ML18143A497
| 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
~ TGI
~ 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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DO Nor/ ggz~agoVp PLANT NA1IE; R.F!. GINNA 81 NOTE: XF PERSONNEL EXPOSURE XS XNVOLVED Sk:ND DIRECTLY TO KREGER/J. COLLXNS SAFETY !=OR ACTIOi~l/INFORViATION ENVXRO BRANCH CHIEF:
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! Pii'G!~RJ~T01Jwa /AS EXTEI.NWL LIISTRIBUTION CONTROL NUMBER I.PDI': LYONS, NY ROCHESTER NY TX('SXC 1798 NRC FDIIM IGG I'2-7G)
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
~
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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