NRC Region 1
References
LER 1976-006-00
Download: ML18143A497 (6)

Text

NRC Fonw 196 v.s. NUCLEAR nI:-ovLATonv coMv!ssio ITDOCKET NUMBER

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~ 50-244 I'ILE NvMDER I

p NRC DISTR IDUTION I!on PART 60 l)OC I<ET I'stIAl'ER IAL XNCXDENT REPORT "RO ~: ROCHESTER GAS 6 ELECTRIC CORP ROCHESTER, NY 2-19-76 MR J P O'Reilly DATE RECEIVED L D WHITE, JR 2-24'-76 ETTER QNOTORIZED pnop. INPUT F NUMBER Ol. COPIES RECEIVED Dn IG INAL VNC I.ASS IF I E D 30 Qcor v DESCRIPTION ENCLOSV RE LTR TRANS THE FOLLOWING... ~ ....... LICENSEE.'EVENT REPORT 50'-244/76-OA (30-DAY)

ON 2-6-76 RE MALFUNCTION OF UNDERVOLTAGE RELAY DURING SURVEILLANCE TEST... ~ ....

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ew r' ROCHESTER GAS AND ELECTRIC CORPORATION o 89 EAST AVENUE, ROCHESTEI', N.Y. 14649 LEON D. WHITE, JA. r slspHO Ms VLCC I nSSiOSI~r *scA coos res 546 2700 February'19, 1976 r"I ggg '" ',) ~ "(B t'lie Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region I 631 Park Avenue King of Prussia, Pennsylvania 19406

Subject:

Reportable Occurrence 76-06 (30-day report), Malfunction of Undervoltage Relay during surveillance test R. E. Ginna Nuclear Power Plant, Unit No. 1 Docket No. 50-244

Dear Mr. O'Reilly:

In accordance with Technical Specifications, Article 6.9.2b, the attached report of Reportable Occurrence 76-06, 30-day, is hereby submitted. Two additional copies of this letter and the attachment are enclosed.

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

Attachment cc: Mr. John G. Davis (30)

Mr. William G. McDonald (3)

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'CENSEE EVENT REPORT 4

CONTROL BLOCK: (PLEA'LT 1 PRINT ALL REQUIRED INFORMATION)

LICENSEE LICFNSE EVENT NAME LICENSE NUMBER TYPE

~01 N Y R E G 1 0 0 0 0 0 0 0 0 0 4 1 1 1 1 TYPE

~0032

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7 89 14 15 25 26 30 31 32 REPORT REPORT CATEGORY TYPE SOURCE DOCKET NUMBER EVENT DATE REPORT DATE

[oai]coM'r L ~L 0 6 0 0 2 4 4 0 2 0 6 7 6 0 2 1 9 7 6 7 8 57 58 59 60 61 68 69 74 75 80 I

EVENT DESCRIPTION .

During surveillance testing of undervoltage relays, undervoltage device 274/11B failed 7 8 9 ~

to drop to de-energized position after undervoltage signal was simulated. Redundant 80 I

7 89 80

~04 relay 273/11B operated properly. Three previous occurrences of this type were reporte 7 8 9 80 on 6/8/73, 12/13/74 and 8/5/75. All 4 u.v. relays were field stipped to clean 7 8 9 plungers and retested satisfactorily. (Reportable Occurrence 50-244/76-06, 30-day) 80 ppg 7 8 9 PRIE 80 SYSTEM CAUSE COMPONENT COMPONENT CODE CODE COMPONENT CODE SUPPUER MANUFACTURER Ioo7I 7 8 9 10

~IA E R E L A Y X ~N W 1 2 0 N 11 12 17 43 44 47 48 CAUSE DESCRIPTION tops] The u.v. relay plunger malfunction was due to buildup of bushing deposits on plunger

.7 89 80

~09 shaft. The device is a Westinghouse type SV 75-150V ac undervoltage relay. New 7 8 9 80

~10 type relays 'for this application have been tested for (cont'd. under Additional Factors) 7 89 80 FACILVii'TATUS METHOD OF

% POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION Q~g N ~oo o NA b 5

NA 7 8 9 10 12 13 46 FORM OF 80 ACTIVITY COATENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE 1 2 8 K NA 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION

~2 ~OO 0 E NA 7 89 11 12 13 80 PERS'ONNEL INJURIES NUMBER DESCRIPTION

~00 0 NA 7 '89 11 12 80 OFFSITE CONSEQUENCES NA 7 8 9 80 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION s

7 89 10 80 PUBLICITY 7 89 80

, ADDITIONAL FACTORS Q~g (cont'd. from Cause Description) reliability and duly approved for installation during 7 89 80

~19 the present refueling outage.

7 89 80 NAME Dennis Gent PHONE.716/546-2700, ext. 291-216 Gf'0 082 ~ 0 67

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