ML19260B175

LER 79-038/03L-0:on 791105,diesel Generator 1 Failed to Start During Diesel Generator 20% Plus Load Test.Caused by Component Failure.Breaker Position Switch Readjusted

ML19260B175
Person / Time
Site:	Oyster Creek
Issue date:	11/30/1979
From:	Ross D JERSEY CENTRAL POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19260B171	List: ML19260B170 ML19260B175
References
LER-79-038-03L, LER-79-38-3L, NUDOCS 7912070365
Download: ML19260B175 (4)

Text

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h O 2 l On November 5, 1979, Diesel Generator #1 failed to start during the 1 0 3 l Diesel Gen. 20% Plus Load Test. Generator breaker position switch 52HH l o 4 l did not close when the breaker was racked in and, therefore, prevented I o s  ; D.G. #1 from starting. The position switch was found to be out of adjust- l c is 1 i ment. After the switch was adjusted ar.d checked, the 20% Plus Load Test -

l 0 ,i was satisfactorily completed and D.G. #1 was returned to service. While iois [

D.G. #1 was being serviced, D.G. #2 was operated to satisfy TS 3.7.C.2. l so

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_ 21 22 l-l 23 l 013l 81 24 26 l/l 27 10 l 3l 28 29 l_LJ 30 l-l 31 l0l 32 AKEN O ON PL NT ME HOURS S B 1 FOR9 UB. SUPPL MANUFA URER l33E l@lG l@ l35Z l@ j Z l@ l0l0l0l0l lY l@ lY ]@ l43N l@ lGl0l8l0[g 34 36 37 40 41 42 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS i O .I Component failure was the cause of this event. The breaker position j i i i switch was out of adjustment. The position switch was readiusted. The I is 2 l position switch on the breaker for D.G. /2 was checked anc found ratis- I i C l factory. The diesel generator breaker position switch will be added to l 3 4 l the 4160 volt breaker P.M. procedure prior to the next refueling outage. l 7 8 9 80 ST S  % POWER OTHER STATUS Dis O RY DISCOVERY DESCRIPTION LEj@ l 0l 916l@l Operator Observation 1 5 NA l lBl@l 80 l

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I Jersey C4ntral Power & Ught Corapany rff ( ) Madison Avenue at Punch Bowl Road

- Morristown, New Jersey 07960 (201)455-8200 OYSTER CREEK NUCLEAR GENERATING STATION Forked River, New Jersey 08731 Licensee Event Report Reportable Occurrence No. 50-219/79-38/3L-0 Report Date November 30, 1979 Occurrence Date November 5, 1973 Identification of Occurrence Operating in a degraded mode as permitted by Technical Specifications, parag ph 3.7.C.2, when Diesel Generator #1 failed to start during a survelliance test. This event is considered to be a reportable occurrence as defined in the Technical Specifications, paragraph 6.9.2.b. (2).

Conditions Prior to Occurrence The plant was operating at steady state pewer. The major parameters at the time of the occurrence were:

Power: Reactor,1853 MWt Generator, 640 MWe Flow: Recirculation, 14.8 x 104 gpm Feedwater, 7.01 x 10 6 lb/hr Stack Gas: 3.19 x 104 pCi/sec Description of Occurrence On Monday, November 5, 1979, at approximately 4:00 a.m., while performing the Diesel Generator 20% Plus Load Test, diesel generatc.r breaker position switch 52HH did not close when the breaker was racked in. This prevented Diesel Generator #1 from starting. Upon immediate investigation, it was found that position switch 52HH was out of adjustment. Diesel Generator #2 was run for one hour to satisfy Technical Specification requirements before Diesel Generator #1 was serviced. A Job order was initiated to readjust the switch. The switch was readjusted and checked several times. Diesel Generator

1. 1 was returned to service after satisfactory completion of the 20% Plus Load Test

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]r4 1 Jersey Central Power & Light Company is a Member of the General Pub'ic Utilities System

Reportable Occurrence No. 50-219/79-38/3L-0 Page 2 November 30, 1979 Apparent Cause of Occurrence The cause of this occurrence is attributed to component failure. Position switch for breaker was out of adjustment.

Analysis of Occurrence _

The diesel generators are required to supply a standby source of power to operate equipment required for a safe plant shutdown and to maintain the plant in a safe shutdown condition. Each diesel is capable of operating the re-quired engineered safety equipment following an accident. Diesel Generator #2 was verified operable; therefore, the safety significance was considered minimal because there was an adequate amount of standby power and no other safety equipment was out of service.

Corrective Action The diesel generator breaker position switch check will be added to the 4160 volt breaker preventive maintenance procedure prior to the next year's refueling outage. The breaker position switch on Diesel Generator #2 was tested and found satisfactory.

Faiiure Data Circuit Breaker Manufacturer: General Electric Company Type: AK2 A 1 Switch: 52HH l 'll bb

OC/NRC Distribution:

cc: S. Bartnoff/R. O. Brokaw J. T. Carroll, Jr. (12)

T. M. Crimmins, Jr.

H. M. Dieckamp/R. C. Arnold /G. Bond /J. C. DeVine/C. R. Montgomery

1. R. Finfrock, Jr.

D. P. Gaines J. Knubel S. W. Laird J. B. Liberman H. K. Mayer/E. J. Sherratt E. F. O'Connor W. T. Osborne/M. B. Peters J . K. Pickard F. J. Smith /J. G. Herbein J. R. Thorpe T. i. Tipton G. F. Trowbridge H. J. Williams (2)

R. L. Williams Document Center / Plaza (2)

NJ Bureau of Radiation Protection Attention: Chief Division of E nvironmental Quality United Sierra Building 380 Scotch Road West Trenton, New Jersey 08625 Mr. Richard E. Smith Nuclear Systems & Materials EPRI 3212 Hillview Avenue Palo Alto, California 94303 Mr. D. Weinstein Plant Component Behavior Analysis General Electric Company 175 Curtner Avenue H.C./138

, San Jose, California 95125 151: 3oi