ML18142A980

LER 1978-009-00 for R. E. Ginna, Bus 18 Breaker from a Emergency Generator Overcurrent Relay

ML18142A980
Person / Time
Site:	Ginna
Issue date:	03/12/1976
From:	White L Rochester Gas & Electric Corp
To:	O'Reilly J NRC/IE, NRC Region 1
References
LER 1978-009-00
Download: ML18142A980 (5)

Text

NRC FORM 195 I2.76) t NRC DISTRIBUTION FoR PART 50 DOCKET MATERIAL U.S. NUCLEAR REGULATORY COMM lN OOCI:ET NUMBER 5 0>>

FILE NUMBER C/C INCIDENT REPORT FROM: DATE OF DOCUMENT Mr Rochester Gas 6 Elec 3-22-76 Rochester, NY DATE RECEIVED Jr O'Reil,ly'fLETTE L D White 3-26-76 R 0 NO TO 8 IZ E D PROP INPUT FORM NUMBER OF COPIES RECEIVED 0 OR IGINAL @UNCLASSIFIED SCOPY none signed DESCRIPTION ENCLOSURE Ltr trans the following: Reportable Occurrence iP76-09 (30 Day Rpt) concerning gus 18 breaker from "A" emergency generator overcurrent relay.......,.......

on 2-27-76.....

(one cy encl rec'd)

MO~EDggD

DO'-"02'~zj PLANT NAME G irma NOTE! IF PERSONNEL EXPO S INVOLVED SEND DIRECTLY TO KREGER/J COLLINS SAFETY FOR ACTION/INFORMATION ENVIRO 3-29-76 ehf BRANCH CHIEF:

W 3 CYS FOR ACTION LIC ~ ASST:

W/ CYS ACRS CYS HM*BXBC/'NT TO LA INTERNAL DISTRIBUTION FILE NRC PDR ScE 2 SCHROEDER/IPPOLITO NOVAK CHECK TEDE 0 ~CA BAER

'HAO VOLLMER BUN KREGEQ OL NS EXTERNAL DISTRIBUTION CONTROL NUMBER, LPDR TIC NSIC NRC FORM 196 <2-76)

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ROCHESTER GAS AND ELECTRIC CORPORATION 5 89 EAST AVENUE, ROCHESTER, N.Y: /4649 LEON D. WHITE. JII ICLCRNONC VICE I'RC5IOCNT T

ARCA COCC 115 546-2700 e

EGULATORY DXKEy F~LE ~

Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement 05 OgI Region I 631 Park Avenue King of Prussia, Pennsylvania 19406

Subject:

Reportable Occurrence 76-09 (30-day report), Bus 18 breaker from "A" Emergency Generator overcurrent relay 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 76-09, 30-day, is hereby submitted. Two additional copies of this letter and the attachment are enclosed.

Very truly yours, ggJ??7~

L. D. White, Jr.

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

Mr. William G. McDonald (3)

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.LER 76-09/3L ENSEE EVENT REPORT.

CONTROL BLOCK: (PLEASE PRINT ALL REQUIRED INFORMATION)

IJCEN SEE LICENSE EVENT NAME LICENSE NUMBEA TYPE TYPE

~01 'N Y R E G 1 0 0 0 0 0 0 0 0 0 4 1 1 1 1 ~03

~

7 89 'l4 15 25 26 30 31 32 REPOAT REPORT CATEGORY TYPE SOURCE DOCKET NUMBER EVENT DATE REPORT DATE

[001]00N'1 L ~L 0 5 0 0 2 4 4 0 2 2 7 7 6 0 3 2 2 7 6 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCRIPTION Qpg During preventive maintenance circuit breaker testing with the plant in refueling mode 7 8 9 80 m89 Bus 18 breaker from "A" emergency generator tripped prematurely. Investigation 7 80

[pP~]

showed phase C overcurrent trip relay actuated 6 sec. earlier than desired. Over-7 8 9 80 Qpg current relay was replaced. (Reportable Occurrence 76-09, 30-day) 7 8 9 80

[oaf 7 8 9 PRME 80 SYSTEM'" CAUSE COMPONENT COMPONENT CODE CODE COMPONENT CODE SUPPUEA MANUFACTUAER VIOIATIDN Ioav]

7 8 9

~EE 10 E

11 12 R E L A Y X 17,

~N 43 44 W 1 2 0 47 '8N CAUSE DESCRIPTION toOs] NA Relay is Westinghouse overcurrent tri ing device, 1600 7 8 9 80

~09 amp 60 Hz style no. 24Y4712BAS long delay/short delay. Identical replacement relay 7 8 9 80

~10 was bench tested and field tested satisfactorily.

7 89 FACE.ITY METHOD OF 80 STATUS POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION

~oo o b 7 8 9 10 12 13 44 45 '46 80 FORM OF ACTIVITY COATENT RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE

@~2 ~S . S NA 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION I110I ~oo o E NA 89 12 13 80 PERSONNEL INJURIES NUMBER DESCRIPTION

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

[ice) NA 7 89 10- 80 PUBLICITY NA 7 89 80 ADDITIONAL FACTORS

-Q~g Test provides for application of 3 times rated breaker current. The device did meet 7 89 80 Westinghouse recommended criteria, but not those established as station practice.

7 89 80 NAME: Charles V. Hartlieb PHDNE 7 1 6/546-2700, ext. 29 1-2 1 6 GPO 8'81 8 8T