Text

Rev 3 to Procedure 3.M.3-6, Insp & Overhaul of 480 Volt Load Ctr Breakers
	ML20236N787
Person / Time
Site:	Pilgrim
Issue date:	06/05/1981
From:	; BOSTON EDISON CO.
To:	;
Shared Package
ML20236N770	List: ML20236N767; ML20236N775; ML20236N779; ML20236N781; ML20236N784; ML20236N787; ML20236N791; ML20236N817; ML20236N847;
References
	FOIA-87-644 3.M.3-6, NUDOCS 8711170009
	Download: ML20236N787 (5)
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NUCLEAR' OPERATIONS DEPARTMENT FILCRIM NUC$. EAR POWER STATION Procedure No. 3.M.3-6 INSPECTION AND OVERHAUL OF 480V LOAD CENTER BREAKERS C :; - -

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.A k j PURPOSE The intent here is to give direction to the maintenance personnel for inspecting and/or overhauling of 480V L. C. Breakers. , 1 DISCUSSION Inspection and/or, overhaul will be accomplished in accordance with G.'E.

Hanual, GEK-7303, GEK-7302, GEI-50299, GEP-4149 ' and GEF-4150.

Information such as date of inspection or overhaul, breaker operation and component replacement will be entered'on the appropriate Visirec'ord Card. -

Proper isolation procedure will be followed and all electrical operation tests will be made at the breaker test station. ,

Following inspection and/or overhaul, and electrical operation tests, the breaker insulation level will be checked, utilizing the motorized ,

The results of this test vill be entered on the visirecord Card.

meggar. - l The breakers which will be covered Fy this procedure are as follows:

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.$o AK-25 AK-50

% AK-15 A.52-101 A.52-106 A.52-103 gE

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~" : 'J ,. .52-206 B.52-104 B.52-102 7 *t~ . C.52-201 g C.52-303 ,C .52-105 Y .: .c ,

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..52-305 E.52-204 E.52-301 403 F.52-205 F.52-401 1 2-405 G.52-302 '

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I.52-601,

'52-602' J.52-605 J.52-310 J. , -l l

K.52-402 K.52-701 j K.52-704 l L.52-404 L.52-801 L.52-705 ,

M.52-408 )

N.52-409 ,

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,1 h PROCEDURE s

to commencement.

A. Request pernission via WRP from Nuclear W. E. prior station.

B. Isolate via safety tags and remove the breaker to the test I '

C. Insure that the stored energy springs have been discharged. ,

D. Inspect'and/or overhaul the breaker in accordance with the applicable G.E. Manual.

E. Af ter reassembly of the breaker, test'to insure proper ciectrical operation, i

F. Make insulation level tests.

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G: Insert data in Visirecord File. /

l B. Release the breaker for operation to the' Watch Engineer and sign all safety tags,and the Work Request Permit.

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" APPENDIX C\ . ,~ 9J , ' A . Check List No. 3.M.3-6A

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, i DATE: .

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TItfE FINISHED: _

t STEP ACCEPTANCE f CRITEalA RE'SULTS AND !

/ ! INITIALS '

Request breaker isolation via a 1

1A W ' NOTES

_ RP throuch the W.E. i

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_1_B Remove station the breaker to the test I

. 2 eInsure.that the charging springs i

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are discharged l

%_ 3 Removeand Inspect & irisoect take upthe on Arc all Chutes 4 i rnech anica l . conn ec tions i

,% f Inspect & clean arcing c

. (replace where necessary)ontacts ! ~

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Lubricate all moving parts __

( 7 Inspect all control wiring 8 > In accor, dance with G.E. Manual _

check 6 nake ad just. where rea. I{ '

e. Thoroughly blow out or vacuum 1

{ Q)* all components of breaker j Lubricate the main contacts

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1 with cenducting grease

!_ 11 Reassemble items disassembled i d' urine' the above steps l

, Electrically operate the breaker 1 . '

,2' - - - -- from the test '

station to insure

correct operation

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l 13.M.Mr . . . ,. m ke insulation level' test uti- _

lizing the mojorized raencar on . . .

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the 500V setting

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~14 W s'T: _ Compute the Polarization Index

9V ' via the 1 and 10 min, - _

,115 .ig)'dW@4 Consult with the Maint. readings _

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i.1M S Return the breaker to WontheresultsoftheInsl.Tesh

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of the WRP. Release the breaker for service .

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