ML18142B860

LER 1975-005-00 for R. E. Ginna, Bus 16 Breaker from B Emergency Generator

ML18142B860
Person / Time
Site:	Ginna
Issue date:	09/15/1975
From:	White L Rochester Gas & Electric Corp
To:	O'Reilly J NRC/IE, NRC Region 1
References
LER 1975-005-00
Download: ML18142B860 (3)

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i i t ROCHESTER GAS AND ELECTRIC CORPORATION o 89 EAS T AVEN UE, ROCHES TER, N.Y. 1 4649 LEON O. WHITE, JR. TELEPHONE VICE PRESIDENT AREA CODE Tld 546-2700 September 15, 1975 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:

Unusual Event 75-05, Bus 16 breaker from "BN Emergency Generator R. E. Ginna Nuclear Power Plant, Unit No. 1 Docket No. 50-244

Dear Mr. O'Reilly:

In accordance with Technical Specifications, Article 6.6.2b, the attached report of Unusual Event 75-05 is hereby submitted. Two additional copies of this letter and the attachment are enclosed.

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

Attachment cc: Mr. Donald F. Knuth (30)

Mr. William G. McDonald (3)

LICENSEE EVENT REPOR CONTROL BLOCK: (PLEA8E PRINT ALL REQUIRED INFORMATlON)

,1 6 LICENSEE LICENSE EVENT,

'NAME LICENSE NUMBER TYPE TYPE Q<g N Y R E G 1 0 0 0 0 0 0 0 0 4 1 1 1 1 ~0033 7 89 14 15 25 26 30 31 32 REPORT REPORT CATEGORY TYPE SOURCE DOCKET NUMBER EVENT DATE REPORT DATE

[oo~Icoww~PO L L 0 5 0 0 2 4 4 0 8 2 2 7 5 0 9 1 5 7 5 7 8 57 58 59 60 61 68 69 74 75 80 I

EVENT DESCRIPTION

@072 During erformance of PT-12 2, ~ 1B Emergency Diesel Generator, the Bus 16 breaker from 7 8 9 80 1B emergency generator (EG) failed on 3 attempts to close manually. The lA EG was 7 89 80

[os) placed in service as required. Electricians and relay technicians inspected breaker and 7 8 9 80

[oa5] switches for loose connections or dirty contacts. None were found that could be attribu 7 8 9 80 gg8 ted to event. Afterwards breaker was successfully (cont'd. in Additional Factors) 7 9 PIEME 80 SYSTEM CAUSE COMPONENT COMPONENT 7

CODE LEERY 8 9 10 IE CODE 11 18 C K T COMPONENT CODE

~

B R K 17 SUPPLER 43 N

44 W

MANUFACTURER 1 2 0 47 48 CAUSE DESCRIPTION

[oOs] NA 7 8 9 80 lOISI 7 8 9 80,.

7 89 80 FACIUTY METHOD OF STATUS 55 POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION

[111]

7 8 9 E ~10 0 NA b NA 10 12 13 44 45 46 80 FORM OF ACTIVITY COATENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE NA NA 7 8 9 10 11 ~

44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION

~o~OO O B NA 7 89 11 18 13 80 PEAS'ONNEL INJURIES NUMBER 'ESCRIPTION

[i<~) ~oo o NA 7 89 11 12 80 OFFSITE CONSEQUENCES

~15 NA 7 8 9 80 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION Q~g NA 7 89 10 80

[i<~] NA 7 89 80 ADDWONAL FAOTDRs (cont'd. from Event Description) operated in "test" 8 times, the EG

[118] started, and the breaker successfull closed on Bus 16. The PORC recommended increased surveillance to close the Bus 16 breaker from the 1B EQ weekly until the Q~g next scheduled monthly periodic test. (Unusual Event 50-244/75-05) ,

7 89 80 NAME: now PHDNE. 7 1 6-546-2700, ext ~ 29 1-2 14 GPO 88l 66T

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