05000324/LER-1981-052-03, /03L-0:on 810609,reactor Recirculation Pump Motor Generator 2A Tripped During Unit Load Changes.Cause Unknown. Dirty Electrical Contacts Found in Field Breaker Closure Circuitry Cleaned

/03L-0:on 810609,reactor Recirculation Pump Motor Generator 2A Tripped During Unit Load Changes.Cause Unknown. Dirty Electrical Contacts Found in Field Breaker Closure Circuitry Cleaned

ML20009G177
Person / Time
Site:	Brunswick
Issue date:	06/29/1981
From:	Pastva M CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009G167	List: 05000324/LER-1981-052, Forwards LER 81-052/03L-0 05000324/LER-1981-052-03, /03L-0:on 810609,reactor Recirculation Pump Motor Generator 2A Tripped During Unit Load Changes.Cause Unknown. Dirty Electrical Contacts Found in Field Breaker Closure Circuitry Cleaned
References
LER-81-052-03L-01, LER-81-52-3L-1, NUDOCS 8108030398
Download: ML20009G177 (1)

LER-1981-052, /03L-0:on 810609,reactor Recirculation Pump Motor Generator 2A Tripped During Unit Load Changes.Cause Unknown. Dirty Electrical Contacts Found in Field Breaker Closure Circuitry Cleaned

Event date:
Report date:
3241981052R03 - NRC Website

text

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LICENSEE EVENT REPORT o

CONTROL BLOCK: l l

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lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6

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7 8 9 LICENSEE CODE 14 15 LICENSE NUMBER 2S 26 LICENSE TYPE Jo 57 CAT $8 CON'T R

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S URCE 7

8 60 61 DOCKET NUMBER 68 69 EVENT DATE 14 75 REPCAT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 10121 l While performing unit load changes af ter a normal reactor startup. 2A Reactor Recir-I o a i culation Pump motor generator (MG) tripped.

Following a reset of the MG trip signals,l l o 141 l the pump could not be started because the MG set generator field breaker would not l

[TTT1 I close.

2A Reactor Recirculation Pump was declared inoperable in accordance with l

0 6 l technical specifications. This event did not affect the health and safety of the 1

[O TTl I public.

I I o Ia l i Technical Specifications 3.4.1.1. 6.9.1.9B l

80 7

8 9 DE ODE SU C E COMPONENT CODE SUSCOdE S

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9 10 11 12 13 18 13 20 SEQUENTIAL OCCURRENCE REPORT REVISION LE R/RO EVENT YEA R REPORT NO.

CODE TYPE N O.

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ON P NT MET HOURS 22 58 I "OR 8.

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33 34 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i 11 IOII A visual inspection of the MG field win 9nes and an electrical check of the MG trio I

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y l circuitry did not reveal the cause of the,7 trip.

Dirty electrical contacts were j

i 2 i found in the field breaker closur? circuitry d ich prevented a pump restart but l

l which would not have caused the initial trip. Tee contacts were cleaned and on l

3 gl 6-10-81 the MG was started and the pump vas returned to operation.

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8 9 ST I

% POWER OTHLR STATUS DISC Y

DISCOVERY DESCRIPTION y W@ l 0 l 1l 3 l@l NA l

l A l@l Operational Event l

ACTIVITY CO TENT RELEASED OF RELEASE AMOUN* OF ACTIVITY LOCATION OF RELEASE NA l

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@l 1 6 PERSONNEL EXPOS ES oESCRiPTiON @

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l 010 l0 l@l 1 a 7

8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY TYPE

DESCRIPTION

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PDR ADOCK 05000324 NRC USE ONLY S

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8 9 10 68 69 80 5 (919) 457-9521 g

M. J. Pastva, Jr.

PHONE:

NAME OF PREPARER

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