ML17264B140

Part 21 Rept Re Binding Plunger of Assembly Shunt Trip Coil on 971114.Failed Shunt Trip Coil Was Replaced W/Spare from Stock

ML17264B140
Person / Time
Site:	Ginna
Issue date:	12/22/1997
From:	Mecredy R ROCHESTER GAS & ELECTRIC CORP.
To:	NRC
References
REF-PT21-97 NUDOCS 9712240281
Download: ML17264B140 (11)

Text

CATEGORY 1 REGULATC INFORMATXON DISTRIBUTION STEM (RXDS)

ACCESSION NBR:9712240281 DOC.DATE: 97/12/22 NOTARIZED: NO FACXL:50-244 Robert Emmet Ginna Nuclear Plant, Unit 1, Rochester AUTH.NAME AUTHOR AFFILXATION MECREDY,R.C.

Rochester Gas

& Electric Corp.

RECIP.NAME RECIPIENT AFFILIATION NRC - No Detailed AffiliationGiven DOCKET G

05000244

SUBJECT:

Part 21 rept re binding plunger of assembly shunt trip coil on 971114.Failed shunt trip coil was replaced w/spare from stock.

DISTRIBUTION CODE: IE19T'OPIES RECEIVED:LTR ENCL SIZE:

TITLE: Part 21 Rept (50 DKT)

NOTES:License Exp date in accordance with 10CFR2,2.109(9/19/72).

C 05000244E RECIP1ENT ID CODE/NAME PD1-1 PD INTERN

- FILE CENTE 1

NRR/DWM CB/B RES/DET/EIB RGN2 RGN4 COPIES LTTR ENCL 1

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1 1

1 1

1 1

1 1

1 1

RECIPIENT ID CODE/NAME VXSSING,G.

NRR/DRPM/PECB PDR WARD, M.

RGNl RGN3 COPIES LTTR ENCL 1

1 1

1 1

1 1

1 1

1 0

EXTERNAL: XNPO RECORD CTR

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1 NOAC SILVER,E NUDOCS FULL TXT 1

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N NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE. TO HAVE YOUR NAME OR ORGANIZATION REMOVED FROM DISTRIBUTION LISTS OR REDUCE THE NUMBER OF COPIES RECEIVED BY YOU OR YOUR ORGANIZATION, CONTACT THE DOCUMENT CONTROL DESK (DCD)

ON EXTENSION 415-2083 FULL TEXT CONVERSION REQUIRED TOTAL NUMBER OF COPIES REQUXRED:

LTTR 15 ENCL 15

0 E.

AND ROCHESTER 64$ ANDElECNICCORPOR4VON

~ 89 FASTAV&IUE,ROCHESTER, N.Y. ld6d9 DN1 AREA COPE716 546.27K ROBERT C. MECREDY Vice Prosldeal Nuclear Operalians December 22, 1997 U.S. Nuclear Regulatory Commission Operations Center Facsiniile Number 301-816-5151 Telephone Number 301-816-5100

Subject:

Initial Notification of 10 CFR Part 21 Defect R.E. Ginna Nuclear Power Plant Docket No, 50-244 In accordance with 10 CFR Part 21, Reporthg of Defects and Noncompliance, Section 21 (d)

(3) (i), which requires "Initial notification by facsimile", the enclosed initial notification is provided. %ritten notification, in accordance with 10 CFR Part 21, Section 21 (d) (3) (ii), will be provided by January 16, 1998.

Ve ly yours, G~

Robert C. Mecredy Enclosures 97i224028i 97i222

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10CFR21 INITIALFACSIMILE NOTIFICATION I,;.

~

NAME AND ADDRESS OF THE INDIVIDUAL INFORMING THE COMMISSION:

NAME:

'Robert C. Mecredy Vice-President Nuclear Operations Group ADDRESS:

Rochester Gas E Electric Corporation 89 East Avenue Rochester, New York 14649 IDENTIFICATION OP THE

PACXLITY, THE ACTIVITY, OR THE BASIC COMPONENT SUPPLIED FOR SUCH FACILITY WHXCH FAILS TO COMPLY OR CONTAINS A DEFECT:

The facility is the R.

E.

Ginna Nuclear Power Plant.

The basic component is the shunt trip coil on the

'~B" Emergency Diesel Generator (EDG)

Supply Breaker to Bus 16.

This breaker is a Westinghouse DB'-75 breaker and the Ginna equipment identification number is EIN 52/EG181.

I IDENTIFICATION OF THE FIRN CONSTRUCTING THE FACILITY OR SUPPLYING THE BASIC COMPONENT WHXCH FAILS TO COMPLY OR CONTAINS A DEFECT:

The shunt trip coil was supplied by:

Westinghouse Electric Corporation Power Systems Switchgear Division 700 Braddock Avenue East Pittsburgh, PA 15112 IV.

NATURE OP THE DEFECT

. OR FAILURE TO COMPLY AND THE SAFETY HAZARD WHICH IS CREATED OR COULD BE CREATED BY SUCH DEFECT OR FAILURE TO COMPLY:

The plunger of the assembly'shunt trip coil was binding.

The bound plunger was not returning to its deenergized position.

This maintained the breaker tripper bar in the trip free position and prevented the DB-75 circuit breaker from closing.

PAGE 3

C.

l Testing of the "B"

EDG Supply Breaker to Bus 16 was performed dur ing the 1997 outage.

The breaker failed to close.

The breaker could. not be closed electrically or manually with the tripper bar in

.the trip free position.

This failure would prevent the "B" EDG from supplying power to the safeguards loads on Bus 16.

This is considered a

maj or degradation

since, in conjunction with a

single failure on the redundant train, required safety functions could not be performed.

V.

THE DATE ON WHICH THE INFORMATION OF SUCH DEFECT OR FAILURE TO COMPLY WAS OBTAINED:

The information was obtained on November 14, 1997.

VX.

IN THE CASE OF A

BASIC COMPONENT HHXCH CONTAINS A

DEFECT OR FAILS TO

COMPLY, THE NUMBER AND LOCATION OF ALL SUCH COMPONENTS XN USE AT, SUPPLIED

FOR, OR BEiNG SUPPLIED FOR GXNNA STATION:

There are six Westinghouse DB-75 breakers permanently installed at Ginna Station, in safeguards buses la and

'6.

One of these breakers is manually operated and the shunt trip coil is not used.

In addition, there is one spare DB-75 breaker in stock.

The 52/801B1 breaker is the only DB-75 breaker that has had the shunt trip coil replaced.

The replacement shunt trip coil that failed was one of ten purchased in 1977 as spares.

VII.

THE CORRECTIVE ACTION WHICH HAS BEEN, IS BEING, OR WILL BE TAKEN; THE NAME OF THE INDIVIDUAL OR ORGANIZATION RESPONSIBLE FOR THE ACTION; AND THE LENGTH OF TIME THAT HAS BEEN OR WILL BE TAKEN TO COMPLETE THE ACTION:

Corrective action is complete.

The failed shunt trip coil was replaced with a spare from stock.

The assembly was manually and electrically bench tested.

.The remaining eight assemblies in stock were inspected.

Two assemblies had coil plungers that did not fully return to the deenergized position during manual manipulation.

These were removed from stock.

The other DB-75 breakers were visually inspected.

Acceptable plunger movement is indicated by adequate'lunger to tripper bar gap and full retraction of the alarm switch at tachment push rod.

No additional binding concerns were found.

v

PAGE 4

ANY ADVICE REIATED TO THE DEFECT OR FAXLURE TO COMPLY ABOUT THE FACXLXTY, ACTXVXTY, OR BASIC COMPONENT

THAT, HAS

BEEN, IS BEING, OR NZLL BE GIVEN TO PURCHASERS OR LICENSEES:

Receipt inspection could verify acceptable plunger movement.

During DB-75 breaker maintenance, consider verifying that the shunt trip coil plunger moves freely in the coil assembly.

TOTAL P.84

U

GENERAL INFORMATION or OTHER EVENT NUMBER:

33442 LICENSEE:

ROCHESTER GAS

& ELECTRIC CORP CITY: ROCHESTER REGION:

1 COUNTY:

STATE:

NY LICENSES:

AGREEMENT: Y DOCKET:

NOTIFICATION DATE: 12/22/97 NOTIFICATION TIME: 09:10

[ET]

EVENT DATE:

11/14/97 EVENT TIME:

12:00[EST]

LAST UPDATE DATE:

12/22/97 NOTIFICATIONS NRC NOTIFXED BY: JOHN ST.

MARTEN HQ OPS OFFICER:

DOUG WEAVER EMERGENCY CLASS:

NOT APPLICABLE 10 CFR SECTION:

CCCC 21.21 UNSPECIFIED PARAGRAPH JAMES NOGGLE VERN HODGE RDO EVENT TEXT PART 21 - DEFECTIVE SHUNT TRIP COILS THE LICENSEE DISCOVERED A WESTINGHOUSE DB-75 BREAKER THAT WAS FAILING TO CLOSE THE PLUNGER OF THE SHUNT TRZP COlL ASSEMBLY WAS BINDXNG, MAINTAININGTHE BREAKER TRIPPER BAR IN THE TRIP FREE POSITION.

THE LICENSEE HAS SEVEN DB-75 BREAKERS ON SITE, ONLY ONE HAD THE PROBLEM DESCRIBED.

THE BREAKER WXTH THE FAILED SHUNT TRIP COIL IS THE ONLY ONE TO HAVE HAD THAT PART PREVIOUSLY REPLACED.

THE REPLACEMENT SHUNT TRIP COIL THAT FAILED WAS ONE OF TEN PURCHASED IN 1977 AS SPARES.

THE FAILED SHUNT TRIP COIL WAS REPLACED WITH A SPARE FROM STOCK.

THE REMAINING EIGHT ASSEMBLIES IN STOCK WERE INSPECTED.

TWO ASSEMBLIES HAD COIL PLUNGERS THAT DID NOT FULLY RETURN TO THE DEENERGIZED POSITION DURING MANUAL MANIPULATION.

THESE WERE REMOVED FROM STOCK.

LICENSEE RECOMMENDS RECEIPT INSPECTION TO VERIFY ACCEPTABLE PLUNGER MOVEMENT AND ALSO VERIFYXNG THAT THE SHUNT TRIP COIL PLUNGER MOVES FREELY IN THE COIL ASSEMBLY DURING BREAKER MAINTENANCE.